A Phase 3, Placebo Controlled, Double-Blind, Randomized, Clinical Study to Determine Efficacy, Safety, and Tolerability of Pulsed, Inhaled Nitric Oxide (iNO) Versus Placebo in Symptomatic Subjects With PAH (Part 1 and Part 2)
Phase: PHASE3
Conditions: Pulmonary Arterial Hypertension
Sponsor: Bellerophon Pulse Technologies

1. 
TITLE PAGE 
INHALED NITRIC OXIDE/INOPULSE DEVICE 
COMBINATION PRODUCT 
 
 PULSE-PAH-004 
 
A PHASE 3, PLACEBO CONTROLLED, DOUBLE-BLIND, 
RANDOMIZED, CLINICAL STUDY TO DETERMINE 
EFFICACY, SAFETY AND TOLERABILITY OF PULSED, 
INHALED NITRIC OXIDE (iNO) VERSUS PLACEBO IN 
SYMPTOMATIC SUBJECTS WITH PULMONARY ARTERIAL 
HYPERTENSION (PAH): INOvation-1 (Part 1 and Part 2) 
 
 
Document Type:  
 
 
 
Clinical Study Protocol 
 
Development Phase: 
 
 
 
Phase 3 
 
IND Number:  
 
 
 
 
111,070 
 
Original Protocol:  
 
 
 
25 August 2015 
Amendment 1:  
 
 
 
 
11 January 2017 
Amendment 2:  
 
 
 
 
21 April 2017 
Amendment 3:  
 
 
 
 
7 June 2017 
 
 
Company/Sponsor: 
 
 
 
Bellerophon Pulse Technologies LLC 
184 Liberty Corner Road, Suite 302 
Warren, New Jersey 07059  
Telephone: +1- 908-574-4770 
 
This confidential document is the property of Bellerophon Pulse Technologies LLC. No unpublished 
information contained herein may be disclosed without prior written approval from Bellerophon Pulse 
Technologies LLC. Access to this document must be restricted to relevant parties. 
 
 

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STUDY CONTACT INFORMATION  
 
Role in Study 
Sponsor’s Clinical Leads 
Sponsor’s Medical Lead 
Drug and Device Safety and 
Surveillance 
 
 
 

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PULSE-PAH-004 Amendment 3 
INVESTIGATOR'S AGREEMENT AND SPONSOR'S SIGNATURE PAGE 
I have read the attached protocol entitled "A Phase 3, Placebo Controlled, Double-Blind, 
Randomized, Clinical Study To Determine Efficacy, Safety and Tolerability of Pulsed, Inhaled 
Nitric Oxide (iNO) Versus Placebo In Symptomatic Subjects With Pulmonary Arterial 
Hypertension (PAH): INOvation-1 (Part 1 and Part 2)", and agree to abide by all provisions 
set forth therein. 
I agree to comply with the International Conference on Harmonization (ICH) Tripartite 
Guideline on Good Clinical Practice (GCP), the ethical principles stated in the latest 
version of the Declaration of Helsinki, ISO 14155 and the applicable local and 
international regulations, whichever provide the greater protection of the individual. 
I agree to ensure that the confidential information contained in this document will not be 
used for any purpose other than the evaluation or conduct of the clinical investigation 
without the prior written consent of Sponsor, Bellerophon Pulse Technologies LLC. 
Principal Investigator 
Date 
Sponsor Statement 
This study protocol was subject to critical review and has been approved by the 
following Sponsor representatives. 
3 
Confidential and Proprietary 

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2. 
SYNOPSIS 
Name of Sponsor/Company: 
Bellerophon Pulse Technologies LLC  
Name of Investigational Drug/Device Combination Product: 
Inhaled Nitric Oxide (iNO) / INOpulse  
Title of Study: A Phase 3, Placebo Controlled, Double-Blind, Randomized, Clinical Study to 
Determine the Efficacy, Safety and Tolerability of Pulsed, Inhaled Nitric Oxide (iNO) Versus Placebo 
in Symptomatic Subjects with Pulmonary Arterial Hypertension (PAH): INOvation-1 (Part 1 and Part 
2) 
Study center(s):  Up to approximately 115 
Principal Investigator: TBD 
Investigators: TBD 
Phase of development: 3 
 
Study period (years): 
Estimated date first subject enrolled   Part 1 June 2016 
Estimated date last subject enrolled:  Part 1 Jan 2018 
Duration of treatment:  
Part 1 
Blinded Treatment Period: Maximum of 18 weeks. 
Estimated Completion Date:  After the last subject completes 18 week assessments  
Part 2 
Open Label Extension Period: Subjects will be offered open label therapy when the subject completes 
18 weeks of blinded drug therapy.  All subjects must have completed all assessments in Part 1 and 
remain on blinded treatment until week 18 before proceeding to Part 2. 
Estimated Completion Date:  Open Label Treatment with iNO at 75 mcg/kg IBW/hr with the 
INOpulse delivery device will be available to subjects who completed Part 1 until the drug-device 
investigational product is approved and available as a marketed product or the Sponsor decides to 
discontinue development of iNO for PAH or the Sponsor decides to terminate the study. 
Objectives:  
Part 1 -Blinded Treatment Period: 
Primary Objective:  
To evaluate the efficacy of inhaled nitric oxide (iNO) on exercise using 6-minute walk distance 
(6MWD) in subjects with pulmonary arterial hypertension (PAH) currently receiving background PAH 
medication and LTOT. 
Secondary Objectives: 
1. To evaluate the time to clinical worsening (TTCW)  
2. To evaluate change in World Health Organization (WHO) Functional Class 
 
 

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Safety Objectives: 
1. To evaluate the safety and tolerability of iNO 
 
Tertiary Objectives: 
1. To evaluate changes in health-related quality of life using the Short Form-36 (SF-36) version 2 
health survey 
2. To evaluate the impact of iNO on pulmonary hemodynamics in a subset of subjects  
3. To evaluate changes in right ventricular (RV) and left ventricular (LV) function as measured by 
echocardiography, in a subset of subjects 
4. To evaluate changes in N-terminal of the prohormone brain natriuretic peptide (NT-proBNP) 
5. To evaluate change in Borg dyspnea score immediately following 6-minute walk test (6MWT) 
6. To evaluate change in 6MWD as related to degree of correlation between drug adherence and 
clinical efficacy measurement 
7. To evaluate subjects with unsatisfactory clinical response 
8. To evaluate the impact of iNO on frequency of heart-lung or lung transplantation, and deaths while 
awaiting transplantation 
9. To evaluate the impact of iNO on medical resource utilization 
 
Part 2 Open Label Period: 
Primary Objective: 
1. To Evaluate the long term safety and tolerability of iNO 
Secondary Objective: 
2. To Evaluate the change in exercise tolerance in subjects who switch from placebo to active 
therapy 
Endpoints: 
Part 1 Blinded Treatment Period: 
 
Primary Endpoint: The efficacy of iNO as measured by the placebo-adjusted change in 6MWD from 
baseline to 18 weeks. 
Secondary Endpoints: 
1. TTCW: The time (in days) from start of treatment to first event (first day the event is noted), with 
iNO as compared to placebo, measured from baseline to 18 weeks. TTCW event is defined as any 
of the following: 
a. Death (all-cause mortality) 
b. Atrial septostomy 
c. Hospitalization due to worsening of PAH (adjudicated) 
d. Start of new specific PAH treatment (endothelin receptor antagonists [ERAs], 
phosphodiesterase type-5 [PDE-5] inhibitors or prostanoids), an increase in the dose of 
an ERA or PDE-5, increase in the dose or frequency of an inhaled prostanoids, or an 
increase in the dose of an intravenous or subcutaneous prostanoids by >10%. 
e. Decrease of >15% from baseline or > 30% compared with the last study related 
measurement in 6MWD and should be confirmed by a repeat measurement performed 
at least 14 days later 

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f. Worsening of WHO Functional Class (e.g., from Class II to Class III or IV, OR 
Class III to Class IV); and should be confirmed by a repeat assessment at least 14 days 
later  
2. Change in WHO Functional Class, with iNO as compared to placebo, from baseline to 18 weeks. 
Tertiary Endpoints: 
1. Change in health-related quality of life (using SF-36 version 2 health survey), with iNO as 
compared to placebo, from baseline to 18 weeks  
2. Change in pulmonary hemodynamics (i.e., cardiac output [CO], cardiac index [CI], mean 
pulmonary artery pressure [mPAP], mean pulmonary capillary wedge pressure [mPCWP], 
systolic pulmonary artery pressure [sPAP], diastolic pulmonary artery pressure [dPAP], 
pulmonary vascular resistance [PVR], and oxygen saturation by pulse oximeter [SpO2], mixed 
venous O2, and right atrial pressure [RAP]), measured by right heart catheterization (RHC), 
with iNO as compared to placebo, from baseline to 18 weeks, in a subset of subjects 
(approximately 50), at selected sites 
3. Change in echocardiogram measurements right ventricular function (including right ventricular 
fractional area change, systolic pulmonary artery pressure [sPAP], tricuspid annular 
motion/tricuspid annular plane systolic excursion, tricuspid annular systolic velocity, and Tei 
index) and left ventricular function (including left ventricular ejection fraction [LVEF], LV 
size, and improvement in LV early diastolic relaxation velocity), with iNO as compared to 
placebo, from baseline to 18 weeks, in a subset of subjects (approximately 50), at selected sites 
4. Change in NT-proBNP, with iNO as compared to placebo, from screening to 18 weeks 
5. Change in Borg dyspnea score immediately following 6MWT, with iNO as compared to 
placebo, from baseline to 18 weeks  
6. Change in 6MWD as related to degree of drug adherence, with iNO as compared to placebo, 
from baseline to 18 weeks  
7. The number of subjects with unsatisfactory clinical response, with iNO compared to placebo, 
from baseline to 18 weeks. Defined as: WHO Functional Class III or IV symptoms with no 
improvement in 6MWD 
8. Number of subjects undergoing heart-lung or lung transplantation, number of subjects listed for 
transplantation, and deaths while awaiting transplantation, from baseline to 18 weeks 
9. Medical resource utilization, with iNO as compared to placebo, from baseline to 18 weeks  
Safety Endpoints:  
1. Incidence and severity of adverse events (AEs) 
2. Incidence of device malfunction and/or device failure leading to an AE 
3. Incidence of rebound pulmonary hypertension (PH) 
4. Clinically significant changes in the following:  
a. Clinical laboratory tests 
b. Pulmonary function tests 
c. Vital signs 

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Part 2 Open Label Period: 
 
Primary Endpoint: 
1.   The incidence of AEs and SAEs with long term therapy 
  Secondary Endpoint: 
1.   To evaluate the change in 6MWD in subjects who switch from placebo to active therapy at 4 
months, 8 months and 12 months of therapy 
 
Methodology:  
This is a Phase 3, randomized, double-blind, placebo-controlled, parallel-group design to determine the 
efficacy, safety and tolerability of pulsed iNO versus placebo in symptomatic subjects with PAH.  
Part 1 Blinded Treatment Phase: 
Subjects will be randomized (1:1) at Week 0 to placebo at a dose setting of 75 mcg/kg ideal body 
weight (IBW)/hr, or iNO at a dose setting of 75 mcg/kg IBW/hr.   
Following randomization, subjects will enter a 2 week run-in period. Subjects randomized to placebo 
will receive placebo and subjects randomized to active NO will receive low dose iNO at 15 mcg/kg 
IBW/hr. Subjects who do not comply with the required usage of the investigational INOpulse delivery 
device (hereafter INOpulse device) for an average of 12 hours per day, or longer, during the Run-in 
period will be discontinued. Those who qualify will enter into Part 1, the blinded treatment period, in 
the cohort they were randomized to at Week 0.  Randomization will be stratified for use of prostanoids 
at baseline. 
Part 2 Open Label Period: 
After subjects have completed 18 weeks of blinded drug therapy and all assessments in Part 1 , subjects 
will be offered open label treatment with iNO 75 mcg/kg IBW/hr. 
Number of subjects (planned): 188 
Number of sites:  Up to approximately 115 
 
 

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Part 1 Blinded Treatment Period:  Diagnosis and main criteria for inclusion and exclusion:  
Inclusion criteria: 
1. Signed Informed Consent Form (and assent as appropriate) prior to the initiation of any study 
mandated procedures or assessments 
2. A confirmed diagnosis of PAH Group 1 who have either idiopathic PAH (IPAH), heritable PAH, 
drug and toxin-induced PAH, associated PAH (APAH) with connective tissue disease (CTD), 
APAH with congenital heart disease (unrepaired or repaired at least 1 year prior to Screening), 
APAH with human immunodeficiency virus (HIV), or APAH with portal hypertension 
3. Subjects receiving at least one PAH specific therapy (ERA or PDE-5 inhibitor, or inhaled, 
subcutaneous, or intravenous prostacyclin or a prostacyclin analog) with the same type of therapy 
for at least 3 months with stable dosing 4 weeks prior to Screening. (Subjects should be 
receiving optimal therapy according to the disease severity) 
 
4. Subjects using oxygen therapy by nasal cannula for at least 4 weeks prior to Screening 
5. PAH diagnosis confirmed by RHC within the previous 5 years, according to the following 
definitions: 
• PVR ≥ 400 dynes.sec.cm-5 (5 Wood units) 
• mPAP ≥ 25 mmHg  
• PCWP or LVEDP ≤ 15 mmHg 
• Subjects who otherwise meet all the inclusion criteria and none of the exclusion criteria 
but have not undergone a RHC within the previous 5 years may be considered eligible for 
the study if they undergo a RHC and then meet the pulmonary hemodynamics criterion 
6. 6MWD ≥ 100 meters and ≤ 450 meters prior to randomization 
7. WHO Functional Class II-IV. Subjects with WHO Functional Class IV should be treated with 
prostacyclin or a prostacyclin analog (subcutaneous or intravenous), plus at least one additional 
PAH specific therapy (ERA or PDE-5), if available to the subject and reimbursed by health 
insurance 
8. Age between 18 and 85 years (inclusive) 
9. Willingness to use INOpulse delivery device for at least 12 hours per day 
10. Willingness to continue on study drug until subject completes Week 18 assessments  
11. Female subjects of childbearing potential must have a negative pre-treatment pregnancy test (serum 
or urine). All female subjects should take adequate precaution to avoid pregnancy.  
Exclusion criteria:  
1. Subjects with known HIV infection who have a history within the past 3 months of any 
opportunistic pulmonary disease (e.g., tuberculosis, Pneumocystis carinii pneumonia, or other 
pneumonias) at the time of Screening 

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2. PAH associated with untreated thyroid disorders, glycogen storage disease, Gaucher’s disease, 
hereditary hemorrhagic telangiectasia, hemoglobinopathies, myeloproliferative disorders or 
splenectomy 
3. Subjects with pulmonary conditions that may contribute to PAH including, but not limited to, 
chronic bronchiectasis, cystic fibrosis, or other pulmonary condition that the Investigator may deem 
to contribute to the severity of the disease or impair the delivery of iNO due to airway disease 
4. Subjects receiving riociguat   
5. Subjects receiving oral prostanoids as monotherapy 
6. PAH associated with significant venous or capillary involvement, known or suspected pulmonary 
veno-occlusive disease, or pulmonary capillary hemangiomatosis 
7. Any subject with WHO PH Groups 2, 3, 4 or 5 
8. Subjects with any of the following cardiac abnormalities:  
a. Underlying cardiomyopathy or clinically significant aortic or mitral valve disease in the 
opinion of the investigator 
b. Left ventricular systolic dysfunction (LVSD), i.e., left ventricular ejection fraction (LVEF) 
< 40% or left ventricular shortening fraction (LVSF) < 22%, as determined by local reading 
c. Current symptomatic coronary artery disease, myocardial infarction within 1 year, or any 
coronary artery interventions within 6 months 
9. Systemic hypertension defined as systolic blood pressure (SBP) > 160 mmHg and/or diastolic blood 
pressure (DBP) > 100 mmHg persistent at Screening after a period of rest (treated or untreated) 
10. Subjects with a history of deep vein thrombosis, pulmonary embolism/infarction or prothrombotic 
disorder must have had chronic thromboembolic pulmonary hypertension (CTEPH) excluded by 
ventilation/perfusion lung (V/Q) scan  
11. Severe obstructive lung disease defined as both a forced expiratory volume in 1 second/forced vital 
capacity (FEV1/FVC) < 70% and FEV1 < 55%of predicted value  
12. Moderate to severe restrictive lung disease: total lung capacity (TLC) < 60% of predicted; if TLC 
60% to 70% predicted, a high resolution CT scan showing diffuse disease or more than mild patchy 
disease  
13. Any subject who develops or has developed a PCWP > 20 mmHg during acute vasodilator testing 
(AVT) 
14. Systemic hypotension defined as SBP < 90 mmHg persistent at Screening after a period of rest 
15. Moderate to severe hepatic impairment, i.e., Child-Pugh Class B or C 
16. On dialysis 
17. Acute or chronic physical impairment (other than dyspnea due to PAH) that would limit the ability 
to comply with study procedures or adherence to therapy (i.e., 6MWT), including carrying and 
wearing the pulsed delivery device per study protocol, or medical problem(s) likely to preclude 
completion of the study 
18. Pregnant or breastfeeding females at Screening 

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19. Administered L-arginine within 1 month prior to Screening 
20. Known concomitant life-threatening disease with a life expectancy less than 1 year 
21. Atrial septostomy within 3 months preceding randomization 
22. The concurrent use of the INOpulse device with a continuous positive airway pressure (CPAP), 
Bilevel positive airway pressure BiPAP, or any other positive pressure device. 
23. Use of investigational drugs or devices within 1 month prior to Screening (other than acute 
vasodilator testing with iNO) 
24. Any underlying medical or psychiatric condition that, in the opinion of the Investigator, makes the 
subject an unsuitable candidate for the study 
25. Any subject who has been enrolled in any previous clinical study with inhaled NO administered 
through pulse delivery. 
Additional Criteria to Continue to Treatment Phase from Run-in period (Week 0 to Week 2) 
1. Subjects must demonstrate an average daily usage of the INOpulse device of ≥ 12 hours (rounded to 
the nearest hour), with no more than 2 days of usage < 8 hours per day, during the initial 2 weeks of 
study. 
2. If a subject experiences clinical worsening during the Screening or Run-in period, the subject will 
not be eligible to enter into the treatment phase of the study.     
3. Subjects who have been randomized at baseline and found not to meet all Inclusion criteria and/or 
who meet Exclusion criteria during the Run-in period will be withdrawn from the study. These 
subjects will be replaced to meet total target enrollment. 
Part 2 Open Label Period:  Diagnosis and main criteria for inclusion and exclusion: 
Inclusion Criteria Part 2: 
1.  Informed Consent Form prior to the initiation of any study mandated procedures or assessments 
2. Subject must have completed 18 weeks of blinded therapy and all assessments at week 18 
3. In the opinion of the Investigator, open label treatment is in the best interest of the subject after 18 
weeks of blinded treatment is completed  
Exclusion Criteria Part 2 Open Label Period: 
1. Subject has initiated therapy with Riociguat 
Investigational product, dosage and mode of administration:  
Part 1 Blinded Treatment Period: 
In a randomized, double-blind manner, all subjects randomized to iNO at a dose setting of 75 mcg/kg 
IBW/hr will be treated by means of an INOpulse delivery device and product-specific cannula. The 
active study drug, nitric oxide for inhalation (iNO), will be provided in size 0.074 liter aluminum 
cartridge at a concentration of 6.0 mg/L (4880 ppm). All subjects will change cartridges approximately 
every 12 hours. 
All subjects randomized to receive iNO will receive 15 mcg/kg IBW/hr for the first 2 weeks (Run-in 
phase) followed by iNO at 75 mcg/kg IBW/hr for 16 weeks. 
 

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Part 2 Open Label Period: 
All subjects enrolled in Part 2 Open label treatment will receive iNO at 75 mcg/kg IBW/hr.  
Duration of treatment:  
Part 1 Blinded Treatment Period: 
Until the subject has completed 18 weeks of blinded treatment   
Part 2 Open Label Period: 
Subjects will remain on therapy until the investigational drug device is approved and available as a 
marketed product or the Sponsor decides to discontinue development of iNO for PAH or the Sponsor 
decides to terminate the study. 
Reference therapy, dosage and mode of administration:  
Part 1 Blinded Treatment Period: 
In a randomized, double-blind manner, all subjects randomized to placebo at a dose setting of 75 
mcg/kg IBW/hr will be treated by means of an INOpulse delivery device and product-specific cannula. 
Placebo to match study drug and supplied in size 0.074 liter aluminum cartridge containing N2, 
99.999% gas. All subjects will change cartridges approximately every 12 hours. 
All subjects randomized to receive placebo will receive 15 mcg/kg IBW/hr for the first 2 weeks (Run-in 
phase) followed by placebo at a dose setting of 75 mcg/kg IBW/hr for 16 weeks.  
Part 2 Open Label Phase: 
Subjects will receive open label treatment only 75 mcg/kg IBW/hr, there is no placebo. 
 
 
 

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Statistical methods: 
An intent-to-treat (ITT) population that consists of all randomized subjects who remained eligible after 
the Run-in period will be used for all the efficacy analyses, each patient will be analyzed according to 
the treatment to which they were randomized.  
A safety population that includes all randomized subjects who receive the study treatment and who 
remained eligible after the Run-in period will be used for all the safety analyses. In addition, an analysis 
of safety for all randomized subjects who receive the study treatment and who became ineligible after 
the Run-in period will be conducted.  For the safety population, each patient will be analyzed according 
to the treatment administered. 
The primary statistical test for the primary endpoint will be performed using a repeated measures mixed 
model with the baseline stratification factor (i.e., the prostanoid usage status) treatment arm, week and 
treatment-by-week as the fixed effects. As a covariate, baseline 6MWD assessment (defined by the 
average of two 6MWTs at Week 2 after the completion of the run-in phase) will be included in the 
model. In case the normality assumption is invalid, the primary efficacy endpoint will be analyzed using 
the van Elteren test stratified by the prostanoid usage status. Summary statistics will be provided for all 
study variables with descriptive statistics (number of observations, mean, standard deviation, median, 
minimum, maximum and from the analysis model the least squares means, SAE’s and confidence 
limits) for numerical (or continuous) variables and with frequency and percentage for categorical 
variables.    
Exploratory analyses will be performed to evaluate the effects of demographics and baseline 
characteristics on the efficacy response with appropriate statistical methods. Subgroup analyses based 
on study drug usage, background therapies, demographics and baseline characteristics, as well as other 
study compliance status will be conducted. Additional statistical methods such as mixed effects model 
and Cochran-Mantel-Haenszel (CMH) test (for dichotomized response analysis) may be utilized in the 
exploratory analyses. 
Interim analyses will be conducted when data is available from 75 patients.  The purpose of the interim 
analysis is to stop the trial early for efficacy or futility or to continue the trial to 150 or 188 patients 
(total randomized is higher to account for an anticipated 20% drop out rate). Group sequential early 
stopping criteria and sample size re-estimation methodology are further described in the statistics 
section of this protocol.  They are constructed to control overall type 1 error at 0.025, 1-sided.  
Simulations assuming true underlying mean treatment difference in 6MWD ranging from 30-70 meters 
and SD's from 50 to 75 meters yielded >87% power for all cases except the most extreme case (mean 
difference 30 meters and SD 75, for which power was ~71%. 
 

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3. 
TABLE OF CONTENTS, LIST OF TABLES, AND LIST OF 
FIGURES  
TABLE OF CONTENTS 
1. 
TITLE PAGE ................................................................................................................1 
2. 
SYNOPSIS ...................................................................................................................4 
3. 
TABLE OF CONTENTS, LIST OF TABLES, AND LIST OF FIGURES ...............13 
4. 
LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS.............................20 
5. 
INTRODUCTION ......................................................................................................24 
5.1. 
Pulsed Inhaled Nitric Oxide for Treatment of Long-Term Pulmonary Arterial 
Hypertension ...............................................................................................................25 
5.2. 
Inhaled Nitric Oxide ...................................................................................................26 
5.3. 
INOpulse Device ........................................................................................................26 
6. 
OBJECTIVES .............................................................................................................28 
6.1. 
Primary Objective .......................................................................................................28 
6.1.1. 
Secondary Objectives .................................................................................................28 
6.1.2. 
Safety Objectives ........................................................................................................28 
6.1.3. 
Tertiary Objectives .....................................................................................................28 
6.2. 
Part 2 -Open Label Period: .........................................................................................29 
6.2.1. 
Primary Objective: ......................................................................................................29 
6.2.2. 
Secondary Objective: ..................................................................................................29 
7. 
ENDPOINTS ..............................................................................................................30 
7.1. 
Part 1 Blinded Treatment Period ................................................................................30 
7.1.1. 
Primary Endpoint ........................................................................................................30 
7.1.2. 
Secondary Endpoints ..................................................................................................30 
7.1.3. 
Tertiary Endpoints ......................................................................................................30 
7.1.4. 
Safety Endpoints .........................................................................................................31 
7.2. 
Part 2 Open Label Period: ...........................................................................................31 
8. 
STUDY DESIGN .......................................................................................................32 
8.1. 
Overall Study Design ..................................................................................................32 
8.2. 
Treatment Assignment ................................................................................................33 
8.3. 
Study Design Rationale ..............................................................................................35 
9. 
STUDY POPULATION .............................................................................................36 
9.1. 
Population ...................................................................................................................36 

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9.2. 
Number of Subjects to be Studied ..............................................................................36 
9.3. 
Inclusion Criteria ........................................................................................................36 
9.4. 
Exclusion Criteria .......................................................................................................37 
10. 
SUBJECT DISCONTINUATION, WITHDRAWAL AND TERMINATION 
FROM THE STUDY, SUBJECT REPLACEMENT, AND PROTOCOL 
DEVIATION CRITERIA ...........................................................................................40 
10.1. 
Subject Discontinuation from Study Drug/Device .....................................................40 
10.2. 
Subject Withdrawal from Study .................................................................................40 
10.2.1. 
Subject Withdrawal During Run-In Period ................................................................40 
10.3. 
Subjects Lost to Follow-Up .........................................................................................41 
10.4. 
Interruption of Study Drug .........................................................................................41 
10.5. 
Study Termination Criteria .........................................................................................41 
10.6. 
Deviations from the Protocol ......................................................................................41 
11. 
STUDY SCHEDULE OF ASSESSMENTS ..............................................................42 
11.1. 
Details of Study Assessments .....................................................................................51 
11.1.1. 
Informed Consent .......................................................................................................51 
11.1.2. 
Medical History ..........................................................................................................52 
11.1.3. 
Prior and Concomitant Medications ...........................................................................52 
11.1.3.1. 
Diuretic Use ................................................................................................................52 
11.1.3.2. 
PAH Specific Therapies .............................................................................................52 
11.1.4. 
WHO Functional Class ...............................................................................................52 
11.1.5. 
6 Minute Walk Test ....................................................................................................53 
11.1.6. 
Borg Dyspnea Scale ....................................................................................................54 
11.1.7. 
Vital Sign Measurements ............................................................................................54 
11.1.8. 
Spirometry Testing and DLCO ...................................................................................55 
11.1.9. 
Physical Examination .................................................................................................55 
11.1.10. 
Pregnancy Test ............................................................................................................55 
11.1.11. 
Hematology, Chemistry, Methemoglobin, NT-proBNP.............................................56 
11.1.12. 
Eligibility of INOpulse Device Usage ........................................................................56 
11.1.13. 
Right Heart Catheterization ........................................................................................57 
11.1.13.1. RHC Procedure ...........................................................................................................57 
11.1.13.2. Hemodynamic Calculations ........................................................................................58 
11.1.14. 
Echocardiogram ..........................................................................................................58 

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11.1.15. 
Evaluation for Symptomatic Rebound Pulmonary Hypertension ..............................59 
11.1.16. 
Patient Reported Outcomes ........................................................................................60 
11.1.16.1. SF-36...........................................................................................................................60 
11.1.17. 
Adverse Events ...........................................................................................................60 
11.1.17.1. Adverse Events of Special Interest .............................................................................61 
11.1.18. 
Drug Dispensing for Run-in Period ............................................................................61 
11.1.19. 
Drug Dispensing for Blinded Treatment Period (Part 1) ............................................61 
11.1.20. 
Drug Dispensing for Open Label Long Term Extension (Part 2) ..............................61 
11.1.21. 
Drug/Device Usage .....................................................................................................61 
11.1.22. 
INOpulse Device Questionnaire .................................................................................62 
11.1.23. 
Survival Assessment ...................................................................................................62 
11.1.24. 
Medical Resource Utilization .....................................................................................62 
11.1.25. 
Lung Transplantation Listing Status ...........................................................................62 
12. 
INVESTIGATIONAL STUDY DRUG AND DEVICE ............................................64 
12.1. 
Rationale for Study Design and Dose .........................................................................64 
12.2. 
Description of Study Drug and Device .......................................................................64 
12.2.1. 
Inhaled Nitric Oxide ...................................................................................................64 
12.2.2. 
INOpulse Device Description and Operation .............................................................64 
12.2.3. 
Traveling with iNO/INOpulse Combination Therapy ................................................64 
12.3. 
Study Drug Administration.........................................................................................65 
12.4. 
Packaging and Labeling of Study Products .................................................................65 
12.5. 
Storage, Dispensing, and Accountability of Investigational Study Products ..............65 
12.5.1. 
Storage ........................................................................................................................65 
12.5.2. 
Dispensing ..................................................................................................................66 
12.5.3. 
Accountability of Investigational Study Products ......................................................67 
12.6. 
Study Drug and Device Disposition ............................................................................67 
12.7. 
Treatment Usage .........................................................................................................67 
13. 
RANDOMIZATION, BREAKING OF BLINDED CODES AND 
INTERACTIVE RESPONSE TECHNOLOGY (IRT) SYSTEM ..............................68 
13.1. 
Randomization and Blinding ......................................................................................68 
13.2. 
Breaking of Blinded Codes .........................................................................................68 
13.3. 
Interactive Response Technology (IRT) .....................................................................68 
14. 
CONCOMITANT MEDICATIONS ..........................................................................69 

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14.1. 
Allowed PAH Approved Medication Changes During the Study ..............................69 
15. 
ADVERSE EVENTS AND DEVICE DEFICIENCIES ............................................70 
15.1. 
Definitions ..................................................................................................................70 
15.1.1. 
Adverse Event .............................................................................................................70 
15.1.2. 
Adverse Device Effect ................................................................................................70 
15.1.3. 
Device Deficiency ......................................................................................................70 
15.1.4. 
Suspected Adverse Reaction .......................................................................................70 
15.1.4.1. 
Unexpected Adverse Event or Unexpected Suspected Adverse Reaction .................70 
15.1.5. 
Adverse Events of Special Interest .............................................................................71 
15.1.6. 
Serious Adverse Event or Serious Adverse Reaction .................................................71 
15.1.7. 
Unanticipated Serious Adverse Device Effect ............................................................72 
15.1.8. 
Life Threatening .........................................................................................................72 
15.1.9. 
Serious, Unexpected, Suspected Adverse Reaction ...................................................72 
15.2. 
Severity and Causality Assessment for Adverse Events ................................................72 
15.2.1. 
Severity .......................................................................................................................72 
15.2.2. 
Causality Assessment for Adverse Events .................................................................72 
15.3. 
Outcome Assessment for Adverse Events ..................................................................75 
15.4. 
Collection, Recording and Reporting of Adverse Events and Investigational 
Product Complaints/Deficiencies ................................................................................75 
15.4.1. 
Collection of Adverse Events and Serious Adverse Events .......................................75 
15.4.2. 
Collection of Investigational Product Complaints/Deficiencies .................................76 
15.4.3. 
Serious Adverse Events and Medical Device Deficiency Reporting .........................76 
15.4.3.1. 
Site Reporting to IRB/IEC ..........................................................................................77 
15.4.3.2. 
Sponsor Reporting to Regulatory Authorities, Investigators, and Independent 
Ethics Committee ........................................................................................................77 
15.5. 
Steering Committee ....................................................................................................77 
15.6. 
Data Monitoring Committee .......................................................................................77 
15.7. 
Independent Clinical Events Committee .....................................................................78 
16. 
STATISTICAL CONSIDERATIONS .......................................................................79 
16.1. 
Population(s) for Analysis ...........................................................................................79 
16.2. 
Sample Size Determination ........................................................................................79 
16.3. 
Efficacy Analyses .......................................................................................................79 
16.3.1. 
Primary Efficacy Endpoint .........................................................................................79 

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16.3.2. 
Secondary Efficacy Endpoints ....................................................................................80 
16.3.3. 
Tertiary Endpoints ......................................................................................................81 
16.3.4. 
Multiplicity Adjustment..............................................................................................82 
16.3.5. 
Handling Missing Data ...............................................................................................82 
16.4. 
Safety Analyses ..........................................................................................................82 
16.5. 
Interim Analysis ..........................................................................................................83 
17. 
MONITORING PROCEDURES................................................................................85 
17.1. 
Study Monitoring ........................................................................................................85 
18. 
RESPONSIBILITIES .................................................................................................86 
18.1. 
Quality Control and Quality Assurance ......................................................................86 
18.2. 
Audits and Inspections ................................................................................................86 
18.3. 
Investigator and Study Staff Requirements ................................................................86 
19. 
DATA MANAGEMENT AND RECORDKEEPING ...............................................87 
19.1. 
Electronic Case Report Forms ....................................................................................87 
19.2. 
Case Report Forms .....................................................................................................87 
19.3. 
External Data ..............................................................................................................87 
19.4. 
Inspection of Records .................................................................................................87 
19.5. 
Retention of Records/Critical Documents ..................................................................88 
20. 
ETHICS ......................................................................................................................89 
20.1. 
Informed Consent Form(s) for Study Subjects ...........................................................89 
20.2. 
Independent Ethics Committee/Institutional Review Board ......................................89 
20.2.1. 
Amendments to the Protocol ......................................................................................89 
21. 
REPORTS AND PUBLICATIONS ...........................................................................90 
22. 
LIST OF REFERENCES ............................................................................................91 
APPENDIX A. INSTRUCTIONS FOR 6MWT.  SIX MINUTE WALK TEST AND 
OXIMETRY (OXYGEN SATURATION, SPO2) .....................................................93 
 

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LIST OF TABLES 
Table 1: 
Dosing Assignments for Run-in and Treatment Periods ............................................33 
Table 2: 
Part 1 : Schedule of Assessments ...............................................................................47 
Table 3: 
WHO Functional Classification ..................................................................................52 
Table 4: 
Borg Dyspnea Score ...................................................................................................54 
Table 5: 
Dosing Regimen via INOpulse Device .......................................................................65 
Table 6: 
Adverse Events Common to the PAH Population ......................................................74 
Table 7: 
Interim and Final Analysis Rules ...............................................................................84 
Table 8: 
Roles and Access Levels to Remote Data Capture System ........................................87 
 

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LIST OF FIGURES 
Figure 1: 
Study Design ...............................................................................................................34 
 
  

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4. 
LIST OF ABBREVIATIONS AND DEFINITIONS OF TERMS 
Abbreviation or Specialist Term 
Explanation 
6MWD 
6 minute walk distance 
6MWT 
6 minute walk test 
AE 
adverse event 
AESI 
adverse event of special interest 
ANOVA 
analysis of variance 
APAH 
associated pulmonary arterial hypertension 
AVT 
acute vasodilator testing 
BDS 
Borg dyspnea score 
BiPAP 
Bilevel positive airway pressure 
BNP 
B-type natriuretic peptide 
BP 
blood pressure 
Bpm 
beats per minute 
BSA 
body surface area 
CDC 
Central Distribution Center 
CI 
cardiac index 
CO 
cardiac output 
COPD 
chronic obstructive pulmonary disease 
CPAP 
continuous positive airway pressure 
CRO 
clinical research organization 
CTD 
connective tissue disease 
CTEPH 
chronic thromboembolic pulmonary hypertension 
DLCO 
diffusing capacity for the lungs measured using carbon 
monoxide 
DMC 
Data Monitoring Committee 

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Abbreviation or Specialist Term 
Explanation 
DBP 
diastolic blood pressure 
dPAP 
diastolic pulmonary artery pressure 
EAS 
electronic adjudication system 
eCRF 
electronic case report form 
ECG 
electrocardiogram 
ERA 
endothelin receptor antagonists 
EOS 
end of study 
FEV1 
forced expiratory volume in 1 second 
FiO2 
fraction of inspired oxygen 
FPFV 
First Patient First Visit 
FVC 
forced vital capacity 
GCP 
Good Clinical Practice 
HIV 
human immunodeficiency virus 
HR 
heart rate 
HRQoL 
health related quality of life 
HRU 
healthcare resource utilization 
IA 
Interim Analysis 
IBW 
ideal body weight 
IEC 
Independent Ethics Committee 
ICEC 
Independent Clinical Events Committee 
ICF 
informed consent form 
ICH 
International Conference of Harmonization 
iNO 
inhaled nitric oxide 
IPAH 
idiopathic pulmonary arterial hypertension 
IRB 
Institutional Review Board 

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Abbreviation or Specialist Term 
Explanation 
ITT 
intent-to-treat 
IRT 
Interactive Response Technology 
LPFV 
Last Patient First Visit 
LPLV 
Last Patient Last Visit 
LTOT 
long term oxygen therapy 
LVEDP 
left ventricular end diastolic pressure 
LVEF 
left ventricular ejection fraction 
LVSD 
left ventricular systolic dysfunction 
LVSF 
left ventricular shortening fraction 
M 
mean 
MedDRA 
Medical Dictionary for Regulatory Activities 
MetHgb 
methemoglobin 
ml 
milliliter 
N2 
nitrogen 
NO 
nitric oxide 
NT-proBNP 
N-terminal of the prohormone brain natriuretic peptide  
O2 
oxygen 
PAH 
pulmonary arterial hypertension 
PAP 
pulmonary arterial pressure 
PCWP 
pulmonary capillary wedge pressure 
PDE-5 
phosphodiesterase type-5 
PH 
pulmonary hypertension 
ppm 
parts per million 
PVR 
pulmonary vascular resistance 
RAP 
right atrial pressure 

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Abbreviation or Specialist Term 
Explanation 
RHC 
right heart catheterization 
RR 
respiratory rate 
SAE 
serious adverse event 
SpO2 
oxygen saturation by pulse oximeter 
SAP 
systemic artery pressure 
SAR 
serious adverse reaction 
SBP 
systolic blood pressure 
SC 
Steering Committee 
S/D 
Systolic/diastolic 
SD 
Standard Deviation 
SMQ 
standardized MedDRA queries 
sPAP 
systolic pulmonary artery pressure 
SVR 
systemic vascular resistance 
TLC 
total lung capacity 
TPR 
total pulmonary resistance 
TTCW 
time to clinical worsening 
WHO 
World Health Organization 

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5. 
INTRODUCTION 
This is a Phase 3, placebo controlled, double-blind, randomized, clinical study to determine 
safety, tolerability and efficacy of pulsed inhaled nitric oxide (iNO) versus placebo as add-on 
therapy in subjects with pulmonary arterial hypertension (PAH) who remain symptomatic on 
approved PAH monotherapy or combination approved PAH therapy and long term oxygen 
therapy (LTOT)(Part 1 and Part 2).  
Pulmonary arterial hypertension is a progressive disease characterized by progressive pulmonary 
vascular arteriopathy leading to elevation in pulmonary vascular resistance (PVR) and 
pulmonary arterial pressure (PAP) with right ventricular failure and death if untreated 
(McLaughlin 2009; Barst 2009; McGoon 2009; Badesch 2007). Additionally, many subjects die 
on monotherapy or combination approved PAH therapy. The overall current 5-year survival with 
current standard of care is only 60% (Benza 2010). The pathogenesis of PAH remains unclear, 
but an imbalance between vascular cell proliferation and apoptosis, an influx of cellular 
inflammation, excess vasoconstriction, and in situ thrombosis all appear to contribute to the 
narrowing or obliteration of the pulmonary arteriolar lumens resulting in increased PVR 
(McLaughlin 2009). Deficiencies in the vasodilator/anti-proliferative agents prostacyclin and 
nitric oxide have also been observed as well as increased production of the 
vasoconstrictor/proliferative agents endothelin-1 and thromboxane. 
There is no cure for PAH and the 5-year survival rate for idiopathic or heritable PAH was 
approximately 30% prior to the availability of targeted PAH therapies based on Registry data 
from the 1980s (Anderson 2010). However, in recent years, effective therapies targeting specific 
endothelial abnormalities have emerged. Currently approved treatments have been demonstrated 
to have both short- and long-term efficacy. These include: synthetic prostacyclin, i.e., 
epoprostenol, a prostacyclin analog, treprostinil or iloprost; an endothelin receptor antagonist 
(ERA), i.e., bosentan, ambrisentan, or macitentan; phosphodiesterase type-5 (PDE-5) inhibitors, 
i.e., sildenafil and tadalafil; and soluble guanylate cyclase (sGC) stimulators, i.e., riociguat 
(McLaughlin 2006; Barst 2009; McGoon 2009; Badesch 2007; Anderson 2010; Ghofrani 2013). 
These medications may improve symptoms, exercise capacity, and clinical outcome, but may be 
limited by either parenteral delivery system, the need for frequent laboratory monitoring, 
frequent dosing schedules, or unwanted side effects. Because of the availability of several agents 
working via different mechanisms, interest has developed in add on (i.e., combination) therapy. 
This strategy has proven successful in improving clinical outcomes in some subjects. Yet, as 
stated above, despite these significant advances in the treatment of PAH, the current 5-year 
survival for Group 1 PAH is ~60% utilizing the available approved PAH therapies (Anderson 
2010). Patients who are receiving prostacyclin therapy, ERA, and PDE-5, have no further 
treatment options other than atrial septostomy and lung transplantation. 
PAH is associated with impaired release of nitric oxide at least in part because of reduced 
expression of nitric oxide synthase in the vascular endothelium of pulmonary arteries 
(McLaughlin 2009; Barst 2009; McGoon 2009; Badesch 2007; Anderson 2010). Thus, chronic 
administration of iNO may be viewed as replacement therapy in some subjects with PAH making 
it a logical choice for clinical evaluation. 
 

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5.1. 
Pulsed Inhaled Nitric Oxide for Treatment of Long-Term Pulmonary 
Arterial Hypertension 
The effects of long-term administration of iNO to patients with PAH, chronic obstructive 
pulmonary disease (COPD), and idiopathic pulmonary fibrosis (IPF) have been published. 
Approximately 100 patients received iNO acutely, approximately 40 of whom continued to 
receive long-term iNO for up to 2 years (Ashutosh 2000, Channick 1996, Germann 1998, Perez-
Penate 2005, Perez-Penate 2008, Vonbank 2003, Yung 2001). Overall, review of the published 
medical literature and clinical experience indicates that iNO at doses of 0.013 to 0.1 mg/kg per 
hour for up to 2 years appears safe and suggests efficacy for the treatment of pulmonary 
hypertension (PH), including Pulmonary Hypertension Group 1. 
Inhaled NO offers an additional treatment option for patients, in particular patients who are 
already receiving prostacyclin therapy, ERA, and PDE-5, who have no other medical treatment 
options. Inhaled NO has the advantage of being able to be added to all other available PAH 
therapies with the exception of riociguat. The riociguat label excludes addition of NO donors 
because of the side effects of systemic hypotension. 
Bellerophon Pulse Technologies recently completed Part 1 of a Phase 2 clinical trial of 
iNO/INOpulse for PAH in the United States and Canada (Study IK-7001-PAH-201). The key 
inclusion criteria for subjects in this trial were:  pulmonary hypertension WHO Group I, on at 
least one other PAH medication for at least 12 weeks prior to treatment with iNO/INOpulse, and 
demonstrated ability to walk between 100 and 450 meters within 6 minutes. The Part 1 placebo-
controlled, double-blind clinical trial randomized 80 subjects in a 1:1:1 fashion to placebo or to 
one of two active iNO doses—25 or 75 mcg/kg IBW/hr for 16 weeks. Subjects who completed 
Part 1 of the trial were able to enroll in an open-label, long-term extension portion of the study 
(Part 2), in which all subjects received one of two doses iNO. The objective in Part 2 was to 
explore the long-term safety and tolerability of therapy.  
The primary endpoint of Part 1 was change in pulmonary vascular resistance (PVR) from 
baseline at 16 weeks, and the main secondary endpoint was change in placebo-adjusted 6-minute 
walk distance (6MWD) over the same period. The baseline characteristics seemed to indicate 
that subjects in the iNO groups had more severe disease. LTOT use at baseline was 78% and 
59% in the 75 and 25 mcg/kg IBW/hr cohorts, respectively, compared to 46% in the placebo 
cohort. Baseline PVR values were higher in the higher dose group, and 6MWDs were lower in 
the same group. The results in the ITT population showed a trend toward a lowering of PVR with 
iNO treatment and an increase in 6MWD, but this did not reach statistical significance. 
Adherence to therapy was widely variable. LTOT use was recorded at baseline, and subjects 
using LTOT at baseline were more adherent to using the investigational INOpulse delivery 
device (hereafter INOpulse device), defined retrospectively as an average use of ≥ 12 hours per 
day—specifically, subjects using LTOT had a rate of 71% adherence as compared with 32% 
adherence in those subjects not using LTOT. Based on this finding, we conducted post hoc, 
exploratory analyses of LTOT combined with iNO for ≥ 12 hours a day.  
 
 

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In the post-hoc, unplanned analyses, the subgroup of subjects who used the INOpulse device for 
an average ≥ 12 hours per day with LTOT (n = 35), showed a positive trend towards a decrease 
in PVR with 25 and 75 mcg/kg IBW/hr. There was a clinically meaningful improvement in 
6MWD in comparing the 75 mcg/kg IBW/hr dose group with the placebo group (52 ± 42 [mean 
± SD] vs. -17 ± 32 [mean ± SD]). There was on average a non-significant increase in 6MWD of 
26 meters in subjects treated with 25 mcg/kg IBW/hr. Improvements in 6MWD were the same 
for subjects treated with oral PAH therapies alone, and subjects with prostacyclin therapy plus 
therapy with either a PDE-5 or ERA. The results were similar to those subjects with inhaled 
iloprost where there was no significant change in PVR prior to inhalation of iloprost at EOS 
versus baseline, but a significant improvement in 6MWD (Olschewski 2002).      
Inhaled NO was relatively well-tolerated in Part 1 of the trial.  The SAEs were balanced between 
all 3 cohorts (reference Investigator Brochure for additional detail).    
Eighty-one percent of subjects elected to enter into the long-term extension trial. 
The results of Part 2 of the study demonstrated that pulsed iNO was well tolerated beyond the 
initial 16-week treatment period in Part 1. The incidence of Respiratory AEs and related 
Respiratory AEs in the Part 2 of the study were comparable in both the iNO 75 and iNO 25 
treatment groups.  No subjects had a MetHb level ≥7%. 
Subjects with LTOT are more likely to be compliant and may have better outcomes. In the Phase 
3 trial, recruitment will be limited to only subjects on LTOT. 
5.2. 
Inhaled Nitric Oxide 
Inhaled nitric oxide, a prescription pharmaceutical drug under the brand name of INOmax® 
(nitric oxide) for inhalation, is available commercially as a gaseous mixture of NO and nitrogen 
(N2). INOmax is approved and marketed by Ikaria Inc. (now owned by Mallinckrodt 
Pharmaceuticals) and The Linde Group in the US (December 1999), European Union (August 
2001) and other national authorities, for neonates (> 34 weeks old) with hypoxic respiratory 
failure associated with clinical or echocardiographic evidence of PH when used in conjunction 
with ventilatory support and other appropriate agents.  
Nitric oxide is a selective pulmonary vasodilator. The mechanism of NO-mediated vasodilation 
occurs via the activation of soluble guanylate cyclase, the production of cyclic guanosine 
monophosphate (cGMP), and subsequent relaxation of vascular smooth muscle. Inhaled NO 
produces pulmonary vasodilation and clearly does not affect systemic vascular beds by virtue of 
its high affinity for hemoglobin and rapid inactivation. In a number of animal species and under 
several vasoconstrictive stimuli, iNO produced rapid and effective pulmonary vasodilation at 
concentrations between 5 and 80 parts per million (ppm). Evaluations in the newborn lamb 
demonstrated that iNO selectively reverses hypoxic pulmonary vasoconstriction, with maximal 
pulmonary vasodilation produced by NO concentrations of 80 ppm. In an animal model of 
persistent PH of the newborn (PPHN), neonatal lambs displayed a marked and rapid pulmonary 
vasodilation that improved oxygenation at inhaled NO concentrations of 100 ppm. 
5.3. 
INOpulse Device 
For the indication of PAH, iNO is being developed as a drug/device combination therapy to be 
used with the INOpulse delivery device.  

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The INOpulse device is a complete, integrated system that uses a 0.074 liter aluminum cartridge 
containing a concentration of 6.0 mg/L (4880 ppm) of NO gas. The device is lightweight, 
portable, allowing NO to be administered via a nasal cannula to spontaneously breathing 
subjects. These features make it ideal for use in an ambulatory setting. The main advantage of 
the INOpulse device for spontaneously breathing subjects lies in its ability to deliver precise, 
preset NO doses over time, independent of the subject’s respiration rate and tidal volume. 
Prescribed doses of iNO are delivered through the INOpulse according to amount of drug per 
ideal body weight (IBW) per hour (i.e., mcg/kg IBW/hr). The iNO dose is pulsed over the first 
half of the subject’s inspiration rather than inhaled throughout the entire inspiratory period and 
the hourly set dose is accurately delivered throughout the hour. 

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6. 
OBJECTIVES  
Part 1 Blinded Treatment Period 
6.1. 
Primary Objective  
The primary objective in this study is to evaluate the efficacy of iNO on exercise using 6-minute 
walk distance (6MWD) in subjects with PAH currently receiving background PAH medication 
and LTOT. 
6.1.1. 
Secondary Objectives 
The secondary objectives in this study are: 
1. To evaluate the time to clinical worsening (TTCW)  
2. To evaluate change in World Health Organization (WHO) Functional Class 
6.1.2. 
Safety Objectives 
The safety objectives in this study are to evaluate the safety and tolerability of iNO. 
6.1.3. 
Tertiary Objectives  
The tertiary objectives in this study are: 
1. To evaluate changes in health-related quality of life using the Short Form-36 (SF-36) 
version 2 health survey 
2. To evaluate the impact of iNO on pulmonary hemodynamics in a subset of subjects  
3. To evaluate the changes in right ventricular (RV) and left ventricular (LV) function as 
measured by echocardiography, in a subset of subjects 
4. To evaluate change in N-terminal of the prohormone brain natriuretic peptide (NT-
proBNP) 
5. To evaluate change in Borg dyspnea score immediately following 6-minute walk test 
(6MWT) 
6. To evaluate change in 6MWD as related to degree of correlation between drug adherence 
and clinical efficacy measurement 
7. To evaluate subjects with unsatisfactory clinical response 
8. To evaluate the impact of iNO on frequency of heart-lung or lung transplantation, and 
deaths while awaiting transplantation  
9. To evaluate the impact of iNO on medical resource utilization 
 
  

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6.2. 
 Part 2 -Open Label Period: 
6.2.1. 
 Primary Objective: 
1. To Evaluate the long term safety and tolerability of iNO 
6.2.2. 
Secondary Objective: 
1. To evaluate the change in exercise tolerance in subjects who switch from placebo to active 
therapy 

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7. 
ENDPOINTS 
7.1. 
Part 1 Blinded Treatment Period  
7.1.1. 
Primary Endpoint 
The primary endpoint in this study is to assess the efficacy of iNO as measured by the placebo-
adjusted change in 6MWD from baseline to 18 weeks. 
7.1.2. 
Secondary Endpoints 
The secondary endpoints include:  
1. TTCW, the  time (in days) from start of treatment to first event (first day the event is 
noted), with iNO as compared to placebo, measured from baseline to 18 weeks . TTCW 
event is defined as any of the following:  
a. Death (all-cause mortality) 
b. Atrial septostomy 
c. Hospitalization due to worsening of PAH (adjudicated) 
d. Start of new specific PAH treatment (endothelin receptor antagonists [ERAs], 
phosphodiesterase type-5 [PDE-5] inhibitors or prostanoids), an increase in the dose 
of an ERA or PDE-5, increase in the dose or frequency of an inhaled prostanoids, or 
an increase in the dose of an intravenous or subcutaneous prostanoids by >10%. 
e. Decrease of >15% from baseline or >30% compared with the last study related 
measurement in 6MWD should be confirmed by a repeat measurement performed at 
least 14 days later 
f. Worsening of WHO Functional Class (e.g., from Class II to Class III or IV, OR 
Class III to Class IV); and should be confirmed by a repeat assessment at least 
14 days later  
2. Change in WHO Functional Class, with iNO as compared to placebo, from baseline to 
18 weeks 
7.1.3. 
Tertiary Endpoints 
The tertiary endpoints in this study include: 
1. Change in health-related quality of life (using SF-36 version 2 health survey), with iNO 
as compared to placebo, from baseline to 18 weeks  
2. Change in pulmonary hemodynamics (i.e., cardiac output [CO], cardiac index [CI], mean 
pulmonary artery pressure [mPAP], mean pulmonary capillary wedge pressure 
[mPCWP], systolic pulmonary artery pressure [sPAP], diastolic pulmonary artery 
pressure [dPAP], pulmonary vascular resistance [PVR], oxygen saturation by pulse 
oximeter [SpO2], mixed venous O2, and right atrial pressure [RAP]), measured by right 
heart catheterization (RHC), with iNO as compared to placebo, from baseline to 18 
weeks, in a subset of subjects (approximately 50), at selected sites  
3. Change in echocardiogram measurements right ventricular function (including right 
ventricular fractional area change, systolic pulmonary artery pressure [sPAP], tricuspid 

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annular motion/tricuspid annular plane systolic excursion, tricuspid annular systolic 
velocity, and Tei index) and left ventricular function (including left ventricular ejection 
fraction [LVEF], LV size, and improvement in LV early diastolic relaxation velocity), 
with iNO as compared to placebo, from baseline to 18 weeks, in a subset of subjects 
(approximately 50), at selected sites 
4. Change in NT-proBNP, with iNO as compared to placebo, from screening to 18 weeks 
5. Change in Borg dyspnea score immediately following 6MWT, with iNO as compared to 
placebo, from baseline to 18 weeks 
6. Change in 6MWD as related to degree of drug adherence, with iNO as compared to 
placebo, from baseline to 18 weeks  
7. The number of subjects with unsatisfactory clinical response, with iNO as compared to 
placebo, from baseline to 18 weeks. Defined as: WHO Functional Class III or IV 
symptoms with no improvement in 6MWD 
8. Number of subjects undergoing heart-lung or lung transplantation, number of subjects 
listed for transplantation, and deaths while awaiting transplantation, from baseline to 18 
weeks  
9. Medical resource utilization, with iNO as compared to placebo, from baseline to 18 
weeks  
7.1.4. 
Safety Endpoints 
The safety endpoints include:   
1. Incidence and severity of adverse events (AEs) 
2. Incidence of device malfunction and/or device failure leading to an AE 
3. Incidence of rebound pulmonary hypertension (PH) 
4. Clinically significant changes in:  
a. Clinical laboratory tests 
b. Pulmonary function tests 
c. Vital signs 
 
7.2. 
Part 2 Open Label Period: 
7.2.1 Primary Endpoint: 
1. The incidence of AEs and SAEs with long term therapy 
        
7.2.2    Secondary Endpoint: 
1. To evaluate the change in 6MWD in subjects who switch from placebo to active therapy 
at 4 months, 8 months and 12 months of therapy 

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8. 
STUDY DESIGN 
8.1. 
Overall Study Design 
This is a multi-center, randomized, double-blind, placebo-controlled, parallel-group design to 
determine the efficacy, safety and tolerability of pulsed iNO versus placebo in symptomatic 
subjects with PAH currently receiving background PAH medication and LTOT. 
All subjects will be treated by means of a blinded INOpulse delivery device. The device 
measures daily exposure (minutes per day in use, measured as breath detection).  
The study consists of two parts Part 1, the Blinded Treatment Period, and Part 2, the Open Label 
Extension Period. After the Screening period, the subjects will be randomized at Week 0 then 
enter a double-blind, Run-in period (Week 0 to Week 2) to assess their eligibility to continue in 
the study by their usage of the INOpulse device for an average ≥ 12 hours (rounded to the nearest 
hour) per day with no more than 2 days of usage < 8 hours per day. All subjects will be analyzed 
for safety during this Run-in period. Those subjects not meeting the 12 hour INOpulse device 
usage requirement (by Week 2) will be discontinued and ineligible to proceed to the next phase 
of treatment. Subjects meeting the device usage requirement, and all Inclusion/Exclusion 
criterion (by Week 2), will qualify to enter into the next phase of treatment.  
Subjects who are unable to meet enrollment criteria during the Run-in period may be rescreened 
at the discretion of the Sponsor. 
Subjects will be randomized to a treatment assignment as described in Table 1 below. Subjects 
randomized to active iNO will receive a reduced dose of iNO during run in and subjects 
randomized to placebo will receive placebo during run in. 
At Baseline, all subjects will be stratified for prostanoids usage.  
LTOT flow rates should be kept constant throughout the study unless the subject has persistent 
desaturations to less than 88% of SpO2, or otherwise clinically indicated. LTOT flow rate with 
the estimated length of use per day must be documented in the eCRF at all visits. Subjects will 
be encouraged to use their oxygen during the day and night as prescribed by their treating 
physician. All 6MWTs will be performed while subjects are receiving oxygen and carrying the 
INOpulse device (including baseline assessments). 
Additional specific PAH therapies may be added only for evidence of clinical worsening due to 
PAH as defined in the protocol throughout the trial.     
Subjects will remain in the study and continue to receive blinded treatment according to their 
randomization for an additional 16 weeks for a total of 18 weeks.  
Part 2-Open Label Period -Subjects will be offered open label therapy when a subject 
completes 18 weeks of blinded drug therapy. 
Subjects will be given the opportunity continue in Part 2 Open Label Treatment and will receive 
iNO at 75 mcg/kg IBW/hr with the INOpulse delivery device until the drug-device 
investigational product is approved and available as a marketed product or the Sponsor decides 
to discontinue development of iNO for PAH.  

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8.2. 
Treatment Assignment 
Subjects who meet all enrollment criteria during the Screening period will be randomized in a 
1:1 ratio into one of two dosing cohorts as presented in Table 1. Ninety-four subjects will be 
enrolled in each cohort. 
Table 1: 
Dosing Assignments for Run-in and Treatment Periods  
 
Part 1  
Blinded Treatment Period 
Part 2 
Open Label Period 
 
Cohort 
Run-in Period 
Week 0 to Week 2 
Treatment Period 
Week 3 to Week 18  
Open Label Treatment 
Cohort 1: Placebo 
Placebo at a dose 
setting of  
15 mcg/kg IBW/hr 
Placebo at a dose setting of  
75 mcg/kg IBW/hr 
iNO 75 mcg/kg IBW/hr 
Cohort 2: iNO 75 
mcg/kg IBW/hr 
iNO 15 mcg/kg 
IBW/hr 
iNO 75 mcg/kg IBW/hr 
iNO 75 mcg/kg IBW/hr 
Note:  Study drug is dosed according to IBW and not actual body weight. IBW is determined by a subject’s gender 
and height, and therefore will not change during the study period. 

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A study flow diagram is presented in Figure 1. 
Figure 1: 
Study Design 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
*All subjects during the Run-in period must be willing to comply with usage of INOpulse device for ≥ 12 hours 
(rounded to the nearest hour) per day, with no more than 2 days of usage < 8 hours per day. Subjects randomized 
to iNO will receive 15 mcg/kg IBW/hr for the first 2 weeks (Run-in phase) followed by iNO at 75 mcg/kg IBW/hr 
dose for the Treatment Period. Subjects randomized to Placebo will receive Placebo product 15 mcg/kg IBW/hr at 
a delivery setting matching the treatment groups. 
Screening/Baseline/Randomization 
Blinded Run-in Period*  
Within 28 days of Screening 
Part 1 
Placebo at a dose 
setting of 15 mcg/kg 
IBW/hr 
Part 1 
iNO 
15 mcg/kg IBW/hr 
Blinded Treatment Period 
Week 3 to Week 18  
Placebo at a dose 
setting of 75 mcg/kg 
IBW/hr 
iNO 
75 mcg/kg IBW/hr 
Part 2 Open Label Treatment Period 
iNO 75 mcg/kg IBW/hr 

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8.3. 
Study Design Rationale 
The proposed study design allows for determination of whether iNO at a dose of 75 mcg/kg 
IBW/hr delivered via the INOpulse delivery device for up to 24 hours per day demonstrates 
efficacy of iNO in subjects with PAH concomitantly using approved PAH specific medication 
and LTOT. The primary endpoint will be change in 6MWD at 18 weeks, but a key secondary 
endpoint will be TTCW. Subjects, Investigators, and Sponsor will remain blinded to treatment 
until the last subject’s completion of treatment at 18 weeks.  
To ensure compliance with device usage, a double-blind, Run-in period (Week 0 to Week 2) will 
assess subject eligibility to continue in the study by their usage of the INOpulse device for an 
average ≥ 12 hours (as described in Section 8.1). Subjects will be randomized to placebo or iNO 
at 15 mcg/kg IBW/hr. The 15 mcg/kg IBW/hr dose is considered an ineffective dose. Use of low 
dose NO during the Run-in period is intended to avoid potential unblinding when the subject 
enters the treatment phase due to potential difference in smell. 

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9. 
STUDY POPULATION 
9.1. 
Population 
In accordance with inclusion criteria, the study population will consist of subjects 18 to 85 years 
of age with a confirmed diagnosis of PAH, confirmed by RHC within the previous 5 years.  
9.2. 
Number of Subjects to be Studied 
A total of 188 subjects (94 per dosing cohort) will be randomized to achieve 150 completed 
subjects.  Total randomized will be higher to account for an anticipated 20% drop out rate.  
9.3. 
Inclusion Criteria 
Part 1 Blinded Treatment Period 
Subjects must meet all of the following inclusion criteria to be enrolled and eligible to participate 
in the study.  
1. Signed Informed Consent Form prior to the initiation of any study mandated procedures 
or assessments 
2. A confirmed diagnosis of PAH Group 1 who have either idiopathic PAH (IPAH), 
heritable PAH, drug and toxin-induced PAH, associated PAH (APAH) with connective 
tissue disease (CTD), APAH with congenital heart disease (unrepaired or repaired at least 
1 year prior to Screening), APAH with human immunodeficiency virus (HIV), or APAH 
with portal hypertension 
3. Subjects receiving at least one PAH specific therapy (ERA or PDE-5 inhibitor, or 
inhaled, subcutaneous, or intravenous prostacyclin or a prostacyclin analog) with the 
same type of therapy for at least 3 months with stable dosing 4 weeks prior to Screening. 
(Subjects should be receiving optimal therapy according to the disease severity) 
4. Subjects using oxygen therapy by nasal cannula for at least 4 weeks prior to Screening 
5. PAH diagnosis confirmed by RHC within the previous 5 years, according to the 
following definitions:   
• PVR ≥ 400 dynes.sec.cm-5 (5 Wood units)  
• mPAP ≥ 25 mmHg  
• PCWP or LVEDP ≤ 15 mmHg 
• Subjects who otherwise meet all the inclusion criteria and none of the exclusion 
criteria but have not undergone a RHC within the previous 5 years may be 
considered eligible for the study if they undergo a RHC and then meet the 
pulmonary hemodynamics criterion 
6. 6MWD ≥ 100 meters and ≤ 450 meters prior to randomization 
7. WHO Functional Class II-IV. Subjects with WHO Functional Class IV should be treated 
with prostacyclin or a prostacyclin analog (subcutaneous or intravenous), plus at least one 

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additional PAH specific therapy (ERA or PDE-5), if available to the subject and 
reimbursed by health insurance  
8. Age between 18 and 85 years (inclusive) 
9. Willingness to use INOpulse delivery device for at least 12 hours per day 
10. Willingness to continue on study drug until the subject has completed Week 18 
assessments (EOS) 
11. Female subjects of childbearing potential must have a negative pre-treatment pregnancy 
test (serum or urine). All female subjects should take adequate precaution to avoid 
pregnancy.   
9.4. 
Exclusion Criteria 
Exclusion criterion in this study includes the following: 
1. Subjects with known HIV infection who have a history within the past 3 months of any 
opportunistic pulmonary disease (e.g., tuberculosis, Pneumocystis carinii pneumonia, or 
other pneumonias) at the time of Screening 
2. PAH associated with, untreated thyroid disorders, glycogen storage disease, Gaucher’s 
disease, hereditary hemorrhagic telangiectasia, hemoglobinopathies, myeloproliferative 
disorders or splenectomy 
3. Subjects with pulmonary conditions that may contribute to PAH including, but not 
limited to, chronic bronchiectasis, cystic fibrosis, or other pulmonary condition that the 
Investigator may deem to contribute to the severity of the disease or impair the delivery 
of iNO due to airway disease 
4. Subjects receiving riociguat   
5. Subjects receiving oral prostanoids as monotherapy 
6. PAH associated with significant venous or capillary involvement, known or suspected 
pulmonary veno-occlusive disease, or pulmonary capillary hemangiomatosis 
7. Any subject with WHO PH Groups 2, 3, 4 or 5 
8. Subjects with any of the following cardiac abnormalities: 
a. Underlying cardiomyopathy or clinically significant aortic or mitral valve disease in 
the opinion of the investigator 
b. Left ventricular systolic dysfunction (LVSD), i.e., left ventricular ejection fraction 
(LVEF) < 40% or left ventricular shortening fraction (LVSF) < 22%, as determined 
by local reading 
c. Current symptomatic coronary artery disease, myocardial infarction within 1 year, or 
any coronary artery interventions within 6 months 
9. Systemic hypertension defined as systolic blood pressure (SBP) > 160 mmHg and/or 
diastolic blood pressure (DBP) > 100 mmHg persistent at Screening after a period of rest 
(treated or untreated) 

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10. Subjects with a history of deep vein thrombosis, pulmonary embolism/infarction or 
prothrombotic disorder must have had chronic thromboembolic pulmonary hypertension 
(CTEPH) excluded by ventilation/perfusion lung (V/Q) scan  
11. Severe obstructive lung disease defined as both a forced expiratory volume in 1 
second/forced vital capacity (FEV1/FVC) < 70% and FEV1 < 55% of predicted value  
12. Moderate to severe restrictive lung disease: total lung capacity (TLC) < 60% of 
predicted; if TLC 60% to 70% predicted, a high resolution CT scan showing diffuse 
disease or more than mild patchy disease  
13. Any subject who develops or has developed a PCWP > 20 mmHg during acute 
vasodilator testing (AVT) 
14. Systemic hypotension defined as SBP < 90 mmHg persistent at Screening after a period 
of rest 
15. Moderate to severe hepatic impairment, i.e., Child-Pugh Class B or C 
16. On dialysis 
17. Acute or chronic physical impairment (other than dyspnea due to PAH) that would limit 
the ability to comply with study procedures or adherence to therapy (i.e., 6MWT), 
including carrying and wearing the pulsed delivery device per study protocol, or medical 
problem(s) likely to preclude completion of the study 
18. Pregnant or breastfeeding females at Screening 
19. Administered L-arginine within 1 month prior to Screening 
20. Known concomitant life-threatening disease with a life expectancy less than 1 year 
21. Atrial septostomy within 3 months preceding randomization 
22.  The concurrent use of the INOpulse device with a continuous positive airway pressure 
(CPAP), Bilevel positive airway presure BiPAP, or any other positive pressure device.  
23. Use of investigational drugs or devices within 1 month prior to Screening (other than 
acute vasodilator testing with iNO) 
24. Any underlying medical or psychiatric condition that, in the opinion of the Investigator, 
makes the subject an unsuitable candidate for the study 
25. Any subject who has been enrolled in any previous clinical study with inhaled NO 
administered through pulse delivery. 
 
 
Additional Criteria to Continue to Treatment Phase from Run-in period (Week 0 to 
Week 2) 
1. Subjects must demonstrate an average daily usage of the INOpulse device of ≥ 12 hours 
(rounded to the nearest hour) with no more than 2 days of usage < 8 hours per day, during 
the initial 2 weeks of study. 

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2. If a subject experiences clinical worsening during the Screening or Run-in period, the 
subject will not be eligible to enter into the treatment phase of the study.  
3. Subjects who have been randomized at baseline and found not to meet all Inclusion 
criteria and/or who meet Exclusion criteria during the Run-in period will be withdrawn 
from the study, these subjects will be replaced to meet total target enrollment. 
 
Part 2 Open Label Period: 
Diagnosis and main criteria for inclusion and exclusion: 
Inclusion Criteria Part 2: 
1.  Informed Consent Form prior to the initiation of any study mandated procedures or 
assessments 
2. Subject must have completed 18 weeks of blinded therapy and all assessments at 
week 18 
3. In the opinion of the Investigator open label treatment is in the best interest of the 
subject after one year of blinded treatment is completed or at the time the last patient 
is randomized 
Exclusion Criteria Part 2 Open Label Period: 
1. Subject has initiated therapy with riociguat 
 
 
 

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10. 
SUBJECT DISCONTINUATION, WITHDRAWAL AND 
TERMINATION FROM THE STUDY, SUBJECT 
REPLACEMENT, AND PROTOCOL DEVIATION CRITERIA 
10.1. 
Subject Discontinuation from Study Drug/Device 
Any subject who is discontinued from the study drug will be encouraged to perform all 
procedures and assessments as appropriate until week 18. Vital status will be determined at the 
EOS on all subjects who prematurely discontinue. The specific reason for discontinuation will be 
documented in the eCRF. Subjects may be discontinued due to the following:  
1. In the opinion of the Investigator, it is in the subject’s best interests to discontinue study 
drug.  
2. Subject no longer wishes to continue using the drug/device. 
3. A subject becomes pregnant.  
4. In the opinion of the Investigator, the subject experiences clinically significant rebound 
PH temporally associated with acute withdrawal of study drug. 
5. If a subject experiences any of the following:  death, atrial septostomy, lung or heart-lung 
transplantation. 
10.2. 
Subject Withdrawal from Study  
Subjects may be considered withdrawn from the study if they meet the following criteria. If the 
subject does not wish to continue study assessments, every effort should be made to obtain 
consent for contact of the subject, or the subject’s family member or friends, to establish 
vital status at EOS. 
• Subjects have the right to withdraw consent at any time and for any reason without 
prejudice to his/her future medical care by the physician or the institution. The specific 
reason for subject withdrawal of consent will be documented in the eCRF. 
10.2.1. 
Subject Withdrawal During Run-In Period 
1. Subjects who have been randomized during the Run-in period and found not to meet 
Inclusion criteria and/or meet Exclusion criteria (at Week 2), will be withdrawn from the 
study. Additional subjects will be enrolled to meet total target enrollment. 
2. Subjects who do not demonstrate an average daily usage of the INOpulse device of ≥ 12 
hours (rounded to the nearest hour), or who have more than 2 days of usage < 8 hours per 
day during the initial 2 weeks of study, will be withdrawn. Additional subjects will be 
enrolled to meet total target enrollment. 
3. Subjects who have clinical worsening of PAH during the Run-in period will be 
withdrawn. Additional subjects will be enrolled to meet total target enrollment. 

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10.3. 
Subjects Lost to Follow-Up 
Subjects who do not complete their scheduled visits, have not died, and have not officially 
withdrawn from the study are considered lost to follow-up. Site personnel should make every 
reasonable effort to locate and communicate with the subject using all available methods (e.g., 
telephone, email, certified letter, in-person contact) requesting the subject contact the Study 
Coordinator or Principal Investigator. Attempts to locate subjects must begin immediately after a 
missed visit; delays in locating the subject increase the chance of the subject becoming lost to 
follow-up. 
Attempts to contact the subject should be documented in the subject’s medical records and 
documented in the eCRF. 
The following contact procedure is recommended at each time point: 
• A minimum of 2 telephone calls on different days over the specified follow-up 
windows should be recorded in the source documentation including date, time, and 
site personnel initials attempting to contact the subject. 
• If these attempts are unsuccessful, a certified letter (or similar) should be sent to the 
subject (or other method of confirming notification that a letter was delivered). 
• All efforts should be made to obtain the vital status at EOS, including public 
information sources. 
• An independent vendor may be used to assist in location of lost to follow-up subjects 
and establishment of vital status, if needed. 
10.4. 
Interruption of Study Drug 
Any study drug interruptions of > 24 consecutive hours during the treatment phase will be 
recorded in the IRT. The reason for study drug interruption or premature discontinuation of study 
drug must be documented in the IRT, including discontinuation for hospitalization. If there is any 
interruption of study drug, subjects should be encouraged to return to treatment as soon as 
possible.   
10.5. 
Study Termination Criteria 
The study may be terminated for any of the following reasons: 
1. The local health authority requests a termination of the study. 
2. It is determined that the risk level associated with the study drug/device combination 
therapy is significant and warrants termination of the study. 
3. The Sponsor decides to terminate the study. 
10.6. 
Deviations from the Protocol 
A protocol deviation is defined as an event where the clinical Investigator or site personnel did 
not conduct the study according to the protocol or the Investigator Agreement. No deviations 
from the protocol should be initiated, except when necessary to eliminate immediate hazards to 
subjects (E6 ICH). 

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11. 
STUDY SCHEDULE OF ASSESSMENTS  
Enrolled subjects will be required to complete a minimum of 7 study visits (Screening, Baseline 
[Week 0], Weeks 2, 6, 10, 14, and 18, or until the subject is withdrawn or discontinues from the 
study. Subjects who discontinue study drug will be encouraged to complete all scheduled study 
assessments through week 18. 
Pre-Screening and Screening Logs will be maintained in IRT for all subjects who do not meet 
study criteria and for subjects who meet all criteria but do not elect to be enrolled. The Screening 
Log will contain the site location, subject’s demographic data (age, sex), the date subject was 
seen in the office or clinic, if the subject did or did not meet Inclusion and Exclusion criteria, and 
if the subject declined enrollment (i.e., did not consent to participate in the study).  
Part 1 Screening Visit the following assessments will be performed: 
• Informed Consent 
• Inclusion/Exclusion 
• Medical History 
• Prior and concomitant medications 
• WHO Functional Class 
• 6 Minute Walk Test 
Note: Screening 6MWT may be obtained at baseline if the subject is known to have a 
6MWD ≥ 100 meters and ≤ 450 meters.  
• Borg Dyspnea Scale  
• Vital Signs including HR, RR, BP and temperature.  SpO2 and methemoglobin via pulse 
oximetry (O2 flow rate) 
• Total Lung Capacity (only if not performed within 6 months of screening visit) 
• Spirometry including DLCO 
• Physical Examination including height and weight 
• Hematology and Chemistry including pregnancy test (serum or urine) 
• BioMarker – NT-proBNP 
• Medical Resource Utilization – the number of emergency room and outpatient visits 
made in the past year 
• Lung Transplant Listing Status 
• RHC will be conducted at Screening for subjects who meet all other inclusion exclusion 
criteria, are not participating in the sub-study, and who have not had a RHC within the 
previous 5 years 
 
 
 
 
 
 
 

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Baseline Visit, Week 0, the following assessments will be performed: 
• Prior and concomitant medications 
• WHO Functional Class 
• 6 Minute Walk Test (only if not performed at screening visit) 
• Vital Signs including HR, RR, BP and temperature.  SpO2 via pulse oximetry (O2 flow 
rate) 
• 
Randomization 
• 
Echocardiogram all subjects 
• 
Complete SF-36 
• 
Assess AEs,  SAEs, AESI’s 
• 
Medical Resource Utilization 
• 
Lung Transplantation listing status 
• 
Survival Status 
• 
RHC prior to randomization for subjects participating in the RHC substudy 
• 
Drug Device Dispensation 
Instruct and train the subject in the use, maintenance and storage of the following 
study items: the study drug, study device, and smartphone with its application (app). 
This will include reviewing the INOpulse instruction guide that explains, step-by-
step, how to use the study drug and device, how to care for the study device, how to 
properly store the study materials and equipment, what to do if there are any 
problems with the study materials, and whom to contact if the subject has questions. 
In addition, the subject will be given instructions on how to use the smartphone and 
its app in order to acknowledge receipt of study materials and scan the study drug 
used each day. 
After the subject is trained on how to use the study drug and device, the study drug 
will be started while the subject is in the hospital/clinic. 
• Evaluation for symptomatic Rebound Hypertension after start of study drug and prior to 
sending the subject home as described in Section 11.1.15. 
The study drug will be given while under medical supervision for 1 hour, the study drug 
will be stopped for 1 hour to make sure the subject does not have any symptoms of 
rebound pulmonary hypertension before going home. Rebound pulmonary hypertension 
may occur when inhaled nitric oxide is stopped suddenly. 
The subject will be sent home with the working device and breathing the study drug. From that 
time to the end of the subject’s participation in the study, they should wear the device and 
breathe the study drug as much as possible for up to 24 hours per day with some exceptions 
(while taking a shower, changing clothes, etc.). Using the study drug/device for as close to 24 
hours per day will likely result in the best chance for the optimal effect. The subject will need to 
agree to use the study device for at least 12 hours each day until the end of the study. The subject 
will leave the baseline visit with a 1-week supply of study drug. An additional week’s supply of 
study drug will be delivered to the subject’s home. 
 
 

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Part 1 Week 2 Visit the following assessments will be performed: 
• Prior and concomitant medications 
• WHO Functional Class 
• Conduct two 6 Minute Walk Tests (the average of the two 6MWD at Week 2 after run-in 
will be used as the baseline value) 
• Borg Dyspnea scale 
• Vital Signs including HR, RR, BP and temperature.  SpO2 and methemoglobin via pulse 
oximetry (O2 flow rate) 
• 
Assess AEs,  SAEs, AESIs 
• 
Medical Resource Utilization 
• 
Lung Transplantation listing status 
• 
Survival assessment 
• 
Completion of the SF-36   
• 
Drug Device Dispensation 
• 
Review Drug Device Usage 
• 
Evaluation for symptomatic Rebound Hypertension while under medical supervision, 
after start of study drug and prior to sending the subject home as described in section 
11.1.15 
If the subject does not use the device for an average of at least 12 hours a day, the 
subject may not be eligible to continue to participate in the study.  
If the subject continues to participate, at this visit the subject will be dispensed a 1 week 
supply of study drug.  Additional supplies will be delivered directly to the subject’s home.  
The used cartridges must be returned and will be picked up from the subject’s home when the 
new supplies are delivered. 
 
Part 1 Week 6 (Month 1), Week 10 (Month 2), Week 14 (Month 3) and Week 18 (Month 4) 
- the following assessments will be performed: 
• Prior and concomitant medications 
• WHO Functional Class 
• Conduct 6 Minute Walk Test 
• Borg Dyspnea scale 
• Vital Signs including HR, RR, BP and temperature.  SpO2 via pulse oximetry (O2 flow 
rate) 
• 
Complete SF-36 (week 18) 
• 
Assess AEs,  SAEs, AESIs 
• 
Medical Resource Utilization 
• 
Lung Transplantation listing status 
• 
Drug Device Dispensation (via home delivery) 
• 
Review Drug Device Usage 
• 
Spirometry testing including DLCO (week 18) 
• 
Physical examination (week 18) 
• 
Laboratory – Hematology  and Chemistry (week 18) 
• 
NT-proBNP (week 18) 

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• 
Pregnancy test (week 18) 
• 
Methemoglobin (week 6) 
• INOpulse Questionnaire (week 18) 
• 
RHC subjects participating in the substudy (week 18) 
• ECHO – subjects participating in the substudy (week 10 and 18) 
• 
Survival status 
• 
All blinded drug cartridges from Part 1 of the study must be returned to the site or 
Sponsor prior to dispensing open-label drug cartridges for Part 2.    
 
Part 1 Early Term:  The following visit assessments will be performed: 
• Prior and concomitant medications 
• WHO Functional Class 
• Conduct 6 Minute Walk Tests  
• Borg Dyspnea scale 
• Vital Signs including HR, RR, BP and temperature.  SpO2 and methemoglobin via pulse 
oximetry (O2 flow rate) 
• 
Complete SF-36 
• 
Assess AEs,  SAEs, AESIs 
• 
Medical Resource Utilization 
• 
Lung Transplantation listing status 
• 
Review Drug Device Usage 
• 
Spirometry testing including DLCO  
• 
RHC for subjects participating in substudy 
• 
ECHO (for safety assessment) for ALL subjects including those not participating in 
ECHO substudy 
• 
Physical examination  
• 
Laboratory – Hematology  and Chemistry 
• 
Methemoglobin 
• 
Pregnancy test 
• 
Survival status 
• 
All blinded drug cartridges from Part 1 of the study must be returned to the site or 
Sponsor.  
 
Assessments Part 2  
Part 2 Week 0 Visit: The following Assessments will be performed: 
• Informed Consent 
• Methemoglobin via pulse oximetry (O2 flow rate) 
• 
Drug Device Dispensation for Open Label treatment 
o If the subject continues to participate, at this visit the subject will be dispensed a 1 
week supply of study drug.  Additional supplies will be delivered directly to the 
subject’s home every 4 weeks.  The used cartridges must be returned and will be 
picked up from the subject’s home when the new supplies are delivered. 

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x 
Pregnancy test (at the discretion of the investigator) 
x 
Evaluation for symptomatic Rebound Hypertension while under medical supervision, 
after start of study drug and prior to sending the subject home as described in section 
11.1.15
Part 2 Week 2 Visit is a Telephone Visit: 
Study Staff will contact the subject via telephone call and the following assessments will be 
completed: 
x
Review of prior and concomitant medications
x Assessment of AE,SAEs, AESI 
 
Part 2:  Week 16, Week 32, and Week 52 Visits - the following assessments will be 
performed: 
x Prior and concomitant medications 
x WHO Functional Class 
x Conduct 6 Minute Walk Test 
x Borg Dyspnea Scale 
x Laboratory – Hematology and Chemistry (Week 52 only) 
x Pregnancy test (at the discretion of the Investigator) 
x Vital Signs including HR, RR, BP and temperature.  SpO2 and methemoglobin (Week 52 
only) via pulse oximetry (O2 flow rate) 
x 
Assess AEs, SAEs. AESIs 
x 
Drug Device Dispensation (every 4 weeks via home delivery) 
x 
Review Drug Device Usage 
x 
Evaluation for symptomatic Rebound Hypertension while under medical supervision, 
after start of study drug and prior to sending the subject home as described in section 
11.1.15
Part 2: Every 4 Month Visits:  The following assessments will be performed: 
x Prior and concomitant medications 
x Assessment of AEs, SAEs, AESI 
x Vital signs: BP and HR, SpO2 and methemoglobin via pulse oximetry (annually) 
x 
Review device usage with the subject 
x 
Laboratory – Hematology  and Chemistry will be conducted on a yearly basis (Pregnancy 
testing will be left to the discretion of the Investigator) 
x 
Drug Device Dispensation (every 4 weeks via home delivery) 
Part 2: End of Study (EOS) or Early Discontinuation- The following assessments will be 
performed: 
x Prior and concomitant medications 
section
11.1.15

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• Assessment of AEs, SAEs, AESI 
• Vital signs: BP and HR, SpO2 and methemoglobin via pulse oximetry. 
• 
Review device usage with the subject 
• 
Laboratory – Hematology  and Chemistry (pregnancy testing will be left to the discretion 
of the Investigator) 
• 
Final Drug Device Usage download 
 
Table 2 Presents the Schedule of Assessments to be performed for Parts 1 & 2. 
Table 2: Part 1 : Schedule of Assessments    
 
Screening 
Run in 
Blinded Treatment Period 
Assessment 
Screening 
Baseline 
Week 0 
Within 28 
days of 
screening 
visit 
Week 2 
(±3 days) 
Week 6 
Month 1 
(± 7 days) 
 
Week 
10 
Month 
2 
(±7 days) 
 
Week 14 
Month 3 
(± 7 days) 
 
Week 
18 
Month 
4 
(±7 days) 
Early D/C 
Informed Consent  
X 
 
 
 
 
 
 
 
Inclusion/Exclusion 
Criteria              
X 
 
 
 
 
 
 
 
Medical History 
X 
 
 
 
 
 
 
 
Prior and 
Concomitant 
Medications 
X 
X 
X 
X 
X 
X 
X 
X 
WHO Functional 
Class 
X 
X 
X 
X 
X 
X 
X 
X 
6 Minute Walk Test  
X 
Xa 
Xa 
X 
X 
X 
X 
X 
Borg Dyspnea Score, 
Heart Rate and SpO2 
X 
 
X 
X 
X 
X 
X 
X 
Vital Sign 
Measurements 
(includes SpO2 via 
pulse oximetry)  
X 
X 
X 
X 
X 
X 
X 
X 
Total Lung Capacity 
(TLC) 
Xb 
 
 
 
 
 
 
 
Spirometry Testing 
(and DLCO) 
Xc 
 
 
 
 
 
X 
X 
Physical Examination 
Xd 
 
 
 
 
 
X 
X 
Pregnancy test 
X 
 
 
 
 
 
X 
X 
MetHgb 
X 
 
X 
X 
 
 
 
X 

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Hematology, 
Chemistry  
X 
 
 
 
 
 
X 
X 
NT-proBNP 
X 
 
 
 
 
 
X 
 
Eligibility for 
INOpulse (average 
daily use ≥ 12 hr/day) 
 
 
Xh 
 
 
 
 
 
Randomization 
 
X 
 
 
 
 
 
 
Right Heart 
Catheterization 
(subset of ~50 subjects) 
 
X 
 
 
 
 
X 
Xi 
Right Heart 
Catheterization (all 
subjects not enrolled in 
subset) 
Xj 
 
 
 
 
 
 
 
Echocardiogram for 
central reading 
(subset of ~50 subjects) 
 
X 
 
 
X 
 
X 
Xi 
Echocardiogram for 
local reading only (all 
subjects not enrolled in 
subset) 
 
X 
 
 
 
 
 
Xi 
Evaluation for 
Symptomatic 
Rebound PH 
 
Xk 
X 
 
 
 
 
 
Patient Reported 
Outcomes (SF-36) 
 
X 
 
 
 
 
X 
X 
AEs/SAEs/AESIs 
 
X 
X 
X 
X 
X 
X 
X 
Drug Dispensing 
for Run-in period 
 
Xl 
 
 
 
 
 
 
Drug Dispensing 
for blinded 
treatment period 
 
 
Xl 
Xl 
Xl 
Xl 
 
 
Drug/Device 
Usagen 
 
 
Xn 
Xn 
Xn 
Xn 
Xn 
Xn 
INOpulse 
Questionnaire 
 
 
 
 
 
 
Xm 
X 
Survival 
Assessment 
 
X 
X 
X 
X 
X 
X 
X 
Medical Resource 
Utilization 
X 
X 
X 
X 
X 
X 
X 
X 
Lung 
Transplantation 
Listing Status 
X 
X 
X 
X 
X 
X 
X 
X 

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a Screening 6MWT may be obtained at baseline if the subject is known to have a 6MWD ≥ 100 meters 
and ≤ 450 meters. The average of the two 6MWD at Week 2 after run-in will be used as the baseline 
value 
b Total lung capacity test to be done if not performed within 6 months of Screening. 
c DLCO (diffusing capacity for the lungs measured using carbon monoxide). 
d Height and weight to be performed at Screening. 
e N/A-Footnote no longer applicable as of Amendment # 
f Pregnancy testing to be performed at the discretion of the Investigator. 
g N/A-Footnote no longer applicable as of Amendment #3  
h Subjects will be required to demonstrate an average daily usage ≥ 12 hours (rounded to the nearest hour) 
with no more than 2 days of usage < 8 hours per day of the INOpulse device during the initial 2 weeks 
of the study in order to be eligible to continue to the treatment phase. 
i RHC should be obtained at early discontinuation only for subjects participating in RHC substudies  
ECHO should be obtained for all subjects at early discontinuation regardless if they are participating in 
the ECHO substudy. 
j A RHC will be conducted at Screening for subjects who are not included in this subset who have not had 
a RHC within the previous 5 years that meet eligibility criteria and are otherwise eligible. See 
Section 11.1.13 for full RHC assessments. 
 k After randomization at Week 0 and at end of Run-in, Week 2, all subjects will remain in the hospital or 
clinic under medical supervision for 1 hour after starting study drug and for 1 hour after study drug is 
discontinued for observation for signs and symptoms of rebound PH. Vital signs, including heart rate, 
respiratory rate, blood pressure, and SpO2 will be recorded in the supine position every 15 minutes for 1 
hour, and then again every 15 minutes for another hour after discontinuation of study drug. After the 1 
hour observation period off study drug, if the subject’s status is unchanged with respect to vital signs 
and symptoms and subject does not exhibit signs or symptoms of rebound PH, they will restart their 
blinded study drug treatment and be sent home. 
l  One week of drug dispensed to site at Baseline and Week 2; all other drug dispensed to subject’s home 
via home delivery 
m At Week 18 or prior to study discontinuation 
n Site personnel should review INOpulse use with the subjects during study visits to encourage use as 
close to 24 hours per day as possible.  Reasons for device interruptions should also be reviewed with the 
subject.   
 
 
 

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Table 2 Part 2 Assessment Table: 
 
Part 2 
 
 
Open-Label Long Term Extension Period 
Assessment 
Week 0 
If subject 
enters Part 2, 
Week 0 
assessments 
are done at 
Week 18 of 
Part 1 
 
Week 2 
+/- 3 days 
(phone call) 
 
Week 16 
Month 4 
+/-14 days 
 
Week 32 
Month 8 
+/-14 days 
 
Week 52 
Month 12 
+/-14 days 
 
Every 4 
Months until 
EOS 
+/-14 days 
 
EOS ( or 
Early D/C 
Informed 
Consent  
X1 
  
 
 
 
  
  
Inclusion/Exclusi
on Criteria              
X2 
  
 
 
 
  
  
Review of Prior 
and Concomitant 
Medications 
X 
X 
X 
X 
X 
X 
WHO Functional 
Class 
X 
X 
X 
6 Minute Walk 
Test  
X 
X 
X 
Borg Dyspnea 
Score, Heart Rate 
and SpO2 
  
X 
X 
X 
Vital Sign 
Measurements 
(includes SpO2 
via pulse 
oximetry)  
X 
X 
X 
X 
X 
Telephone 
contact 
  
X 
 
 
 
  
  
Pregnancy test 
X4 
 
X4 
X4 
X4 
X4 
 X4 
MetHgb 
X 
 
 
X 
X5 
X 
Hematology, 
Chemistry  
  
 
 
X 
X5 
X 

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Evaluation 
for 
Symptomatic 
Rebound PH 
X6 
X 
X 
X 
  
  
AEs/SAEs/A
ESIs 
X 
X 
X 
X 
X 
X 
Drug 
Dispensing 
for Open 
Label 
Extension 
Xl 
  
X7 
X7 
X7 
 X7 
  
Drug/Device 
Usage  
X8 
X8 
X8 
X8 
X8 
1 Ensure the subject has agreed to participate in both parts of the PAH-004 study by checking and initialing Part 1 & 
Part 2 participation in the ICF 
2 Subject must have completed 18 weeks of blinded treatment 
3 N/A-Footnote no longer applicable as of Amendment #3 
4 Pregnancy testing to be performed at the discretion of the Investigator. 
5 Hematology and chemistry labs and MetHgb will be performed on a yearly basis.  
6 Assessment Symptomatic Rebound PH: all subjects will remain in the hospital or clinic under medical 
supervision for 1 hour after starting study drug and for 1 hour after study drug is discontinued for 
observation for signs and symptoms of rebound PH. Vital signs, including heart rate, respiratory rate, 
blood pressure, and SpO2 will be recorded in the supine position every 15 minutes for 1 hour, and then 
again every 15 minutes for another hour after discontinuation of study drug. After the 1 hour 
observation period off study drug, if the subject’s status is unchanged with respect to vital signs and 
symptoms and subject does not exhibit signs or symptoms of rebound PH, they will restart their blinded 
study drug treatment and be sent home. 
7 One week of Open Label Drug dispensed by site at Week 0; all other drug dispensed to subject’s home 
via home delivery every 4 weeks thereafter 
8Site personnel should review INOpulse use with the subjects during study visits to encourage use as 
close to 24 hours per day as possible.  Reasons for device interruptions should also be reviewed with the 
subject.   
 
11.1. 
Details of Study Assessments 
11.1.1. 
Informed Consent 
At Screening, each subject (or legally authorized representative) must provide informed consent 
in writing after having had adequate time to ask questions and consider his/her participation in 
this study. Consent must be obtained prior to any protocol related procedure or assessment that is 
not part of the subject’s normal care. Subjects will indicate if they are consenting to participate in 
both parts of the PAH-004 study by checking and initialing Part 1 & Part 2 participation in the 
ICF. Participating centers will be responsible for assuring that written informed consent is 

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provided by each subject using an informed consent form (ICF) approved by the Institutional 
Review Board (IRB) or Independent Ethics Committee (IEC) granting approval for the conduct 
of the study. Documentation of IRB or IEC approval for the conduct of the study and the ICF 
must be provided to Bellerophon Pulse Technologies LLC or its designee. 
11.1.2. 
Medical History 
At Screening, relevant medical history and demographics (sex, race, and ethnicity) will be 
assessed. 
11.1.3. 
 Prior and Concomitant Medications 
All prior and concomitant medications, including all over-the-counter medications, will be 
recorded in Part 1 at Screening, Baseline, Weeks 2,  6, 10, 14, and 18 including early 
discontinuation. In Part 2, at Week 2, Week 16, Week 32, Week 52, Every 4 months and Early 
Discontinuation/End of Study. 
11.1.3.1. Diuretic Use 
In Part 1 at each study visit, the dose of any diuretic use should be recorded in the eCRF, 
including spironolactone. 
11.1.3.2. PAH Specific Therapies 
Specific attention will be paid to PAH specific and supporting therapies. Each dose of any 
specific PAH therapy should be recorded, including ERA, PDE-5 inhibitor, prostacyclin or a 
prostacyclin analog. If addition of riociguat is required, the subject will need to be discontinued 
from study drug, but should remain in study and complete all assessments until EOS. Increases 
in prostanoid dose may be necessary over the length of the study due to tachyphylaxis and will 
not be considered a TTCW event. The addition of prostanoid therapy or increases in prostanoid 
dose as a TTCW event will be determined by the ICEC. 
LTOT flow rates should be kept constant throughout the study unless the subject has persistent 
desaturations to less than 88% of SpO2, or otherwise clinically indicated. LTOT flow rate with 
the estimated length of use per day must be documented in the eCRF at all visits.  
11.1.4. 
WHO Functional Class 
WHO Functional Class assessment, as defined in Table 3, will be assessed by the clinical 
Investigator in Part 1 at Screening, Baseline, Weeks 2, 6, 10, 14, and 18, including early 
discontinuation In Part 2 at  Week 16 and 32 and 52. 
Table 3: 
WHO Functional Classification 
Class 
Subject Symptoms 
Class I* 
Patients with pulmonary hypertension but without resulting limitation of physical 
activity. Ordinary physical activity does not cause undue dyspnea or fatigue, 
chest pain or near syncope. 

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Class II 
Patients with pulmonary hypertension resulting in slight limitation of physical 
activity. They are comfortable at rest. Ordinary physical activity causes undue 
dyspnea or fatigue, chest pain, or near syncope. 
Class III 
Patients with pulmonary hypertension resulting in marked limitation of physical 
activity. They are comfortable at rest. Less than ordinary activity causes undue 
dyspnea or fatigue, chest pain, or near syncope. 
Class IV 
Patients with pulmonary hypertension with inability to carry out any physical 
activity without symptoms. These patients manifest signs of right heart failure. 
Dyspnea and/or fatigue may even be present at rest. Discomfort is increased by 
any physical activity. Syncope or near syncope may occur. 
*Only subjects with WHO Class II –IV are eligible for the study 
11.1.5. 
6 Minute Walk Test  
In Part 1, a standard 6MWT will be performed at Screening, Weeks 6, 10, 14, and 18, including 
early discontinuation , and two 6MWTs at Week 2 as presented in the ATS guidelines (ATS 
Statement 2002; Appendix A). The Screening 6MWT may be obtained at baseline if the subject 
is known to have a 6MWD ≥ 100 meters and ≤ 450 meters. The average of the two 6MWD at 
Week 2 after run-in will be used as the baseline value.  The subject should rest for at least 30 
minutes between tests. 
All 6MWTs, including those at Screening, Baseline, and post-randomization visits, should be 
performed in the same manner for each subject. Each subject will be provided with a carrying 
case with straps that will allow the device to be attached to the oxygen cylinder.  During the 
6MWT all subjects will be placed on oxygen at a continuous flow rate as prescribed by treating 
physician using an oxygen cylinder that is on a wheeled carrier.  All subjects must pull the 
oxygen tank with the INOpulse device attached to the cylinder during all 6MWTs. Flow rate 
must be recorded in eCRF. 
The subject should use the same oxygen tank and cart as well as the same flow rate during ALL 
subsequent 6MWTs, Part 1 and Part 2. If a change in the subject’s oxygen supplementation is 
clinically indicated during the 6MWT, then during all subsequent 6MWTs the subject should use 
the same increased amount of LTOT administered in the same concentration or flow rate.  
Change in flow rate should be recorded in the eCRF. 
 At Screening 6MWT should be performed on oxygen with INOpulse device (turned off) 
attached to oxygen tank.  At Week 2 6MWT should be performed on oxygen plus INOpulse 
device set at 15 mcg/kg IBW/hr and attached to oxygen tank. 
All 6MWTs after Week 2 should be performed on oxygen plus INOpulse device set at 75 mcg/kg 
IBW/hr and attached to oxygen tank  
In Part 2, the 6MWT will be performed at only Week 16, Week 32, and Week 52 on oxygen plus 
INOpulse device set at 75 mcg/kg IBW/hr and attached to oxygen tank.  

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11.1.6.
Borg Dyspnea Scale 
The Borg Dyspnea Scale, Heart Rate and SpO2 will be recorded in Part 1 at each study visit prior 
to, and immediately following, the 6MWT at Screening, Weeks 2, 6, 10, 14, and 18, including 
early discontinuation (ATS Statement 2002) and in Part 2, at week 16, week 32 and week 52.   
The BDS measures perceived breathlessness on a scale of 0 (none) to 10 (maximum) and has a 
minimally clinically important difference (MCID) of 1 point (Table 4) (Ries 2005). 
Table 4: 
Borg Dyspnea Score 
Score 
Severity 
0 
Nothing at all 
0.5 
Very, very slight (just noticeable) 
1 
Very slight 
2 
Slight (light) 
3 
Moderate 
4 
Somewhat severe 
5 
Severe (heavy) 
6 
   --- 
7 
Very severe 
8 
   --- 
9 
   --- 
10 
Very, very severe (maximal) 
11.1.7.
Vital Sign Measurements 
Vital sign measurements will be performed for Part 1 at Screening, Baseline, Weeks 2, 6, 10, 14, 
and 18, including early discontinuation. Vital sign measurements will include heart rate (HR), 
respiratory rate (RR), blood pressure (BP, systolic and diastolic), and temperature. Oxygen flow 
rate will be recorded at each visit with estimated length of use per day.   
Systemic arterial oxygenation (SpO2) will be performed in Part 1 at Screening, Baseline, Weeks 
2, 6, 10, 14, 18, and at any time of an early drug discontinuation: 
x While breathing room air for at least 5 minutes 
x While breathing prescribed oxygen flow rate for at least 5 minutes 
(
(Ries 2005).
(ATS Statement 2002)

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x While breathing prescribed oxygen flow rate with study device/drug for at least 5 minutes 
to be conducted after week 2 (not at screening or baseline), at Week 6 through Week 18 
or Early Discontinuation 
In Part 2 – Vital signs and Systemic arterial oxygenation will be performed in Part 2 at Week 16, 
Week 32, Week 52 and Every 4 months and Early Discontinuation/End of Study. 
11.1.8.
Spirometry Testing and DLCO 
Spirometry testing with DLCO will be assessed in Part 1 at Screening, and Week 18 and at any 
time of an early drug discontinuation before Week 18, and will include absolute value and 
percent predicted value of forced vital capacity [FVC], forced expiratory volume at 1 second 
[FEV1], FEV1/FVC ratio and DLCO. 
Pulmonary Function Measurements  
1. Spirometer provided for this study has to be calibrated and maintained to acceptable 
respiratory function standards (Miller 2005). 
2. Forced-spirometry PFTs will be repeated up to 8 times to obtain 3 acceptable readings 
according to ATS/ERS 2005 spirometry guidelines. 
3. Forced-spirometry repeatability is achieved when the difference between the largest and 
WKHQH[WODUJHVW)9&LVPODQGWKHGLIIHUHQFHEHWZHHQWKHODUJHVWDQGWKHQH[W
largest FEV1 LVPl)RUVXEMHFWVZLWKDQ)9&RI/ERWKWKHVHYDOXHVDUH 100 
ml. 
4. Total lung capacity (TLC), if results not obtained in the last 6 months, should be obtained 
according to ATS/ERS 2005 guidelines. 
5. DLCO (diffusing capacity for the lungs measured using carbon monoxide) will be 
performed at Screening and Week 18, and at any time of an early drug discontinuation 
before Week 18. (according to ATS/ERS 2005 spirometry guidelines). 
11.1.9. 
Physical Examination 
A physical examination, including height and weight, will be performed in Part 1 at Screening to 
determine IBW. Physical examinations, including weight, will be performed at Week 18, and at 
any time of an early drug discontinuation before Week 18.  A physical examination will not be 
required for Part 2.  
11.1.10. 
Pregnancy Test 
A pregnancy test will be performed in Part 1 at Screening Week 18, and at any time of an early 
drug discontinuation before Week 18.  In Part 2, pregnancy testing is at the discretion of the 
Investigator. 
Females of childbearing potential must have a negative serum or urine pregnancy test at 
Screening. All female subjects should take adequate precaution to avoid pregnancy by using 
highly effective birth control methods which include (as outlined in CTFG Contraceptive 
Recommendations Section 4.1): 
x Combined (estrogen and progestogen containing) hormonal contraception associated 
ATS/ERS 2005 spirometry guidelines.
(Miller 2005)

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with inhibition of ovulation: 
o oral 
o intravaginal 
o transdermal 
• progestogen-only hormonal contraception associated with inhibition of ovulation: 
o oral 
o injectable 
o implantable 
• intrauterine device (IUD) 
• intrauterine hormone-releasing system ( IUS) 
• bilateral tubal occlusion  
• vasectomised partner  
• sexual abstinence  
11.1.11. 
Hematology, Chemistry, Methemoglobin, NT-proBNP 
Hematology laboratory tests will be performed in Part 1 at Screening and Week 18, and at any 
time of an early drug discontinuation before Week 18. These laboratory tests will include 
complete blood count (CBC) with differential and platelet count. In Part 2 will be performed at 
Week 52, yearly and at End of Study or Early Discontinuation. 
Chemistry laboratory tests will be performed in Part 1 at: Screening and Week 18, and at any 
time of an early drug discontinuation before Week 18. 
In Part 2, Hematology and Chemistry laboratory tests will be performed at Week 52, then on a 
yearly basis until EOS, or Early Discontinuation.  These laboratory tests include:  electrolytes 
(Na, K, HCO3, and Cl), glucose, blood urea nitrogen (BUN), creatinine (Cr), aspartate 
aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transpeptidase 
(GGT), alkaline phosphatase, lactate dehydrogenase (LDH), creatine phosphokinase (CPK), 
magnesium, bilirubin total/direct, uric acid, total protein, and albumin.  
Methemoglobin levels (%) will be measured by oximetry in Part 1 at Screening and Week 2, 
Week 6 and at any time of an early drug discontinuation before Week 18.  In Part 2 will be 
performed at Week 0, Week 52 and yearly including EOS or early discontinuation 
NT-proBNP will be collected in Part 1 at Screening and Week 18. NT-proBNP will not be 
collected in Part 2 
11.1.12. 
Eligibility of INOpulse Device Usage  
Subjects will be required to demonstrate an average daily usage ≥ 12 hours (rounded to the 
nearest hour) with no more than 2 days of usage < 8 hours per day of the INOpulse device during 
the initial 2 week run-in period of the study in order to be eligible to continue to the treatment 
phase. Calculation of compliance: First day and last day’s data during the run-in period does not 
count towards compliance data.   This assessment will occur during the Run-in period at Week 2 
in Part 1. 

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11.1.13. 
Right Heart Catheterization 
A RHC may be performed under the following circumstances in Part 1:  
• A RHC will be performed in a subset of approximately 50 subjects at selected sites. The 
RHC performed at Baseline will be used as entrance criteria. A repeated RHC will be 
performed at Week 18 to assess changes in pulmonary hemodynamics. RHC at Week 18 
should be performed while the subject is in stable condition and on study drug for at least 
30 minutes prior to the start of the procedure. 
• For subjects who are not included in this subset who have not had a RHC within the 
previous 5 years that meet eligibility criteria and are otherwise eligible, a RHC will be 
conducted at Screening. 
• Subjects in the subset who discontinue study drug prior to Week 18 will have a RHC 
performed at time of study drug discontinuation rather than Week 18.. 
11.1.13.1. RHC Procedure  
Hemodynamic stability will be established prior to recording baseline hemodynamic data and at 
Week 18 or early discontinuation in Part 1 
Cardiac output (CO) will be determined by thermodilution (in triplicate). For each CO, PAP 
S/D/mean; SAP S/D/mean; mRAP; mPCWP or LVEDP, SpO2, and mixed venous oxygen 
saturation (blood sample from tip of PA catheter when not in the wedge position) will also be 
measured. The average of the triplicate measurements will be used in the data analysis. The CO 
measurements must be within 15% of one another. To determine if the individual values are within 
15% of one another, PAP S/D/mean; SAP S/D/mean; mRAP; mPCWP and LVEDP must be 
measured at end-expiration. All measurements will be recorded in the eCRF. 
Important Note:  The transducer must be leveled at the mid-axillary line at the level of the mid-
sternum (half way between the mid-sternum and table top). The distance of the mid-axillary line 
from the table top must be recorded in the eCRF for the Baseline, Week 18, or any RHC 
performed at the time of study drug discontinuation. The transducer must be leveled to the same 
height at the baseline RHC and for all subsequent RHC.   
Cardiac output must be performed only by thermodilution or Continuous Cardiac Output (CCO). 
Iced or room temperature saline may be used. The methods used for measurement should be 
maintained for all RHC and recorded in the eCRF. 
Acute Vasoreactivity Testing 
AVT will be performed after Baseline RHC measurements are completed and prior to 
randomization in all subjects at selected centers that will perform RHC in Part 1 if possible. AVT 
testing with iNO is preferred if available at the site. If not available, the site may use other means 
of AVT that are part of clinical care at the site. RHC must be performed as described in 
Section 11.1.13.1. Measurements must be performed in triplicate after stabilizing the subject on 
oxygen at a flow rate to maintain SpO2 at ≥ 90% plus iNO 40 ppm for at least 5 minutes. 
Exposure RHC measurements will be recorded in the eCRF. Data recorded will include iNO dose 
(ppm) and duration of iNO exposure (minutes) or dose of alternative agent used for AVT and 
duration of exposure. A responder to AVT with iNO is defined as a decrease in mPAP by > 10 
mmHg to an absolute level of < 40 mmHg without a clinically significant decrease in CI. 

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11.1.13.1.1. 
Anesthesia 
If either moderate sedation or general anesthesia is used at the Baseline RHC in Part 1, the same 
sedation or anesthesia should be used for subsequent RHCs. 
11.1.13.1.2. 
LTOT 
The same flow rate of LTOT should be used during all RHCs unless a greater concentration of 
oxygen is needed for medical reasons. LTOT levels must be recorded in the eCRF. Reasons for 
any change in oxygen use should be documented. 
11.1.13.2. Hemodynamic Calculations 
The following calculations will be used to determine hemodynamic and pharmacodynamic 
endpoints: 
CI will be calculated according to the formula: 
CI (L/min/m2) = CO ÷ BSA 
where CO = cardiac output (L/min), and BSA (body surface area) (m2) = 0.007184 * (weight 
0.425) * (height 0.725) with weight expressed in kg and height in cm 
PVR will be calculated according to the formula: 
PVR (dyn.sec/cm-5) = 80 (mPAP - mPCWP) ÷ CO 
where mPAP = mean pulmonary artery pressure (mmHg), mPCWP = mean pulmonary 
capillary wedge pressure (mmHg), and CO = CO (L/min) 
SVR will be calculated according to the formula: 
SVR (dyn.sec/cm-5) = 80 (mSAP - mRAP) ÷ CO 
where mSAP = mean systemic arterial pressure (mmHg), mRAP = mean right atrial pressure 
(mmHg), and CO = CO (L/min) 
TPR will be calculated according to the formula: 
TPR (dyn.sec/cm-5) = 80 (mPAP ÷ CO) 
where mPAP = mean pulmonary artery pressure (mmHg) and CO = CO (L/min) 
11.1.14. 
Echocardiogram 
An echocardiogram will be performed in Part 1 on a subset of approximately 50 subjects at 
selected sites at Baseline, Week 10, Week 18, and any time a subject discontinues treatment prior 
to week 18. Subjects who have discontinuation of study drug will undergo echocardiography at 
the time of discontinuation.  
Echocardiographic measures will include right ventricular function (systolic pulmonary artery 
pressure [sPAP], fractional area change of the right ventricle, tricuspid annular motion/tricuspid 
annular plane systolic excursion, tricuspid annular systolic velocity, and Tei index) and left 
ventricular function (including left ventricular ejection fraction [LVEF], LV size, and 

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improvement in LV early diastolic relaxation velocity). All echocardiograms will be supervised, 
collected, and evaluated by a central core laboratory. 
For all other subjects not enrolled in the echocardiogram subset, a local echocardiogram will be 
obtained at baseline and at any time the subject discontinues treatment prior to week 18 as a 
safety endpoint. Results of PASP, RVEF, and LVEF will be recorded in the eCRF in Part 1. 
Site Preparation, Sonographer Training and Certification 
Site instruction manual 
The central core laboratory will prepare a Site Instruction Manual (SIM) designed to provide 
study sites information regarding: 
• The required echo views to obtain 
• Instructions on how to optimize images for obtaining high quality views, to 
complement sonographer training with central core laboratory staff and serve as a 
real-time reference 
• Instructions on how to send echo images to the Cardiac Imaging Core Lab for 
analysis.  
Sonographer training 
Training will be provided by the Cardiac Imaging Core Lab.  
Sonographer certification 
Each site will be asked to designate specific sonographer(s) to perform all study 
echocardiograms. Following training, each site sonographer will be required to submit 1 sample 
study performed per study protocol. Studies will be scrutinized for adherence to protocol, 
acquisition of all required views, and image quality. Itemized direct written feedback and 
suggestions from the central vendor will be provided. Sonographers will have the opportunity to 
resubmit a sample protocol study. Following submission of an adequate sample study, site 
sonographer will be officially certified, with written documentation. 
11.1.15. 
Evaluation for Symptomatic Rebound Pulmonary Hypertension 
In Part 1, after randomization at Week 0 and at end of Run-in, Week 2, all subjects will remain in 
the hospital or clinic under medical supervision for 1 hour after starting study drug and for 1 
hour after study drug is discontinued for observation for signs and symptoms of rebound PH (see 
Section 15.1.5). Vital signs, including heart rate, respiratory rate, blood pressure, and SpO2 will 
be recorded in the supine position every 15 minutes for 1 hour, and then again every 15 minutes 
for another hour after discontinuation of study drug. 
At Week 0, INOpulse device should be set at 15 mcg/kg IBW/hr.  At Week 2 the evaluation will 
be performed with the INOpulse device reset to 75 mcg/kg IBW/hr 
In the opinion of the Investigator, subjects who develop clinically significant signs and/or 
symptoms consistent with rebound PH (e.g., systemic hypotension, change in heart rate, new 
onset syncope, or decreased systemic oxygenation) temporally associated with acute withdrawal, 
and including those associated with device malfunction or failure, will be discontinued from 
study treatment and not replaced (see Section 10). 

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In Part 2 evaluation should be performed at Week 0, Week 16 and Week 32 and Week 52. 
During Part 2 if the subject develops clinically significant rebound PH, the subject may continue 
on open label therapy if it is considered in the opinion of the investigator to be in the subject’s 
best interest. 
The final diagnosis of rebound PH will be adjudicated by an ICEC. The DMC will review the 
data for subjects enrolled in the study and evaluated for rebound PH (including the ICEC 
adjudication) and make a decision whether or not to continue evaluation for rebound PH and/or 
to determine additional steps required in order to maintain subject safety. 
After the 1 hour observation period off study drug, if the subject’s status is unchanged with 
respect to vital signs and symptoms and subject does not exhibit signs or symptoms of rebound 
PH, they will restart their blinded study drug treatment and be sent home. 
11.1.16. 
Patient Reported Outcomes 
Collection of data for both general and disease-specific patient reported outcome measurements 
will be administered during Part 1 at Baseline, Week 18, including and at any time of an early 
drug discontinuation before Week 18.  These are not collected during Part 2. 
11.1.16.1. SF-36 
The SF-36V2 health survey is a widely used, multi-dimensional, validated health related quality 
of life (HRQoL) questionnaire designed to measure dimensions of general, physical, and mental 
health in large populations, with scores ranging from 0 to 100. The questionnaire yields an 8-
scale profile of functional health and well-being scores as well as psychometrically-based 
physical and mental health summary measures and a preference-based health utility index. It is a 
generic measure, as opposed to one that targets a specific age, disease, or treatment group. 
Accordingly, the SF-36 health survey has proven useful in surveys of general and specific 
populations, comparing the relative burden of diseases, and in differentiating the health benefits 
produced by a wide range of different treatments. It consists of eight multi-item domains 
combined to provide the following two summary scores: the physical component summary, 
composed of physical functioning, role-physical, bodily pain, and general health domains; and 
the mental component summary, composed of role-emotional, mental health, social functioning, 
and vitality domains.  
11.1.17. 
Adverse Events 
Adverse events, including AESIs and serious AEs, will be assessed in Part 1 at Baseline, Weeks 
2, 6, 10, 14, and 18, including and at any time of an early drug discontinuation before Week 18 If 
an AE, SAE or AESI occurs while the subject is at home, then either the subject, the subject’s 
caregiver or family member, or other responsible person will contact the study coordinator or 
Investigator at the research site and that person will record, assess, and report the event as 
indicated.  In Part 2 at  Week 2, Week 16, Week 32, Week 52, every 4 months and Early 
Discontinuation/End of Study 

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11.1.17.1. Adverse Events of Special Interest 
AESIs will include all respiratory related AEs, epistaxis, syncope and rebound PH. All SAEs, 
and rebound PH will be adjudicated (see also Section 15.7). 
At each visit, subjects should be queried on all AESIs. Respiratory AEs should be specifically 
sought out. Subjects should be comprehensively queried for, e.g., hospitalization for any reason, 
pulmonary infections, important increases in chronic pulmonary medications, dyspnea, cough, 
hypoxia, acute respiratory failure, bronchitis, epistaxis, syncope including pre-syncope and loss 
of consciousness (new onset, or if history of syncope, recurrent syncope events), signs and 
symptoms of rebound PH and any other respiratory related AEs. These queries are to be 
documented in the eCRF on a separate page dedicated to AESIs. The severity of all AEs (AESI 
and non-AESI), treatment given, hospitalization required, and duration in number of days should 
be recorded in the AE section of the eCRF. 
11.1.18. 
Drug Dispensing for Run-in Period 
When a subject enters the Run-in period, the site will provide the subject with two INOpulse 
devices (a primary and a back-up), and at least a 1 week supply of study drug and ancillary 
supplies assigned by the Interactive Response Technology (IRT) system. The subject will also be 
given a handheld mobile device to be used to capture drug accountability.   
In addition, the Week 2 drug supply will be shipped directly to the subject’s home to ensure the 
subject is able to receive and acknowledge shipments of drug supplies. 
Details of the home delivery will be outlined in the study specific Distribution Plan document. 
11.1.19. 
Drug Dispensing for Blinded Treatment Period (Part 1) 
When a subject is enrolled in the blinded treatment period of the study, the site will provide the 
subject with two INOpulse devices (a primary and a back-up), and at least a 1 week supply of 
study drug and ancillary supplies assigned by the IRT.   
All additional treatment period drug supply will be shipped directly to the subject’s home. 
Details of the home delivery will be outlined in the study specific Distribution Plan document. 
11.1.20. 
Drug Dispensing for Open Label Long Term Extension (Part 2) 
When a subject is enrolled in the open label long term extension of the study, the site will 
continue to provide the subject with two INOpulse devices (a primary and a back-up), a 1 week 
supply of study drug and ancillary supplies assigned by the IRT.   
All additional treatment period drug supply will be provided directly to the subject’s home. 
Details of the home delivery will be outlined in the study specific Distribution Plan document. 
No study drug supplies for Part 1 can be used for Part 2 of the study.  All supplies for Part 1 
must be returned, new supplies for Part 2 will be provided to the patient.  
11.1.21. 
Drug/Device Usage 
Treatment usage will be automatically monitored by the INOpulse device. At each treatment visit 
in Part 1 and Part 2, including early discontinuation and EOS, site research team personnel will 

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upload the usage data from the INOpulse device to the data server. This data may also be 
reviewed with the subject. In the event that the INOpulse device is returned to the Sponsor rather 
than the site, the usage data will be uploaded by the Sponsor or designee, and the site will be 
alerted to the upload. Subjects should be encouraged to use the study drug/device as close to 24 
hours per day as possible. Subjects should be encouraged to wear the device and breathe the drug 
as much as possible while sleeping, while at home, and during daytime activities.  
11.1.22. 
INOpulse Device Questionnaire 
In Part 1, at the Week 18 visit, or at time of early discontinuation prior to week 18, each subject 
will be asked to complete a brief questionnaire regarding the usability of the INOpulse device.  
11.1.23. 
Survival Assessment 
If a subject is unable to be seen in the clinic for study assessments, then a survival form should 
be completed for each visit that the subject is not seen in Part 1, including  early discontinuation. 
11.1.24. 
Medical Resource Utilization 
For the purpose of economic evaluation of the use of iNO as compared to placebo, medical 
healthcare resource utilization (HRU) will be recorded in Part 1.  
At Screening, subjects will be asked about the number of hospitalizations, ER visits, and 
outpatient visits in the previous year. At each visit thereafter, the Investigator will record the 
subject’s HRU in terms of number of hospitalizations and outpatient medical care, including ER 
visits, since the previous scheduled visit. The collection of HRU will continue through EOS.  
A hospitalization is defined as any visit to the hospital requiring an overnight stay. The 
frequency and duration of any inpatient hospitalization will be recorded along with the primary 
reason for the hospitalization and the primary and secondary diagnosis at discharge. For each 
hospitalization, the duration spent in each of the following will be recorded:  intensive care unit, 
general ward, emergency room, other, along with the type of physician consulted.  
The frequency of unscheduled outpatient visits will be recorded along with the type of provider 
and type of facility visited, including the ER. An unscheduled outpatient visit is defined as any 
visit with a medical practitioner, in the office or at home, apart from the study visits.   
Additionally, any procedures conducted during hospitalization or unscheduled outpatient visits 
will be recorded in the eCRF.   
HRU forms should be reviewed by the Investigator for potential AEs. If AEs or SAEs are 
confirmed, then the Investigator must record the events as per instructions given in Section 15.1 
of the protocol. 
11.1.25. 
Lung Transplantation Listing Status 
Subjects on active lung transplant lists will be recorded in the eCRF. At each study visit in Part 
1, including early discontinuation, the status of the subject on an active lung transplant list (i.e., 
not on list, on active list, undergone lung transplantation, removed from active list, died while 
awaiting transplant) will be recorded in the eCRF. If the subject is removed from an active 
transplant list during the study, the reason for removal must be recorded in the eCRF. Vital status 

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must be determined 30 days after lung transplantation. Lung transplant assessments will not be 
performed in Part 2. 
 

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12. 
INVESTIGATIONAL STUDY DRUG AND DEVICE 
12.1. 
Rationale for Study Design and Dose 
The proposed study design allows for determination of whether or not the drug/device 
combination therapy of iNO at a pulsed dose of 75 mcg/kg IBW/hr delivered via the INOpulse 
device is effective and well-tolerated. In the Part 2 Open Label Treatment, long term safety data 
will be collected and will allow subjects who benefit from iNO to continue to receive therapy. 
Subjects randomized to active study treatment will receive iNO at 75 mcg/kg IBW/hr for up to 
24 hours/day until week 18 or early drug discontinuation before Week 18 via the INOpulse 
device in a blinded manner.    
Placebo, consisting of nitrogen (N2, 99.999%) gas, will be administered for up to 24 hours/day 
until EOS via the INOpulse device in a blinded manner at 75 mcg/kg IBW/hr device setting.   
Subjects on open label treatment will receive iNO at a pulsed dose of 75 mcg/kg IBW/hr 
delivered via the INOpulse device. 
12.2. 
Description of Study Drug and Device 
12.2.1.
Inhaled Nitric Oxide 
The active study drug, iNO, Nitric oxide for inhalation will be supplied in size 0.074 liter 
aluminum cartridges at a concentration of 6.0 mg/L (4880 ppm). 
Placebo to match study drug will be supplied in size 0.074 liter aluminum cartridges containing 
nitrogen (N2, 99.999%) gas. 
Both the nitric oxide and placebo cartridges will be labeled to maintain the blind. 
All subjects will change cartridges in the INOpulse device approximately every 12 hours (see 
INOpulse Instruction for Use), and document the cartridge change in the IRT (see Section 13.3).  
12.2.2. 
INOpulse Device Description and Operation 
The INOpulse Instruction for Use Guide provides complete guidance on the features of the 
INOpulse device.  
12.2.3. 
Traveling with iNO/INOpulse Combination Therapy 
For any travel longer than 24 hours, the subject should be instructed to take a second INOpulse 
device and at least 48 hours’ worth of supplies (i.e., study drug cartridges, cannulae). Each 
cartridge should last approximately 12 hours during use. Subjects should be instructed to have 
enough supplies in case of travel delays, and to make sure the INOpulse device battery is fully 
charged. A fully charged battery will provide power for about 16 hours. 
Extended travel will be evaluated on a case-by-case basis and instructions will be provided by 
the Sponsor. 
 
 
Section 13.3)

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12.3. 
Study Drug Administration 
There will be 2 dosing cohorts with 94 subjects in each cohort. Dosing regimen during the 
treatment phase will be via the INOpulse device as shown in Table 5 below. 
Table 5: 
Dosing Regimen via INOpulse Device 
Cohort 
Number of 
Subjects 
Dosing Regimen via INOpulse Device 
Part 1:Cohort 
1: Placebo 
94 
Placebo at a dose setting of 75 mcg/kg IBW/hr for up to 24 hr/day 
99.999% Nitrogen [N2] cartridge; change approximately every 12 
hours 
Part 1:Cohort 
2: iNO 75 
mcg/kg 
IBW/hr 
94 
iNO at a dose setting of 75 mcg/kg IBW/hr for up to 24 hr/day  
6.0 mg/L [4800 ppm] NO cartridge; change approximately every 12 
hours 
Part 2: Open 
Label 
Approx. 150 
iNO at a dose setting of 75 mcg/kg IBW/hr for up to 24 hr/day  
6.0 mg/L [4800 ppm] NO cartridge; change approximately every 12 
hours 
*Note: Study drug is dosed according to IBW and not actual body weight. IBW is determined by a subject’s sex 
and height and therefore will not change during the study period. 
Study drug should be started after the all Inclusion and Exclusion criteria are met, and following 
randomization. 
12.4. 
Packaging and Labeling of Study Products 
Study drug, device and cannula will be provided by Bellerophon Pulse Technologies LLC. and 
clinical packaging and labeling will be done by a third party vendor with all legal and regulatory 
requirements of each country in which the study is being performed. 
12.5. 
Storage, Dispensing, and Accountability of Investigational Study 
Products 
12.5.1. 
Storage 
The study drug is to be stored in accordance with the storage/temperature requirements specified 
on the study drug labels. The INOpulse device should be stored within the recommended 
operating conditions specified in the INOpulse Instruction for Use, provided as a separate 
document. 
In the hospital or clinic, the study drug cartridges and devices should be stored in a secured, 
temperature controlled, and limited access area. At the subject’s home, drug and devices should 
be stored in a secured area that is not close to a heat source (such as a heater, radiator, furnace, 
fireplace, oven, dryer, etc.). Avoid storage in unsecured, small areas (such as closets, trunks of 
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The Sponsor or their designee reserves the right to inspect the investigational product storage 
area at the Investigator site before and during the study. Study drug and device will only be used 
solely for the purposes of this study. 
12.5.2. 
Dispensing 
Only subjects participating in the Run-in, treatment phase, and/or open-label extension of the 
study may receive study drug and device. Authorized, medically trained research team members 
will initially administer the study drug and device to randomized subjects. Each subject will be 
provided an INOpulse Instruction for Use describing the safe use of the iNO/INOpulse 
combination product. 
The INOpulse settings that are used by the device to set the study drug at the appropriate dosage, 
i.e., the subject’s sex and height should be checked and verified by research staff and entered 
into the IRT in order to ensure the INOpulse device is programmed correctly. The IRT will 
determine the dosing cohort, and will be used to program the INOpulse devices in a blinded 
manner.   
When a subject enters the Run-in period, the subject will be given a 1 week supply of cartridges 
and cannulae, two INOpulse devices (a primary and a back-up device), along with any additional 
ancillary supplies for home use as assigned by the IRT. The subject will receive the Week 2 
cartridge resupply via home delivery; to be distributed directly from the Central Distribution 
Center (CDC) or designee to the subject’s home by a third party carrier. The subject must 
acknowledge receipt of the shipment, and account for each cartridge used in the IRT. At the end 
of the 2 week Run-in period, the subject must return to the study site with both INOpulse 
devices.   
If the subject qualifies for enrollment in the treatment period, the subject will be given a 1 week 
supply of cartridges, cannulae, and two INOpulse devices (a primary and a back-up), along with 
any additional ancillary supplies for home use as assigned by the IRT. The subject will receive 
resupply shipments via home delivery; to be distributed directly from the CDC or designee to the 
subject’s home by a third party carrier. On a monthly basis, in conjunction with resupply 
shipments, used study drug cartridges will be returned from the subject’s home to the CDC by a 
third party carrier. For ALL deliveries and returns of study drug kits and device kits, 
acknowledgment of receipt and accountability will be completed in the IRT, documenting which 
kits are delivered, used, and returned from the subject’s home. 
If the subject enters the long term extension (Part 2), the subject will be given a 1 week supply of 
cartridges, cannula, and two INOpulse devices (a primary and a back-up), along with any 
additional ancillary supplies for home use as assigned by the IRT. The subject will receive 
resupply shipments via home delivery; to be distributed directly from the central distribution 
center or designee to the subject’s home by a third party carrier. On a monthly basis, in 
conjunction with resupply shipments, used study drug cartridges will be returned from the 
subject’s home to the central distribution center by a third party carrier.  
Instruction regarding the direct to subject distribution and return process will be outlined in the 
study specific Distribution Plan. 

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12.5.3. 
Accountability of Investigational Study Products 
Investigational product accountability records for the investigational products mandated by the 
Sponsor in accordance with all applicable regulatory requirements must be kept current and 
should include, but not be limited to: 
• the dates, quantities, and unique identification number of investigational products 
received from the Sponsor  
• subject identification, date, amount, and unique identification numbers dispensed 
• date, amount, and unique identification numbers of investigational products returned , 
as appropriate 
The IRT may be utilized to assist in the capture and maintenance of this information. These 
records must be made available for inspection by the Sponsor or their designee during the course 
of the study. 
The Investigator or designee is responsible for the accountability of all used and unused study 
supplies. The Investigator or designee will maintain accurate study drug and device accountability 
records documenting date, quantities, and unique identification numbers of supplies received, 
dispensed, returned, and accounts of any study drug and device lost, missing, or damaged. The 
Investigator or designee will retain copies of these logs on file. 
At the conclusion of the study, a final inventory of study drug will be performed by the Sponsor 
or their designee. Any supplies which cannot be accounted for will be documented.  
Any remaining drug and devices at the end of the study will be handled as per Sponsor 
instructions (e.g., returned to Sponsor, CDC or their designee). 
12.6. 
Study Drug and Device Disposition 
Used and unused study drug cartridges and devices should not be destroyed or disposed of by the 
site, the distribution center, or by the subject. The used cartridges and devices will be returned 
regularly from the site, or subject home, to the CDC and/or manufacturing facility, utilizing a 
third party carrier.  
Collection of used and unused study drug cartridges and devices will be outlined in the study 
specific Distribution Plan. 
12.7. 
Treatment Usage 
Treatment usage will be automatically monitored at each visit in Part 1 and Part 2, including  
Week 18, early termination or EOS or by site research team personnel (hours:minutes per day) 
by capturing the INOpulse usage log in the IRT. Additionally, the subject’s INOpulse device will 
be shipped to the Sponsor at the EOS and/or for maintenance where the INOpulse software log 
can be captured in a computer database. 
 

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13. 
RANDOMIZATION, BREAKING OF BLINDED CODES AND 
INTERACTIVE RESPONSE TECHNOLOGY (IRT) SYSTEM 
13.1. 
Randomization and Blinding 
All eligible subjects will be screened for enrollment in Part 1. All eligible and consented subjects 
will be randomized into 1 of 2 treatment groups in a ratio of 1:1. 
Randomization will be performed using an IRT system. Randomization will occur ONLY after 
the subject has signed the informed consent, has been enrolled into the study, and has met all 
Inclusion and Exclusion criteria.   
Study drug should be started after randomization during the Run-in (Baseline) visit.  
All study drug cartridges will be labeled with informative language that each cartridge contains up 
to 6.0 mg/L (4880 ppm) NO gas to allow for compliance with compressed gas transportation 
regulations while maintaining a blinded label. All study labels will indicate the kit number and all 
drug cartridges will be labeled with a blinded unique identification number prior to shipment to 
the investigative site or the subject’s home. Drug cartridges are intended for use by a single 
subject who will be assigned the corresponding kit number on the study label by the IRT.  
Similarly, all devices will be uniquely identified, and tracked and controlled by the IRT. 
13.2. 
Breaking of Blinded Codes 
The blind may be broken only if specific urgent treatment would be dictated by knowing the 
treatment status of the subject. 
The Investigator or designee will be able to call or login to the IRT to unblind a subject. It is 
strongly recommended to discuss the case with the Sponsor’s medical monitor before 
unblinding. 
The date, time, and reason for the unblinding must be documented in the eCRF, and the Sponsor’s 
medical monitor must be informed as soon as possible. 
13.3. 
Interactive Response Technology (IRT) 
Selected individuals at each study center, along with subjects, will be authorized by pre-coded 
identification numbers to have password protected access to the designated portions of the 
system. Authorized individuals will interact with the IRT in accordance with the user manual. 
The IRT will be used by the site to assign subjects randomization numbers, dosing cohorts, and 
drug/device supplies. 
The IRT will also be used for functions such as:  accountability (by site and subjects), 
dispensing, reordering or replacement of INOpulse device, cartridges or ancillary supplies, 
programming of INOpulse devices, and emergency unblinding of subject treatment. 
Corresponding messages will be sent to the study center to confirm completion of each process. 
 

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14. 
CONCOMITANT MEDICATIONS 
Prior and concomitant medications will be coded according to the WHO Drug Dictionary and 
summarized by drug class and drug name for each formulation and for all subjects combined. 
14.1. 
Allowed PAH Approved Medication Changes During the Study 
Currently approved treatments include:  synthetic prostacyclin (i.e., epoprostenol, a prostacyclin 
analog, treprostinil or iloprost), an ERA (i.e., bosentan, ambrisentan, or macitentan), and PDE-5 
inhibitors (i.e., sildenafil and tadalafil).  
PAH therapies may be altered or additional therapies added only for evidence of clinical 
worsening due to PAH as defined in the protocol throughout the trial.  
LTOT flow rates should be kept constant throughout the study unless the subject has persistent 
desaturations to less than 88% of SpO2, or otherwise clinically indicated. LTOT flow rate with 
the estimated length of use per day must be documented in the eCRF at all visits. 
All PAH approved medications should be given as per standard of care, with the exception that 
inhaled prostaglandins (Ventavis® and Tyvaso®) and oral sildenafil doses should be not be given 
within 1 hour of a scheduled RHC.  

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15. 
ADVERSE EVENTS AND DEVICE DEFICIENCIES 
At each study visit for Part 1 and Part 2, the Investigator will determine whether any AE has 
occurred. The Investigator will also instruct the subject to contact the Investigator (or designee) 
in between study visits to report any AEs.   
Adverse events will be coded according to the current MedDRA classification in use.   
The Investigator will record the nature, severity, treatment and outcome of the AE, and will 
determine their association to the investigational product or procedures involved in the study. 
15.1. 
Definitions 
15.1.1. 
Adverse Event 
An AE is any untoward medical occurrence associated with the use of an investigational product 
in humans, whether or not considered investigational product related. 
An AE can be any unfavorable or unintended sign (e.g., an abnormal laboratory finding), 
symptom, or disease temporally associated with the use of an investigational product, without 
any judgment about causality. This includes any events that occur during investigational product 
administration or, if present prior, have worsened in severity. 
The Investigator will determine and record the seriousness, severity, relationship, and outcome 
for all AEs.  
15.1.2. 
Adverse Device Effect 
Adverse device effect (ADE) is an AE related to the use of an investigational medical device. 
This includes an AE resulting from insufficiencies or inadequacies in the instructions for use, the 
deployment, the implantation, the installation, the operation, or any malfunction of the 
investigational medical device. 
15.1.3. 
Device Deficiency 
Device deficiency is defined as an inadequacy of a medical device related to its identity, quality, 
durability, reliability, safety or performance, such as malfunction, misuse, or use error and 
inadequate labeling. All device deficiencies should be reported including outcome of device 
deficiency, regardless of whether they lead to an adverse event.  
15.1.4. 
Suspected Adverse Reaction 
A suspected adverse reaction (SAR) is an AE for which there is a reasonable possibility that the 
investigational product caused the AE. For the purposes of IND safety reporting, possibility 
means there is evidence to suggest a causal relationship between the investigational product and 
the AE. Suspected adverse reaction implies a lesser degree of certainty about causality than 
adverse reaction, which means any AE caused by an investigational product. 
15.1.4.1. Unexpected Adverse Event or Unexpected Suspected Adverse Reaction 
An AE or SAR is considered unexpected if it is not listed in the adverse reactions section of the 
Investigator Brochure, or is not listed at the specificity or severity that has been observed. 

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Unexpected, as used in this definition, also refers to AEs or SARs that are mentioned in the 
Investigator Brochure as occurring with a class of drugs, or as anticipated from the 
pharmacological properties of the drug, but are not specifically mentioned in the adverse reaction 
section as occurring with the particular drug under investigation. 
15.1.5. 
Adverse Events of Special Interest 
Adverse events of special interest (serious or nonserious) are those which have scientific and 
medical concern specific to the use of the investigational product, which may warrant ongoing 
monitoring and communication with Investigators in order to fully characterize and understand 
the events.  
 AESIs will be queried at each visit and documented on a separate AESI page in the eCRF and 
recorded on the Adverse Event eCRF page.  
• Hospitalization for pulmonary reasons 
• Pulmonary infections  
• Important increases in chronic pulmonary medications  
• Dyspnea  
• Cough  
 
 
 
• Hypoxia 
 
 
 
 
• Acute respiratory failure  
• Bronchitis 
• Epistaxis 
• Syncope, pre-syncope or loss of consciousness  (new onset, or if history of syncope, 
recurrent syncope events) 
• Clinically significant signs and/or symptoms (as determined by the Investigator) 
consistent with rebound PH (e.g., systemic hypotension, change in heart rate, new 
onset syncope, or decreased systemic oxygenation) temporally associated with acute 
withdrawal and including those associated with device malfunction or failure.   
15.1.6. 
Serious Adverse Event or Serious Adverse Reaction 
A SAE or SAR is considered serious if, in the view of either the Investigator or Sponsor, it results 
in any of the following outcomes: 
• Death 
• A life-threatening AE 
• Inpatient hospitalization or prolongation of existing hospitalization 
• A persistent or significant incapacity or substantial disruption of the ability to 
conduct normal life functions, or 
• A congenital anomaly/birth defect 
Important medical events that may not result in death, be life-threatening, or require 
hospitalization may be considered serious when, based upon appropriate medical judgment, they 
may jeopardize the subject and may require medical or surgical intervention to prevent one of the 
outcomes listed in this definition. Examples of such medical events include allergic 

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bronchospasm requiring intensive treatment in an emergency room or at home, blood dyscrasias 
or convulsions that do not result in inpatient hospitalization, or the development of drug 
dependency or drug abuse. A planned hospitalization for pre-existing condition, or a procedure 
required by the protocol, without a serious deterioration in health, is not considered to be a SAE. 
This classification of serious events includes device deficiencies that might have led to a SAE if 
(a) suitable action had not been taken; or (b) intervention had not been made; or (c) circumstances 
had been less fortunate.  
15.1.7. 
Unanticipated Serious Adverse Device Effect 
An unanticipated serious adverse device effect (USADE) is any serious adverse effect on health or 
safety or any life-threatening problem or death caused by, or associated with, a device, if that 
effect, problem, or death was not previously identified in nature, severity, or degree of incidence 
in the investigational plan or application (including a supplementary plan or application), or any 
other unanticipated serious problem associated with a device that relates to the rights, safety, or 
welfare of subjects. A USADE is a serious adverse device effect, which by its nature, incidence, 
severity or outcome has not been identified in the current version of the Investigator’s Brochure. 
15.1.8. 
Life Threatening 
An AE is considered “life-threatening” if, in the view of the Investigator or Sponsor, it places the 
subject at immediate risk of death from the AE as it occurred. It does not include an AE that, had 
it occurred in a more severe form, might have resulted in death. 
15.1.9. 
Serious, Unexpected, Suspected Adverse Reaction 
All serious, unexpected, and suspected adverse reactions (SUSARs) must be reported by the 
Sponsor. Of note, in the US, the Sponsor must report an AE as a SAR only if there is evidence to 
suggest a causal relationship between the drug and the AE. 
15.2. 
Severity and Causality Assessment for Adverse Events 
15.2.1. 
Severity 
Severity of an AE will be defined from the qualitative assessment of the degree of intensity of the 
event as determined by the Investigator or as reported by the subject. The assessment of severity 
is made irrespective of drug relationship or seriousness of the event and should be evaluated 
according to the following scales: 
1 = Mild - Discomfort noticed, but no disruption to daily activity 
2 = Moderate - Discomfort sufficient to reduce or affect normal daily activity  
3 = Severe - Inability to work or perform normal daily activity 
15.2.2. 
Causality Assessment for Adverse Events 
The Investigator or designee is responsible for assessing the relationship between AEs and the 
investigational product. Additionally, the Investigator or designee is responsible for providing 
appropriate treatment for the event and for adequately following the event until resolution. The 

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clinical Investigator or responsible designee should determine the investigational product 
relationship using the following explanations: 
Unrelated: an AE that is clearly and incontrovertibly due to extraneous causes (disease, 
environment, etc.) and does not meet the criteria for ‘possible’ or ‘probable.’ 
Possible: the association between the AE and study treatment appears unlikely, but cannot be 
ruled out with certainty. An AE may be considered ‘possibly related’ if it meets at least 2 of the 
following criteria: 
• It follows a reasonable temporal sequence from administration of investigational 
product. 
• It may readily have been produced by the subject's clinical state or by 
environmental or toxic factors. 
• It follows a known response pattern to investigational product. 
Probable: an AE that is considered to be related to investigational product with a high degree of 
certainty. An AE may be considered probably related if it meets all of the following criteria: 
• It follows a reasonable temporal sequence from administration of investigational 
product. 
• It cannot be reasonably explained by the known characteristics of the subject's 
clinical state. 
• It follows a known pattern of response to investigational product treatment. 
• It reappears upon re-challenge. 
Table 6 lists AEs that are common in this subject population, even in the absence of exposure to 
the study drug. The Investigator may use this as guidance while assessing the causality. If these 
events are deemed as an adverse drug reaction during evaluation, the Sponsor will follow the 
appropriate reporting procedures. 
 
 

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Table 6: 
Adverse Events Common to the PAH Population 
MedDRA System Organ Class 
Preferred Term 
Cardiac disorders 
Palpitations 
Tachycardia 
Dizziness 
Pre-syncope 
Syncope 
Oedema 
Ascites 
Chest pain 
Right ventricular heave 
Right ventricular dysfunction 
Cardiac failure 
General disorders and administration site conditions 
Lethargy 
Nausea 
Vomiting 
Hepatobiliary disorders 
Hepatomegaly 
Investigations 
Heart rate irregular 
Metabolism and nutrition disorders 
Thirst 
Psychiatric disorders 
Depression 
Respiratory, thoracic and mediastinal disorders 
Acute respiratory failure 
Bronchitis 
Dyspnoea at rest 
Dyspnoea exertional 
Dyspnoea paroxysmal nocturnal 
Cough 
Hypoxemia 
Orthopnoea 
Upper respiratory tract infection 
Vascular disorders 
Raynaud’s phenomenon 
 
 

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15.3. 
Outcome Assessment for Adverse Events 
The outcome assessment for an AE will be defined as follows: 
• resolved 
• resolved with sequelae 
• ongoing 
• death 
• unknown 
Pregnancy occurring in a subject is not considered an AE or SAE; however, the Investigator 
must collect pregnancy information for female study subjects or female partners of male study 
subjects if the fetus could have been exposed to the investigational device. Any pregnancy 
should be reported to the Sponsor using the Serious Adverse Event Report Form (SAE Report 
Form). Delivery details and the neonatal outcome must be recorded and reported. 
15.4. 
Collection, Recording and Reporting of Adverse Events and 
Investigational Product Complaints/Deficiencies 
15.4.1. 
Collection of Adverse Events and Serious Adverse Events 
Any AE occurring prior to signing the ICF should be considered medical history or a pre-
existing condition, and will be collected on the Medical History eCRF. Findings at Screening 
from physical exam, baseline laboratory results, etc. should also be considered medical history or 
pre-existing condition and be recorded accordingly. 
At each visit, the Investigator will determine whether any AE has occurred and if it is related to 
the investigational product. Subjects will also be instructed to contact the site to report any AE 
that occurs between study visits. For randomized subjects, AEs and SAEs will be collected from 
signing of the ICF through the EOS and entered on the AE section of the eCRF. 
SAEs (including those related to investigational product complaints/deficiencies) occurring from 
signing of the ICF through the EOS will be reported to Bellerophon Pulse Technologies Drug 
and Device Safety Department or their designee within 24 hours of an Investigator becoming 
aware of the event, using the AE/SAE page in the eCRF. 
As laboratory abnormalities may fall into the category of expedited reporting, the Investigator 
will review the clinical laboratory test results in a timely fashion. Only those results qualifying as 
AEs/SAEs will be recorded in the AE section of the eCRF.  
Adverse events will be coded according to the most current version of MedDRA in use. All 
medical device deficiencies associated with a SAE will be coded and reported as required.  
For consented subjects who are screen failures prior to randomization, AEs will not be collected 
after the subject fails to qualify for randomization. 
 

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15.4.2. 
Collection of Investigational Product Complaints/Deficiencies 
Information is collected on investigational product complaints/deficiencies from the 
Investigators. An investigation of an investigational product complaint/deficiency is performed 
to determine the root cause by the Sponsor. This will include evaluation of the reported 
complaint details, and data from the device service log when downloaded by the Sponsor. Details 
of collection of investigational product complaints/deficiencies will be provided to the sites in a 
separate site instruction. In the case of a device deficiency, the remaining investigational product 
study materials must be returned to the Sponsor and/or their designee for further investigation.   
15.4.3. 
Serious Adverse Events and Medical Device Deficiency Reporting 
The Sponsor shall be responsible to submit all appropriate documentation to all governing Health 
Authorities in accordance with local laws, regulations, and standards.  
Any SAR that is both serious and unexpected will be considered reportable for the 
investigational product and will be handled as such by the Sponsor. 
The following events will be considered reportable for the investigational product and will be 
handled as such by the Sponsor: 
1. Any associated with an SAE 
2. Any investigational medical device deficiency that might have led to an SAE if: 
a. suitable action had not been taken; or  
b. intervention had not been made; or  
c. if circumstances had been less fortunate 
3. New findings and/or updates in relation to already reported events 
4. Any events that require remedial action 
Notification of any SAE or investigational medical device deficiency, whether or not associated 
with the drug or device, by Investigators to the Sponsor is required within 24 hours. The 
reporting of SAEs or investigational medical device deficiencies will be conducted in accordance 
with ICH E2A (Clinical Safety Data Management: Definitions and Standards for expedited 
reporting) and local regulatory guidelines. 
Any SAE must be reported on the AE/SAE eCRF in the InForm clinical database at the study 
site within 24 hours of the site staff becoming aware of the event or investigational medical 
device deficiency.    
The initial AE/SAE eCRF entry in the InForm clinical database will include a detailed 
description of the event including start and stop dates, relationship, severity, and outcome 
assessments by the Investigator. While the AE/SAE eCRF should be completed with all 
necessary information including laboratory test results and diagnostic information, the 
information recorded on the eCRF may be supported, as appropriate, with written copies of 
medical records, autopsy reports, and other appropriate documents. Follow-up information 
(including information requested by the Sponsor) should be reported within 24 hours of 
availability.  Any additional supporting documentation should be faxed to: 
 

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Pharmacovigilance Dept. 
Fax: 1-844-332-7371 
Email: btdrugsafety@bellerophon.com 
If you have specific questions regarding the reporting of SAEs, you should contact the local 
Medical Monitor.  
15.4.3.1. Site Reporting to IRB/IEC 
The Investigator must also notify the local IRB/IEC which approved the study of any SAEs, AEs, 
or device deficiencies, in accordance with local health authority guidelines. 
15.4.3.2. Sponsor Reporting to Regulatory Authorities, Investigators, and Independent 
Ethics Committee 
The Sponsor will notify the relevant Regulatory Authorities and all participating Investigators of 
reports of potential safety risks from clinical studies or any other source, in accordance with 
applicable regulations. Upon notification of an event, the Sponsor will determine the need for 
reporting and the timeline for reporting in each active country. The reporting of SAEs will be 
conducted in accordance with ICH E2A (Clinical Safety Data Management: Definitions and 
Standards for expedited reporting) and local regulatory guidelines.  
Upon request, the Sponsor shall report the results of device deficiency evaluations to Regulatory 
Authorities and participating Investigators. Where applicable, Investigators will submit this 
information to their local IRB/IEC. 
All AEs, SAEs, and device deficiencies will be reported to the regulatory authorities and IECs in 
accordance with the current country specific regulatory and IRB/IEC requirements. These will be 
outlined in the Safety Management Plan for this study. 
15.5. 
Steering Committee 
This study will be designed and conducted under the direction of a Steering Committee (SC) 
made up of clinicians experienced in pulmonary and cardiovascular research, who will be 
responsible for the protocol and data collection tool, oversight of study execution, review, and 
publication of the data. The SC will also review and screen requests for access to the data for the 
purpose of secondary publications. The members will be global. 
.  
A SC charter will be developed with input from the SC and the Sponsor. 
15.6. 
Data Monitoring Committee 
The members of the Data Monitoring Committee (DMC) will be experienced clinicians in the 
care of PAH subjects and experienced in the conduct of trials in PAH. A DMC will review data 
at predefined times as described in the DMC charter and make decisions regarding early 
termination of the study, as well as dosing cohort decisions. In order to protect the safety of 
subjects in this study, the DMC will alert the Sponsor if there is any safety concern based on the 
accumulated data. The DMC will also advise on the appropriateness of continuing the study due 

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to any safety concern. All SAEs will be sent to the DMC in a timely manner for review. Protocol 
violations will be reviewed on a quarterly basis (or more frequently if needed) per site.  
A DMC charter will be developed with input from the DMC committee members, the SC and the 
Sponsor.   
15.7. 
Independent Clinical Events Committee 
The members of the ICEC will be experienced clinicians in the care of PAH subjects and 
experienced in adjudication for clinical trials in PAH. The ICEC will review and adjudicate the 
following: 
• All SAEs 
• Rebound PH 
• Subject eligibility when eligibility may be unclear 
An independent research organization experienced in the adjudication of cardiovascular events 
will supervise the collection of data on all events. They will maintain a website where the 
committee members can access the data, determine the need for more data, and record their 
findings. The research organization will coordinate all ICEC meetings and be responsible for 
transferring the adjudication data to the Sponsor.   
The data presented to the ICEC members will be reviewed and any information that may lead to 
un-blinding of the reviewer will be removed.   
The Sponsor, appointed research organization, and ICEC will create a pre-determined SMQ list 
to capture all potential event terms that may be reported and attributed to PAH. Once all parties 
come to agreement on the list, the electronic adjudication system (EAS) will be programmed to 
identity potential events for adjudication based on the SMQ list. All AEs will be imported into 
the EAS and compared against the SMQ programmatically. Events will be managed on a daily 
basis by adjudication staff. Adjudication staff will collect essential elements for review by the 
ICEC.  
An ICEC charter will be developed with input from the ICEC members, the steering committee, 
research organization and the Sponsor.   

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16. 
STATISTICAL CONSIDERATIONS 
This section provides a general description of the statistical methods to be used in analyzing both 
safety and efficacy data. The key statistical issues or considerations will be addressed. A more 
detailed statistical analysis plan will be provided in a separate document that will be finalized 
before unblinding of treatment assignment. 
Unless otherwise specified, all statistical tests will be one-sided with a significance level of 
0.025. Summary statistics will be provided for all study variables with descriptive statistics 
(number of observations, mean, standard deviation, median, minimum, and maximum) for 
numerical (or continuous) variables and with frequency and percentage for categorical variables. 
All statistical analysis will be conducted using SAS version 9.2 or higher (SAS Institute Inc., 
Cary, NC). 
16.1. 
Population(s) for Analysis 
An intent-to-treat (ITT) population that consists of all randomized subjects who remained 
eligible after the Run-in period will be used for all the efficacy analyses: subjects will be 
analyzed in the treatment group to which they were randomized  
A safety population that includes all randomized subjects who receive the study treatment and 
who remained eligible after the Run-in period will be used for all the safety analyses. In addition, 
an analysis of safety for all randomized subjects who receive the study treatment and who 
became ineligible after the Run-in period will be conducted.  For the safety population, subjects 
will be summarized according to the treatment they received during the study. 
16.2. 
Sample Size Determination 
Interim Analysis will be conducted by an independent DMC after 18-week 6MWD data are 
available from 75 patients.  The purpose of the interim analysis is to stop the trial for an early 
efficacy or futility conclusion or to continue the trial to 150 or 188 - patients (total randomized is 
higher to account for an anticipated 20% dropout rate).  Group sequential early stopping criteria 
and sample size re-estimation methodology are further described in the statistics section of this 
protocol.  They are constructed to control overall type 1 error at 0.025, 1-sided.  Simulations 
assuming true underlying mean treatment difference in 6MWD ranging from 30-70 meters and  
standard deviations from 50 to 75 meters yielded >87% power for all cases except the most 
extreme case (mean difference 30 meters and SD 75), for which power was ~71%.   
Subjects who do not comply with the required device adherence, as well as who do not meet the 
study entry criteria at Week 2, will be withdrawn from the study.  
16.3. 
Efficacy Analyses 
16.3.1. 
Primary Efficacy Endpoint 
The primary endpoint is to evaluate the efficacy of iNO as measured by the placebo-adjusted 
change in 6-minute walk distance (6MWD) from baseline to 18 weeks. The average of the two 
6MWDs at Week 2 (after run-in) will be used as the baseline value for analysis of data. The 

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6MWD at Week 2 should be obtained on all subjects, even if the subject does not qualify to enter 
into the treatment phase. 
The primary statistical test for the primary endpoint will be performed using a repeated measures 
mixed model with the baseline stratification factor (i.e., the prostanoid usage status), - treatment 
arm, week, and treatment-by-week interaction as the main effects. As a covariate, baseline 
6MWD assessment will be included in the model. In case the normality assumption is 
substantially violated (i.e., graphical assessment of residuals from the analysis model and the 
Shapiro-Wilk test statistic graphical assessment of the residuals from the analysis model and), 
the primary efficacy endpoint will be analyzed using the van Elteren test stratified by the 
prostanoid usage status. Least Squares mean differences, standard errors, 95% confidence 
intervals will be derived from the analysis model.   
Exploratory analyses will be performed to evaluate the effects of demographics and baseline 
characteristics on the efficacy response with appropriate statistical methods. Subgroup analyses 
based on study drug usage, background therapies, demographics and baseline characteristics, as 
well as other study compliance status will be conducted. Additional statistical methods such as 
mixed effects model and Cochran–Mantel–Haenszel (CMH) test (for dichotomized response 
analysis) may be utilized in the exploratory analyses. 
16.3.2. 
Secondary Efficacy Endpoints 
The secondary efficacy endpoints include: 
1. TTCW*: The time (in days) from start of treatment to first event (first day the event is 
noted), with iNO as compared to placebo, measured from baseline to week 18. TTCW 
event is defined as any of the following: 
a. Death (all-cause mortality) 
b. Atrial septostomy 
c. Hospitalization due to worsening of PAH (adjudicated) 
d. Start of new specific PAH treatment (endothelin receptor antagonists [ERAs], 
phosphodiesterase type-5 [PDE-5] inhibitors or prostanoids), an increase in the dose 
of an ERA or PDE-5, increase in the dose or frequency of an inhaled prostanoids, or 
an increase in the dose of an intravenous or subcutaneous prostanoids by >10%. 
e. Decrease of >15% from baseline or > 30% compared with the last study related 
measurement in 6MWD and should be confirmed by a repeat measurement performed 
at least 14 days later 
f. Worsening of WHO Functional Class (e.g., from Class II to Class III or IV, OR Class 
III to Class IV); and should be confirmed by a repeat assessment at least 14 days later  
2.   Change in WHO Functional Class, with iNO as compared to placebo, from baseline to 18     
weeks.  
The TTCW endpoint will be analyzed with log-rank test stratified by the prostanoid usage status. 
The censoring time points for the analyses include the time points at which subjects drop out of 
the study or complete the study without any of the specified events.    
The WHO Functional Class endpoint will be analyzed with the same method as that for the 
primary endpoint. Change from baseline to week 18 will also be evaluated as an exploratory 
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16.3.3. 
Tertiary Endpoints 
1. Change in health-related quality of life (using SF-36 version 2 health survey), with iNO 
as compared to placebo, from baseline to 18 weeks  
2. Change in pulmonary hemodynamics (i.e., cardiac output [CO], cardiac index [CI], mean 
pulmonary artery pressure [mPAP], mean pulmonary capillary wedge pressure 
[mPCWP], systolic pulmonary artery pressure [sPAP], diastolic pulmonary artery 
pressure [dPAP], pulmonary vascular resistance [PVR], and oxygen saturation by pulse 
oximeter [SpO2], mixed venous O2, and right atrial pressure [RAP]) measured by right 
heart catheterization (RHC), with iNO as compared to placebo, from baseline to 18 
weeks, in a subset of subjects (approximately 50), at selected sites 
3. Change in echocardiogram measurements right ventricular function (including right 
ventricular fractional area change, systolic pulmonary artery pressure [sPAP], tricuspid 
annular motion/tricuspid annular plane systolic excursion, tricuspid annular systolic 
velocity, and Tei index) and left ventricular function (including left ventricular ejection 
fraction [LVEF], LV size, and improvement in LV early diastolic relaxation velocity), 
with iNO as compared to placebo, from baseline to 18 weeks, in a subset of subjects 
(approximately 50), at selected sites 
4. Change in NT-proBNP, with iNO as compared to placebo, from Screening to 18 weeks  
5. Change in Borg dyspnea score immediately following 6MWT, with iNO as compared to 
placebo, from baseline to 18 weeks  
6. Change in 6MWD as related to degree of drug adherence, with iNO as compared to 
placebo, from baseline to 18 weeks  
7. The number of subjects with unsatisfactory clinical response, with iNO as compared to 
placebo, from baseline to 18 weeks. Defined as: WHO Functional Class III or IV 
symptoms with no improvement in 6MWD 
8. Number of subjects undergoing heart-lung or lung transplantation, number of subjects 
listed for transplantation, and deaths while awaiting transplantation, from baseline to 18 
weeks  
9. Medical resource utilization, with iNO as compared to placebo, from baseline from 
baseline to 18 weeks 
For continuous (or numerical) response endpoints, the statistical analyses will be performed 
using the same method as that for the primary efficacy endpoint. Binary (or dichotomized) 
response endpoints will analyzed by CMH test stratified by the prostanoid usage status.  

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16.3.4. 
Multiplicity Adjustment 
To control the Type-1 error rate at a level of 0.025 1-sided, a hierarchal gate keeping procedure 
will be applied to test the significant difference between the treatment groups in the primary and 
secondary endpoints in the following order:  
1. 6MWD  
2. TTCW 
3. WHO Functional Class 
Each test will be evaluated at the appropriate p-value alpha spending function.  The procedure 
will stop if lack of significance is found for any of the variables and the remaining test(s) in the 
sequence (as mentioned above) will also be concluded as non-significant. 
16.3.5. 
Handling Missing Data 
Missing data imputation for primary endpoint:  
For primary analysis, i.e. change from baseline at Week 18, missing data will not be imputed. 
The following missing data imputation techniques will be employed for sensitivity analyses of 
primary endpoint. 
1) Last Observation Carry Forward (LOCF) approach will be applied for subjects not 
withdrawing trial due to adverse events, for subjects withdrawing trial due to adverse 
events (including deaths), worst value (for e.g. zero for 6MWD) will be assigned at EOS 
visit. 
2) Worst-case imputation approach I (i.e. impute the missing value for a subject with worst 
value (within the subject) for all subjects who withdraw prematurely for any reason. The 
value of zero for 6MWD will be imputed for all deaths. 
3) Worst-case imputation approach II (i.e., impute the missing value for a subject in the 
active and Placebo dose group by the worst result of all subjects with non-missing 
assessments in their respective assigned dose groups). The value of zero for 6MWD will 
be imputed for all deaths. 
4) Worst-case imputation approach III (i.e. impute the missing value for a subject in the 
active dose group by the worst result of all subjects with non-missing assessments in the 
same active dose groups and impute the missing value for a subject in placebo group by 
his/her last available assessment prior to the missing assessment. The value of zero for 
6MWD will be imputed for all deaths. 
Missing data imputation for secondary endpoint:  
For all the other efficacy endpoints, the last observation carry forward (LOCF) approach will be 
used in handling the missing data as that used in the EARLY study (Galiè 2008). 
16.4. 
Safety Analyses 
Adverse events will be coded using the MedDRA dictionary. AEs (events that are new in onset or 
aggravated in severity following treatment) will be summarized under each dosing cohort, by 

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system organ class (SOC) and preferred term (PT). Comparisons between dosing cohorts will be 
made using Fisher’s exact test for the proportion of subjects with a particular AE (grouped under 
one preferred term). Serious AEs (including death) will be summarized. In addition, AEs will be 
summarized by severity and relation to study drug.  
Adverse events of special interest (AESI) include: 
•
Respiratory related AEs
•
Epistaxis
•
Syncope (new onset, or if history of syncope, recurrent syncope events)
•
Clinically significant signs and/or symptoms (as determined by the Investigator)
consistent with rebound PH (e.g., systemic hypotension, change in heart rate, new
onset syncope, or decreased systemic oxygenation) temporally associated with acute
withdrawal and including those associated with device malfunction or failure.
Other safety evaluations include: 
1. Incidence of device malfunction and/or device failure leading to an AE
2. Incidence of rebound PH
3. Clinically significant changes in the following:
a.
Clinical laboratory tests
b. Pulmonary function tests
c.
Vital signs
All safety data will be summarized by treatment groups with descriptive statistics or frequency 
table. 
16.5. 
Interim Analysis 
A formal interim analysis is planned in this study as follows: 
1. Stop for futility (null hypothesis is accepted; there is no difference between iNO and
Placebo).
2. Stop for efficacy (null hypothesis is rejected; there is difference between iNO and
Placebo favoring iNO).
3. Sample size determination (decision to use blinded or unblinded data).
4. Stop in case of safety concerns. Safety concerns may be some imbalances in adverse
events frequency which is not in favor of iNO. No formal statistical guideline is provided
for this purpose, the sponsor relies on the medical expertise of DMC members.
5. Continue the trial with the planned sample size until next stage if point 1, 2 or 4 not
apply.
The following two designs will define the interim analysis strategy: 
1) Design 1: Groups Sequential Design (for efficacy part)
2) Design 2: Sample Size Re-estimation (SSR) (for futility and sample size re-estimation)

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The interim analysis schedule planned as follows: 
Schedule 
Requirement 
1st 
After 75 patients complete 18 Weeks of 
blinded treatment phase. 
Final 
After 150/188 (depending on CP and 
PP) patients complete 18 Weeks of 
blinded treatment phase. 
Traditional group sequential design (GSD) alpha spending function Gamma=-3 (Hwang, Shih, 
deCani, 1990) is used to control the overall type 1 error at 0.025, 1-sided. The interim analysis 
rule (Table 7) is as follows. 
Table 7: 
Interim and Final Analysis Rules 
Category 
Rule 
Efficacy 
At first interim analysis (after 75 patients), if the one-sided p<0.0046 then the study 
will stop for efficacy (Wald Statistics) 
Efficacy 
At final analysis (after 150 patients or 188 patients depending on CP and PP), if the 
one-sided p < 0.0229 then the study will yield an efficacy conclusion. (based on CHW 
Statistics) 
Futility 
If conditional power (CP) or predictive power (PP) ≤ 10% then the study stops for 
futility. 
Continue 
If 10% < CP and PP < 30% then trial continues to 150 patients. 
SSR 
If 30% ≤ CP or PP < 80% then the sample size required to boost the CP or PP to 80% 
is computed. If this sample size exceeds 188 (upper limit) then the study continues at 
N = 150 else to 188. 
Continue 
If CP and PP ≥ 80% then the trial continues to N = 150 patients 
This is the "promising zone" sample size re-estimation (SSR) design of Mehta & Pocock (2011), 
which uses the Cui, Hung, Wang (1999) method of analysis to combine the test statistics for the 
separate analyses of the IA and post-IA parts of the trial, if the trial does not stop at IA.   
The final analysis is via weighted Z statistic using equal weights for the IA and post IA test 
statistics.  It requires p<0.0229 1-sided for statistical significance to control the overall type 1 
error level at 0.025 1-sided per the gamma=-3 error spending function (Hwang, Shih, deCani 
1990). 

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17. 
MONITORING PROCEDURES 
17.1. 
Study Monitoring 
The study will be periodically monitored and/or audited by a representative of Bellerophon Pulse 
Technologies LLC. It is the responsibility of the Principal Investigator or responsible designee to 
provide all study records, including, but not limited to, case report forms and source 
documentation, to the monitor and/or auditor at their visit.  
Regulatory Agencies, in the person of a scientifically trained and properly authorized employee 
of the Agency, may request access to all study records, including source documents, for 
inspection and copying.  
The site’s Institutional Review Board/Independent Ethics Committee (IRB/IEC) may also review 
their individual site’s study records, including, but not limited to, case report forms and source 
documentation at any time. 

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18. 
RESPONSIBILITIES 
18.1. 
Quality Control and Quality Assurance 
Prior to study initiation, there will be an Investigator meeting and/or individual site initiation 
visits to prepare Investigators and study staff, and to standardize performance at each study 
center associated with the study. Data will be collected by the study site coordinator and/or 
designee as specified on the site’s “Signature Sheet and Delegation of Responsibility Log” and 
verified at the site by the clinical research associate (CRA). These data will be monitored and 
verified to the original medical records. Data will be entered by trained and qualified study site 
personnel into a validated EDC system managed by the Sponsor. Changes to the data will be 
made by the research team at the site according to ICH GCP styles of recording data and will be 
documented via an audit trail. 
18.2. 
Audits and Inspections 
To ensure compliance with GCP and all applicable regulatory requirements, Bellerophon Pulse 
Technologies LLC may conduct a quality assurance audit. Regulatory agencies and other 
governing bodies may also conduct a regulatory inspection of this study. 
To ensure compliance with the protocol, GCPs, and all applicable regulatory requirements, 
Bellerophon Pulse Technologies LLC or an independent third party on behalf of the Sponsor, 
may conduct a quality assurance audit. Regulatory agencies or the local health authority may 
also conduct a regulatory inspection of this study. Such audits/inspections can occur at any time 
during or after completion of the study. If an audit or inspection occurs, the Investigator and 
institution agree to allow the auditor/inspector direct access to all relevant documents and 
allocate his/her time and the time of his/her staff to the auditor/inspector to discuss findings 
and/or any relevant issues. The Investigator will be informed of such audit(s). 
18.3. 
Investigator and Study Staff Requirements 
All Investigators must be qualified by training and experience to conduct the proposed research, 
and must accept responsibility for all research activities at their site.  
Prior to study initiation, the Investigator will complete and submit to the Sponsor all documents 
required by 21 CFR Part 50, 56, and 312, ISO 14155, and/or ICH (E6) (Section 8.0), including 
financial disclosure information as required. Additionally, each Investigator must assure the 
study staff is qualified by training and experienced to assist with the proposed research. This 
training must be documented and maintained at the study site. 
Upon completion or termination of the study, the Investigator will submit a final written report to 
the IRB/IEC. The Investigator will provide the Sponsor or designee with copies of all IRB/IEC 
actions regarding the study. 

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19. 
DATA MANAGEMENT AND RECORDKEEPING 
19.1. 
Electronic Case Report Forms 
Electronic case report forms are created using a validated EDC system. They are to be completed 
in English for all subjects. Table 8 below lists the roles and access levels for this study.  
Table 8: 
Roles and Access Levels to Remote Data Capture System 
Role/Privilege 
Data 
Manager 
CRA 
Site 
Coordinator 
Investigator 
Reviewer 
Browse
Y 
Y 
Y 
Y 
Y 
Update Data 
N 
N 
Y 
N/Ya 
N 
Update 
Discrepancy 
Y 
Y 
Y 
Y 
N 
Verify 
N 
Y 
N 
N 
N 
Approve 
N 
N 
N 
Y 
N 
a Data update privileges may be granted upon specific request following completion of the required training. 
Entered data will be reviewed manually and electronically for consistency and correctness with 
the protocol. All discrepancies will be forwarded to appropriate EDC users for resolution. An 
electronic audit trail will be maintained to track all changes to the database. 
Refer to study specific eCRF completion guidelines for further details. 
19.2. 
Case Report Forms  
Electronic Case Report Forms are to be completed for all consented subjects. For subjects who 
sign the ICF but are subsequent screen failures, no AE or SAE data will be collected after these 
subjects fail to meet eligibility criteria and do not to qualify for randomization.  
All eCRF will be completed in a timely fashion, preferably within 5 days after the subject visits, 
which will enable timely monitoring visits. 
19.3. 
External Data 
Any data that is collected electronically will be uploaded from the vendor’s database to 
Bellerophon Pulse Technologies database via secure transfer. Details of this process will be 
coordinated with the vendor and described in a Data Transfer Specifications document. 
Laboratory data that is collected locally by the site will be entered directly in the eCRF. 
19.4. 
Inspection of Records 
In compliance with local regulations, US Federal regulations and ICH GCP guidelines, it is 
required that the Investigator and institution permit authorized representatives of the Sponsor, of 
the regulatory agency(s), and the IEC direct access to review the subject’s original medical 
records for verification of study-related procedures and data. Direct access includes examining, 
analyzing, verifying, and reproducing any records and reports that are important to the evaluation 
of the study. The Investigator is obligated to inform the subject and obtain their consent to permit 
Table 8 

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named representatives to have access to his/her study-related records without violating the 
confidentiality of the subject. 
19.5. 
Retention of Records/Critical Documents  
In compliance with ICH GCPs and applicable regulatory requirements, copies of all records 
(e.g., informed consent documents, laboratory data slips, source documents, safety reports, test 
article dispensing records) which support the eCRFs, must be retained in the files of the 
responsible Investigator for a minimum of 2 years (for EU: records to be retained for 15 years) 
following notification by Sponsor that all investigations at all sites are completed, terminated, or 
discontinued. If the Investigator retires, relocates, or for other reasons withdraws from the 
responsibility of keeping the trial records, custody must be transferred to a person who will 
accept the responsibility. Bellerophon Pulse Technologies LLC must be notified in writing of the 
name and address of the new custodian. 

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20. 
ETHICS 
The study will be conducted in accordance with this protocol, the principles that have their 
origins in the Declaration of Helsinki, as well as ICH GCP and applicable federal, state, and 
local regulatory requirements. All essential documents will be archived. 
The protocols and local ICFs must be reviewed and approved by each of the participating 
institutions’ IRB/IEC prior to the initiation of subject recruitment. The IRB/IEC must be notified 
of all subsequent protocol amendments. In addition, progress reports will be submitted to the 
IRB/IEC by the Investigator as indicated by IRB/IEC’s guidelines. Each IRB/IEC must meet the 
FDA’s, and/or European Medicines Agency (EMA), International Conference on Harmonization 
(ICH), and any additional state and/or national requirements for composition, documentation, 
and operational procedures.  
The Investigator shall provide the Sponsor with the IRB/IEC’s written notification of approval 
along with the IRB/IEC membership list and/or statement that the IRB/IEC operates in 
accordance with GCP. 
20.1. 
Informed Consent Form(s) for Study Subjects 
The informed consent must contain all elements required by the FDA under 21 CFR Part 50 and 
ICH (E6) (Section 4.8), as well as any other elements required by state, local and institutional 
policies and applicable ISO standards. All subjects (or legally authorized representative) must 
provide consent in writing after having had adequate time to ask questions and consider their 
participation in the study. Consent must be obtained before any protocol related procedures that 
are not part of the subject’s normal care. Written documentation of consent must be provided by 
signing a Bellerophon Pulse Technologies approved informed consent document. The date and 
time the consent was finalized should be recorded in the subject’s medical chart. The subject or 
their legal representative must receive a copy of a dated, and signed consent form according to 
ICH GCP guidelines. The exact definition of legal representative should be determined for a 
hospital by its IRB/IEC in compliance with local and state statutes. Subjects will be informed of 
any significant new finding developed during the course of the research that may affect their 
decision to continue participation. 
Failure to provide written informed consent renders the subject ineligible for the study. 
20.2. 
Independent Ethics Committee/Institutional Review Board 
20.2.1. 
Amendments to the Protocol  
Neither the Investigator nor the Sponsor will amend nor modify the protocol without written 
notification of the other. All amendments must be approved by the Sponsor prior to 
implementation. All amendments must be submitted to the IRB/IEC as required. The IRB/IEC 
must approve major amendments prior to implementation at the study site except in the case of 
ensuring subject safety, as required. 

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21. 
REPORTS AND PUBLICATIONS 
The Sponsor recognizes that the institution and/or Principal Investigator may desire to publish or 
present information related to the subject matter of the study. No such publication or 
presentation, including without limitation, any such publication or presentation by an individual 
Principal Investigator in a multicenter study, may occur without the express written approval of 
the Sponsor which approval shall not be unreasonably withheld.   
In the case of a multicenter study, no individual publication shall be made until after the planned 
multi-center publication, or 12 months after study completion, whichever shall first occur.  
In the event the Institution and/or Principal Investigator desire to make a publication or 
presentation, the Institution and/or Principal Investigator will provide a copy of the proposed 
publication or presentation of the study to the Sponsor 45 days prior to submission for 
publication or presentation in order to ascertain whether public disclosure will adversely affect 
patent rights, copyrights, or proprietary rights or any other interest of the Sponsor. In the event of 
objection by the Sponsor, for any reason, the institution and Principal Investigator further agree 
to delay the publication or presentation until modifications or revisions to the publication or 
presentation have been made which are mutually satisfactory to the Institution/Principal 
Investigator and the Sponsor. 
This trial will be listed on clinicaltrials.gov. 
 

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22. 
LIST OF REFERENCES 
1. Anderson JR, Nawarskas JJ. Pharmacotherapeutic management of pulmonary arterial 
hypertension. Cardiol Rev. 2010 May-Jun;18(3):148-62. 
2. Ashutosh K, Phadke K, Jackson JF, Steele D. Use of nitric oxide inhalation in chronic 
obstructive pulmonary disease. Thorax. 2000 Feb;55(2):109-13. 
3. ATS/ERS standardization of spirometry guidelines. Eur Respir J 2005; 26:319-338. 
www.thoracic.org/statements/resources/pfet/PFT2.pdf 
4. ATS statement: guidelines for the six-minute walk test. ATS Committee on Proficiency 
Standards for Clinical Pulmonary Function Laboratories. Am J Respir Crit Care Med 
2002;166(1):111-117. 
5. Badesch DB, Abman SH, Simonneau G, Rubin LJ, McLaughlin VV. Medical therapy for 
pulmonary arterial hypertension: updated ACCP evidence-based clinical practice 
guidelines. Chest. 2007 Jun;131(6):1917-28. 
6. Barst RJ, Gibbs JS, Ghofrani HA, Hoeper MM, McLaughlin VV, Rubin LJ, et al. 
Updated evidence-based treatment algorithm in pulmonary arterial hypertension. J Am 
Coll Cardiol. 2009 Jun 30;54(1 Suppl):S78-84. 
7. Benza RL, Miller DP, Gomberg-Maitland M, Frantz RP, Foreman AJ, et al. Predicting 
survival in pulmonary arterial hypertension: insights from the Registry to Evaluate Early 
and Long-Term Pulmonary Arterial Hypertension Disease Management (REVEAL). 
Circulation. 2010 Jul 13;122(2):164-72. Epub 2010 Jun 28. 
8. Channick RN, Newhart JW, Johnson FW, Williams PJ, Auger WR, Fedullo PF, Moser 
KM. Pulsed delivery of inhaled nitric oxide to patients with primary pulmonary 
hypertension: an ambulatory delivery system and initial clinical tests. Chest. 1996 
Jun;109(6):1545-9. 
9. Galiè N, Rubin L, Hoeper M, Jansa P, Al-Hiti H, Meyer G, et al. Treatment of patients 
with mildly symptomatic pulmonary arterial hypertension with bosentan (EARLY study): 
a double-blind, randomised controlled trial. Lancet. 2008 Jun 21;371(9630):2093-100. 
10. Germann P, Ziesche R, Leitner C, Roeder G, Urak G, Zimpfer M, Sladen R. Addition of 
nitric oxide to oxygen improves cardiopulmonary function in patients with severe COPD. 
Chest. 1998 Jul;114(1):29-35. 
11. Ghofrani HA, Galiè N, Grimminger F, Grünig E, Humbert M, Jing ZC, et al. Riociguat 
for the Treatment of Pulmonary Arterial Hypertension. N Engl J Med 2013;369:330-40.  
12. McGoon MD, Garvan CK. Pulmonary Hypertension: Diagnosis and Management. Mayo 
Clin Proc. 2009;84(2):191-207. 
13. McLaughlin VV, Archer SL, Badesch DB, et al. ACCF/AHA 2009 expert consensus 
document on pulmonary hypertension a report of the American College of Cardiology 
Foundation Task Force on Expert Consensus Documents and the American Heart 
Association developed in collaboration with the American College of Chest Physicians; 
American Thoracic Society, Inc.; and the Pulmonary Hypertension Association. J Am 
Coll Cardiol. 2009 Apr 28;53(17):1573-619. 

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14. McLaughlin W, et al. Randomized study of adding inhaled iloprost to existing bosentan  
in pulmonary arterial hypertension. Am J Respir Crit Care Med 2006;174(11):1257-1263. 
15. Olschewski H, Simonneau G, Galiè N, Higenbottam T, Naeije R, Rubin LJ, et al. Inhaled 
iloprost for severe pulmonary hypertension. N Engl J Med. 2002 Aug 1;347(5):322-9. 
16. Pérez-Peñate G, Cabrera Navarro P, Ponce González M, Górriz Gómez E, Pulido Duque 
J, et al. Long-term inhaled nitric oxide plus dipyridamole for pulmonary arterial 
hypertension. Respiration. 2005 Jul-Aug;72(4):419-22. 
17. Pérez-Peñate GM, Juliá-Serdà G, Ojeda-Betancort N, García-Quintana A, Pulido-Duque 
J, Rodríguez-Pérez A, et al. Long-term inhaled nitric oxide plus phosphodiesterase 5 
inhibitors for severe pulmonary hypertension. J Heart Lung Transplant. 2008 
Dec;27(12):1326-32. 
18. Ries AL. Minimally clinically important difference for the UCSD Shortness of Breath 
Questionnaire, Borg Scale, and Visual Analog Scale. COPD 2005;2:105-10. 
19. Rubin DB. Multiple Imputation for Nonresponse in Surveys.1987. New York, John 
Wiley & Sons, Inc. 
20. SF-36 Literature Construction of the SF-36 Version 2.0 Psychometric Considerations 
Translations Discussion, http://www.sf-36.org/tools/sf36.shtml. 
21. Vonbank K, Ziesche R, Higenbottam TW, Stiebellehner L, Petkov V, Schenk P, 
Germann P, Block LH. Controlled prospective randomised trial on the effects on 
pulmonary haemodynamics of the ambulatory long term use of nitric oxide and oxygen in 
patients with severe COPD. Thorax. 2003 Apr;58(4):289-93. 
22. Yung GL, Kriett JM, Jamieson SW, Johnson FW, Newhart J, Kinninger K, Channick RN. 
Outpatient inhaled nitric oxide in a patient with idiopathic pulmonary fibrosis: a bridge to 
lung transplantation. J Heart Lung Transplant. 2001 Nov;20(11):1224-7. 
23. Hwang IK, Shih WJ, and DeCani JS (1990). Group sequential designs using a family of 
type I error probability spending functions. Statistics in Medicine, 9, 1439-1445. 
24. Mehta CR and Pocock SJ (2011). Adaptive Increase in Sample Size when Interim Results 
are Promising: A Practical Guide with Examples. Statistics in Medicine30(28): 3267-84 
25. Cui L, Hung HM, Wang SJ. Modification of sample size in group sequential clinical 
trials. Biometrics. 1999 Sep;55(3):853–857. PMID: 11315017 
26. Miller, M.R., et al. General Considerations for Lung Function. Eur Respir J 2005; 
26:153-161 
 

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APPENDIX A. INSTRUCTIONS FOR 6MWT.  SIX MINUTE WALK TEST AND OXIMETRY 
(OXYGEN SATURATION, SPO2) 
A standardized Six-Minute Walk Test (6MWT) will be performed in accordance with the guidelines of the 
(American Thoracic Society 2002). The 6MWT should be performed indoors, along a long, flat, straight, 
enclosed corridor with a hard surface that is seldom traveled. The turnaround points should be marked (e.g. 
with a cone).  
The distance walked in six minutes (6MWD) will be calculated and recorded. If the patient discontinues 
the test prematurely, the time (mm:ss) and distance walked will be recorded. 
Requirement of rescue medication including requirement of oxygen therapy and any adverse events 
occurring during the 6MWT will be recorded.  
Oxygen therapy, oxygen should be given at their standard rate. Oxygen should be provided through an 
oxygen cylinder on a wheeled cart connected to the INOpulse device.  The INOpulse device should be 
attached to the oxygen cylinder. 
During the study the 6MWT should be done about the same time of day to avoid diurnal variation.  
REQUIRED EQUIPMENT  
1) Countdown timer (or stopwatch)  
2) Mechanical lap counter  
3) Two small cones to mark the turnaround points  
4) A chair that can be easily moved along the walking course  
5) Worksheets on a clipboard  
6) Oxygen tank and INOpulse device 
7) Sphygmomanometer  
8) Portable pulse oximeter 
PATIENT PREPARATION  
1) Comfortable clothing should be worn.  
2) Appropriate shoes for walking should be worn.  
3) Subjects should use their usual walking aids during the test (cane, walker, etc.).  
4) The subjects's usual medical regimen should be continued.  
5) A light meal is acceptable before early morning or early afternoon tests.  
6) Subjects should not have exercised vigorously within 2 hours of beginning the test.  
MEASUREMENTS  
1) Repeat testing should be performed about the same time of day to minimize intraday variability.  
2) A "warm-up" period before the test should not be performed.  
3) The patient should sit at rest in a chair, located near the starting position, for at least 10 minutes 
before the test starts. During this time, check for contraindications, measure pulse and blood 
pressure, and make sure that clothing and shoes are appropriate. Compete portion of CRF.  

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4) Measure and record baseline heart rate and oxygen saturation (SpO2) and follow manufacturer's 
instructions to maximize the signal and to minimize motion artifact. Make sure the readings are 
stable before recording. Note pulse regularity and whether the oximeter signal quality is 
acceptable.  
Instruct the patient as follows:  
"The object of this test is to walk as far as possible for 6 minutes. You will walk back and forth in this 
hallway. Six minutes is a long time to walk, so you will be exerting yourself. You will probably get out of 
breath or become exhausted. You are permitted to slow down, to stop, and to rest as necessary. You may 
lean against the wall while resting, but resume walking as soon as you are able.  
You will be walking back and forth around the cones. You should pivot briskly around the cones and 
continue back the other way without hesitation. Now I'm going to show you. Please watch the way I turn 
without hesitation."  
Demonstrate by walking one lap yourself. Walk and pivot around a cone briskly.  
"Are you ready to do that? I am going to use this counter to keep track of the number of laps you complete. 
I will click it each time you turn around at this starting line. Remember that the object is to walk AS FAR 
AS POSSIBLE for 6 minutes, but don't run or jog.  
Start now, or whenever you are ready."  
1) Position the patient at the starting line. You should also stand near the starting line during the test. 
Do not walk with the patient. As soon as the patient starts to walk, start the timer.  
2) Do not talk to anyone during the walk. Use an even tone of voice when using the standard phrases 
of encouragement. Watch the patient. Do not get distracted and lose count of the laps. Each time 
the participant returns to the starting line, click the lap counter once (or mark the lap on the 
worksheet). Let the participant see you do it. Exaggerate the click using body language, like using 
a stopwatch at a race.  
After the first minute, tell the patient the following (in even tones): "You are doing well. You have 5 minutes 
to go."  
When the timer shows 4 minutes remaining, tell the patient the following: "Keep up the good work. You 
have 4 minutes to go."  
When the timer shows 3 minutes remaining, tell the patient the following: "You are doing well. You are 
halfway done."  
When the timer shows 2 minutes remaining, tell the patient the following: "Keep up the good work. You 
have only 2 minutes left."  
When the timer shows only 1 minute remaining, tell the patient: "You are doing well. You have only 1 
minute to go."  
Do not use other words of encouragement (or body language to speed up).  
If the patient stops walking during the test and needs a rest, say this: "You can lean against the wall if you 
would like; then continue walking whenever you feel able." Do not stop the timer. If the patient stops before 
the 6 minutes are up and refuses to continue (or you decide that they should not continue), wheel the chair 

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over for the patient to sit on, discontinue the walk, and note on the worksheet the distance, the time stopped, 
and the reason for stopping prematurely.  
When the timer is 15 seconds from completion, say this: "In a moment I'm going to tell you to stop. When 
I do, just stop right where you are and I will come to you."  
When the timer rings (or buzzes), say this: "Stop!" Walk over to the patient. Consider taking the chair if 
they look exhausted. Mark the spot where they stopped by placing a bean bag or a piece of tape on the floor.  
1) Record the end of walk Borg dyspnea level  
2) Measure SpO2 and pulse rate from the oximeter and then remove the sensor.  
3) Record the number of laps from the counter  
4) Record the additional distance covered (the number of meters in the final partial lap) using the 
markers on the wall as distance guides. Calculate the total distance walked, rounding to the 
nearest meter, and record it on the worksheet.  
5) Congratulate the patient on good effort and offer a drink of water. 
 
References: 
(American Thoracic Society, 2002)