ARISE II (Analysis of Revascularization in Ischemic Stroke With EmboTrap) Study
Phase: NA
Conditions: Stroke, Ischemia
Sponsor: Neuravi Inc.

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ARISE II 
 
 
 
Analysis of Revascularization in Ischemic Stroke with 
EmboTrap® 
Clinical Investigation Plan 
Control number 
 
CIP002 rev 05 
VERSION DATE 28th June 2016 
 
 
 
 
 
Study Sponsor: 
Neuravi® Inc., 
51 JFK Parkway, First Floor West 
Short Hills, New Jersey, 07078 
 
 
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Revision History 
CIP002 Revision 01 
Initial draft submitted to FDA 
10th March 2015 
CIP002 Revision 02 
Revised to correct and address FDA considerations: 
1. Clarify implications of rescue therapy prior to 3 passes for the 
adjudication of results. 
2. Ensure patients who are treated with IV-tPA fall within the 
treatment window approved by FDA for IV-tPA. 
19th May 2015 
CIP002 Revision 03 
Revised to correct and address FDA considerations on enrollment. 
19th June 2015 
CIP 002 Revision 04 
Update to remove reference to “target” in definition of rescue 
therapy and to amend the inclusion 10. To use imaging for all 
timepoints and amend exclusion criteria to exclude pt.s with severe 
hypertension.  
10th March 2016 
CIP002 Revision 05 
Update to include a new size of EmboTrap device. Now includes 
sizes (5×21 mm and 5×33 mm). 
Increase the maximum patient enrolment allowed in the study from 
210 to 228 throughout the protocol. This accounts for the potential 
increase in number of “roll-in” patients in the study based on the 
number of US study sites. The evaluable cohort required, 176, 
remains the same. 
28th June 2016 
 
 
 

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SIGNATURE PAGE 
 
 
To be signed and returned to Sponsor, prior to study initiation. 
 
 
Trial Title: 
ARISE II (Analysis of Revascularization in Ischemic 
Stroke with EmboTrap®) Study 
Investigational Device: 
EmboTrap® Revascularization Device 
CIP Revision: 
CIP002 Revision 05 
 
 
Trial Sponsor: 
Neuravi Inc. 
 
 
I, 
, 
(name of principal investigator) 
 
  
_, 
(Specialty, e.g. anesthesiology, neurosurgery or other discipline) 
 
 
 
 
 
at the 
, 
(name of hospital) 
 
 
 
 
 
 
 
the undersigned, attest that I have read and understood this Protocol  specified  above and agree 
on its content and to abide by the above mentioned version and any subsequent amendments 
during my participation in the evaluation. I agree to perform and conduct the study as described 
in the protocol and in accordance with the relevant parts of the ICH Guidelines for GCP, the ISO 
14155:2011, 21 CFR 812, 21 CFR Part 820, 21 CFR Part 50, 21 CFR Part 11, 21 CFR 
Part 54, 21 CFR Part 56, the Declaration of Helsinki, and the pertinent individual country 
laws/regulations. 
 
 
 
 
  
_ 
Principal Investigator Signature 
Date 
 

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PROTOCOL CONFIDENTIALITY STATEMENT 
Information in this document contains trade secrets and commercial information that are 
privileged or confidential and may not be disclosed unless National or State laws or regulations 
require such disclosure. Subject to the foregoing this information may be disclosed only to those 
persons involved in the clinical study who have a need to know. All such persons must be 
instructed not to disseminate this information to others. 
 
Access to this document MUST be restricted to the following: 
 
• 
The investigator(s) for whom this document was prepared; 
• 
Co-Investigators and subordinates who participate under the direct authority and 
supervision of the Investigators; 
• 
Members of the Ethics Committee or Institutional Review Board of the Principal 
Investigator’s institution; 
• 
Representatives of the Competent Authority (i.e., government agency having regulatory 
jurisdiction) of the country (or countries) in which the study is to be conducted; 
• 
Representatives of the United States Food and Drug Administration, as applicable; 
• 
Employees and/or consultants of Neuravi. 
 
Any individual, group or institution obtaining confidential information on Neuravi, as a result of 
participation in this clinical study shall maintain the proprietary nature of confidential and 
technical information. Persons with authorized access to this document shall not photocopy, 
reproduce by any means nor reveal the contents of this document to any other person without 
the prior consent of Neuravi. 
These restrictions on disclosures shall apply equally to all future information supplied to you that 
is indicated as privileged or confidential. 
 

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LIST OF ABBREVIATIONS 
 
ADE 
Adverse Device Effect 
AE 
Adverse Event 
ASPECTS 
Alberta Stroke program early CT score 
CFR 
Code of Federal Regulations 
CIP 
Clinical Investigation Plan 
CRO 
Contract Research Organization 
CT 
Computed Tomography 
DSMB 
Data Safety Monitoring Board 
eCRF 
Case Report Form 
EDC 
Electronic Data Capture 
FDA 
Food and Drug Administration 
GCP 
Good Clinical Practice 
IA-tPA 
Intra-arterial tissue plasminogen activator 
ICF 
Informed Consent Form 
ICH 
Intracranial Hemorrhage 
IFU 
Instructions for Use 
ITT 
Intention-to-treat 
IV 
Intravenous 
IV-tPA 
Intravenous tissue plasminogen activator 
mITT 
Modified intention-to-treat 
MRI 
Magnetic Resonance Imaging 
mRS 
Modified Rankin Score 
mTICI 
modified Thrombolysis in Cerebrovascular Infarction 
NIH 
National Institutes of Health 
NIHSS 
National Institutes of Health Stroke Score 
pc- ASPECTS 
Posterior circulation ASPECTS 
PI 
Principal Investigator 
PP 
Per Protocol 
PRSAE 
Procedure Related Serious Adverse Event 
PTAE 
Pretreatment Adverse Event 
SAE 
Serious Adverse Event/Experience 
SADE 
Serious Adverse Device Effect 
SOP 
Standard Operating Procedure 
TEAE 
Treatment Emergent Adverse Event 
TFSO 
Time From Stroke Onset 
TICI 
Thrombolysis in Cerebrovascular Infarction 
TIMI 
Thrombolysis in Myocardial Infarction 
UADE 
Unanticipated adverse device effect 
 
 

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PROTOCOL SUMMARY 
 
Title 
ARISE II: Analysis of Revascularization in Ischemic Stroke with EmboTrap® 
Sponsor 
Neuravi Inc., 51 JFK Parkway, First Floor West, Short Hills, New Jersey, 
07078 
Principal 
Investigator 
US 
Co-Principal 
Investigator 
EU 
Dr. Osama Zaidat, MD, MS, FAHA, FAAN 
Stroke, Neurocritical Care, and Neurointervention 
Medical Director, Neuroscience and Stroke Programs  
St Vincent Mercy Medical Center 
2222 Cherry Street, Suite M200 
Toledo, Oh 43608 
 
Dr. Tommy Andersson, 
Departments of Neuroradiology and Clinical Neuroscience, Karolinska 
University Hospital and Karolinska Institutet, Karolinska vägen 1, SE-17176, 
Stockholm, Sweden. 
Department of Radiology, AZ Groeninge, President Kennedylaan 4, BE-8500 
Kortrijk, Belgium. 
Executive Steering 
committee 
Prof. Jeffery L. Saver 
Geffen School of Medicine at UCLA 
Director, UCLA Comprehensive Stroke Center 
710 Westwood Plaza 
Los Angeles, CA 90095, USA. 
Prof. Heinrich Mattle,  
MD 
Senior Consultant 
Dept. of Neurology, Inselspital 
University of Bern 
3010 Bern, Switzerland 
Investigational 
Device 
Neuravi® EmboTrap® Revascularization Device 
Study Design 
This is an open label, single arm, multi center, prospective clinical study of 
the safety and efficacy of the EmboTrap device in treating acute ischemic 
stroke patients who have a large artery occlusion in their neurovasculature. 
The study will include all consecutive patients treated with the EmboTrap 
device who meet the inclusion and exclusion criteria. 
Study Objective 
The study objective is to examine the recanalization efficacy of the 
EmboTrap device and its associated performance characteristics and to 
record associated clinical outcomes in a manner that facilitates relevant 
comparison of outputs with that of devices approved in the U.S. for clearing 
Large Vessel Occlusions. 
Enrolment 
176 subjects minimum (up to 228 may be enrolled) 
 
 

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Number of Sites 
Up to 30 sites. 
Device Description 
and Intended Use 
The EmboTrap device is a mechanical recanalization device. It is intended to 
clear large vessel occlusions in acute stroke patients via mechanical 
thrombectomy. It is designed for use in the anterior and posterior 
neurovasculature. Patients enrolled will be treated as described in the 
EmboTrap device Instructions for Use. 
Inclusion Criteria 
1. 
The patient or the patient’s legally authorized representative has 
signed and dated an Informed Consent Form. 
2. 
Aged between 18 years and 85 years (inclusive). 
3. 
A new focal disabling neurologic deficit consistent with acute 
cerebral ischemia. 
4. 
NIHSS score ≥8 and ≤25. 
5. 
Pre-ictal mRS score of 0 or 1. 
6. 
The interventionalist estimates that at least one deployment of the 
EmboTrap device can be completed within 8 hours from the onset 
of symptoms. 
7. 
Patients for whom IV-tPA is indicated and who are available for 
treatment, are treated with IV-tPA. 
8. 
IV-tPA, if used, was initiated within 3 hrs of stroke onset (onset time 
is defined as the last time when the patient was witnessed to be at 
baseline), with investigator verification that the subject has 
received/is receiving the correct IV t-PA dose for the estimated 
weight. 
9. 
Angiographic confirmation of an occlusion of an ICA (including T or L 
occlusions), M1 or M2 MCA, VA, or BA with mTICI flow of 0 – 1. 
10. 
For strokes in the anterior circulation, the following imaging criteria 
should also be met: 
a. 
MRI criterion: volume of diffusion restriction visually 
assessed ≤50 mL. 
OR 
b. 
CT criterion: ASPECTS 6 to 10 on baseline CT or CTA-source 
images, or, volume of significantly lowered CBV ≤50 mL. 
11. 
The patient is indicated for neurothrombectomy treatment by the 
interventionalist and it is confirmed by diagnostic angiography that 
the device will be able to reach the target lesion proximally. 
Exclusion Criteria 
1. 
Life expectancy likely less than 6 months. 
2. 
Females who are pregnant or breastfeeding. 
3. 
History of severe allergy to contrast medium. 
4. 
Known nickel allergy at time of treatment. 
5. 
Known current use of cocaine at time of treatment. 
 
 

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6. 
Patient has suffered a stroke in the past 3 months. 
7. 
The patient presents with an NIHSS score <8 or >25 or is physician 
assessed as being in a clinically relevant uninterrupted coma. 
8. 
Subject participating in another study involving an investigational 
device or drug. 
9. 
Use of warfarin anticoagulation or any Novel Anticoagulant with 
International Normalized Ratio (INR) >3.0. 
10. Platelet count <50,000/μL. 
11. Glucose <50 mg/dL. 
12. Any known hemorrhagic or coagulation deficiency. 
13. Unstable renal failure with serum creatinine >3.0 or Glomerular 
Filtration Rate (GFR) <30. 
14. Patients who have received a direct thrombin inhibitor within the 
last 48 hours; must have a partial thromboplastin time (PTT) less 
than 1.5 times the normal to be eligible. 
15. All patients with severe hypertension on presentation (SBP > 220 
mmHg and/or DBP > 120 mm Hg). All patients, in whom 
intravenous therapy with blood pressure medications is indicated, 
with hypertension that remains severe and sustained despite 
intravenous antihypertensive therapy (SBP >185 mmHg and/ or DBP 
>110 mmHg). 
16. Known cerebral vasculitis. 
17. Rapidly improving neurological status. 
18. Clinical symptoms suggestive of bilateral stroke or stroke in 
multiple territories. 
19. Ongoing seizure due to stroke. 
20. Evidence of active systemic infection. 
21. Known cancer with metastases. 
22. Computed tomography (CT) or Magnetic Resonance Imaging (MRI) 
evidence of recent/ fresh hemorrhage on presentation. 
23. Baseline computed tomography (CT) or MRI showing mass effect or 
intracranial tumor (except small meningioma). 
24. Suspicion of aortic dissection, presumed septic embolus, or 
suspicion of bacterial endocarditis. 
25. Stenosis, or any occlusion, in a proximal vessel that requires 
treatment or prevents access to the site of occlusion. 
26. Evidence of dissection in the extra or intracranial cerebral arteries. 
27. Occlusions in multiple vascular territories (e.g., bilateral anterior 
circulation, or anterior/posterior circulation). 
Duration of Study 
The total duration of the study is expected to be eighteen months for 
subject recruitment and 3 months for final subject follow-up. 
 
 

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Duration of Subject 
Participation 
Subjects will be on study for up to 90 (±14) days. 
Neurological assessment: 168 hours (± 12 hours) /7 days or discharge 
(whichever occurs first) 
Last Follow-up: 90 (±14) days 
Primary Efficacy 
Endpoint 
The primary efficacy endpoint of the study is revascularization measured 
using modified Thrombolysis in Cerebrovascular Infarction (mTICI inclusive 
of the 2c rating). Successful achievement of the endpoint is defined as 
achieving an mTICI score of 2b or greater in the target vessel following 3 or 
less passes of the EmboTrap device. 
Primary Safety 
endpoint 
The primary safety endpoint will be measured as the occurrence of 
Symptomatic Intracerebral hemorrhage (sICH) within 24 hours (-8/+12 hrs) 
post-procedure, together with any other Serious Adverse Device Effects 
(excluding those already counted in sICH). 
Secondary 
Endpoints 
• 
Good clinical outcome – judged to be an mRS score of ≤2 at 90(+/-14) 
days. 
• 
Time to treat – defined as the time from groin puncture to visualization 
of the final angiographic result. 
• 
All procedure-related mortality at day 7 post-procedure and all-cause 
mortality at 90(+/-7) days post-procedure. 
• 
Serious Adverse Device Effect (SADE). 
• 
Procedure Related Serious Adverse Events (PRSAE). 
• 
Symptomatic ICH (sICH). 
• 
Neurological deterioration – defined by an increase of 4 points or more 
on the NIHSS score, at the 24-hour time point. 
• 
Evidence of Infarction of a previously uninvolved vascular territory, as 
evaluated from 24-hour imaging (CT/MRI). 
Statistics 
The primary efficacy endpoint of the study will be tested using a non- 
inferiority hypothesis for successful revascularization with the EmboTrap 
against a composite Performance Goal derived from a Bayesian meta- 
analysis of adjudicated trial data for similar devices. 
All mTICI outcomes and their proportions will be reported. 
The primary safety endpoint and the secondary endpoints will not be tested 
but will be examined using confidence intervals to calculate the relevant 
population parameter. 
The primary safety endpoint will be the rate of sICH together with SADEs 
(excluding those already counted in sICH). 
 
 

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Secondary endpoints that will be reported using descriptive statistics 
include: 
• 
Clinical outcome at 90 days 
• 
Time to treat 
• 
Mortality post-procedure – All procedure-related mortality 
• 
Serious Adverse Device Effect (SADE) 
• 
Procedure Related Serious Adverse Events (PRSAE) 
• 
Symptomatic ICH (sICH) 
• 
Neurological deterioration 
• 
Evidence of Infarction in a previously uninvolved territory 
 
The study will also perform subgroup analyses on the cohort based 
on: 
• 
Specific vascular location of the occlusion (i.e. intracranial ICA, 
carotid T/L, proximal M1/ distal M1 /M2, VA, BA etc.) 
• 
Technique of treatment as described below: 
− 
Use of a balloon guide vs. no balloon guide 
− 
Use of an intermediate catheter vs. no intermediate catheter. 
 
 

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Table of Contents 
 
1 
Introduction ......................................................................................................... 15 
1.1 
Background ............................................................................................................. 15 
1.1.1 
Intra-arterial thrombolytics ...................................................................................... 15 
1.1.2 
Bridging therapy ........................................................................................................ 15 
1.1.3 
Ethical considerations - Europe ................................................................................ 16 
1.1.4 
Ethical considerations – United States ..................................................................... 16 
1.1.5 
Ethical considerations - all territories ....................................................................... 16 
2 
Investigational device description ......................................................................... 16 
3 
Study objective ..................................................................................................... 18 
3.1 
Primary endpoint ..................................................................................................... 18 
3.2 
Secondary Endpoints ............................................................................................... 18 
3.3 
Rescue Therapy ....................................................................................................... 19 
4 
Study justification and rationale ........................................................................... 19 
4.1 
Measurement scales ................................................................................................ 20 
4.2 
Risk / Benefit analysis .............................................................................................. 20 
5 
Subject selections ................................................................................................. 21 
5.1 
Enrolment ............................................................................................................... 21 
5.2 
Informed consent .................................................................................................... 21 
5.3 
Subject withdrawals ................................................................................................ 22 
5.4 
Subjects lost to follow-up......................................................................................... 23 
6 
Study Design ......................................................................................................... 24 
6.1 
Site Selection ........................................................................................................... 24 
6.2 
Inclusion criteria ...................................................................................................... 25 
6.3 
Exclusion criteria ..................................................................................................... 26 
6.4 
Roll-in phase ............................................................................................................ 27 
6.4.2  
OUS Sites ................................................................................................................... 27 
6.5 
Study Procedures ..................................................................................................... 27 
6.5.1 
Study Flow ................................................................................................................. 27 
6.5.2 
Preparation & Delivery .............................................................................................. 31 
6.5.3 
Positioning and Deployment ..................................................................................... 31 
6.5.4 
Retrieval .................................................................................................................... 32 
6.5.5 
Cleaning and Re-use .................................................................................................. 32 
6.5.6 
24 Hour (-8/+12 hrs) Follow-up ................................................................................ 33 
6.5.7 
72Hour (±12 hrs) Follow-up of angiographic screening failures ............................... 33 
6.5.8 
7 Day/ 168 Hour (±12 hrs) Follow-up ........................................................................ 33 
6.5.9 
90 Day (±14 Days) Follow-up .................................................................................... 33 
6.5.10 
Imaging Core Laboratory........................................................................................... 35 
6.6 
Subjects................................................................................................................... 35 
6.6.1 
Use of OUS data ........................................................................................................ 35 

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6.6.2 
Clinical Practice ......................................................................................................... 35 
7 
Assessment of safety ............................................................................................ 36 
7.1 
Cerebral CT or MR Imaging ...................................................................................... 36 
7.2 
Neurologic Evaluations ........................................................................................... 37 
8 
Statistical analysis ................................................................................................ 37 
8.1 
Study Design ........................................................................................................... 37 
8.2 
Sample Size Considerations ..................................................................................... 38 
8.2.1     Missing and Censored Data .......................................................................................... 38 
8.3 
Analysis Methods .................................................................................................... 38 
8.3.1 
Primary Endpoint ...................................................................................................... 38 
8.3.2 
Intention to Treat ...................................................................................................... 38 
8.3.3 
Analysis of the Secondary endpoints ........................................................................ 39 
8.3.4 
Analysis of Ability to Pool Data Across Investigational Sites ..................................... 40 
8.3.5 
Deviations from the statistical plan .......................................................................... 40 
9 
Amendment to the CIP ......................................................................................... 40 
10 Deviations from the CIP ........................................................................................ 41 
10.1 
Protocol violation ................................................................................................... 41 
10.2 
Protocol deviation .................................................................................................. 41 
11 Device Accountability ........................................................................................... 42 
11.1 
Europe .................................................................................................................... 42 
11.2 
United States .......................................................................................................... 42 
12 Safety and adverse events .................................................................................... 42 
12.1 
Clinical Events Committee (CEC) .............................................................................. 44 
12.2 
Data and Safety Monitoring Board (DSMB) ............................................................... 45 
12.3 
Event notification .................................................................................................... 45 
12.3.1 
Adverse Events (AE) and Adverse Device Effects (ADE) ............................................ 45 
12.3.2 
Serious Adverse Events (SAE) and Serious Adverse Device Effects (SADE) ............... 46 
12.3.3 
Device failure, malfunction, misuse and near incidents ........................................... 46 
13 Site Initiation ........................................................................................................ 47 
13.1 
Training ................................................................................................................... 47 
14 Study monitoring .................................................................................................. 48 
15 Data collection ..................................................................................................... 48 
15.1 
Data Management Responsibilities .......................................................................... 48 
15.2 
Confidentiality ......................................................................................................... 49 
15.3 
Electronic Case Report Forms ................................................................................... 49 
15.4 
Source Documentation ............................................................................................ 49 
15.5 
Data record keeping ................................................................................................ 49 
16 Audits/Inspections ............................................................................................... 49 
17 Criteria for Terminating Study ............................................................................... 49 

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18 Criteria for Terminating a Study Center ................................................................. 50 
19 Study Finances ...................................................................................................... 50 
20 Study Management .............................................................................................. 50 
21 Clinical trial insurance ........................................................................................... 51 
22 Publications Plan .................................................................................................. 52 
Appendix A - DECLARATION OF HELSINKI ..................................................................... 54 
A. 
INTRODUCTION ....................................................................................................... 54 
B. 
PRINCIPLES FOR ALL MEDICAL RESEARCH ................................................................. 55 
C. 
ADDITIONAL PRINCIPLES FOR MEDICAL RESEARCH COMBINED WITH MEDICAL CARE . 58 
Appendix B - Terms and definitions ............................................................................. 59 
 
 
 

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1 Introduction 
 
The large vessels of the brain include the Internal Carotid Artery (ICA), Middle Cerebral Artery 
(MCA), Vertebral Artery (VA), and the Basilar Artery (BA). Occlusion of these large arteries in 
ischemic stroke is associated with significant disability and mortality. Revascularization of 
intracranial artery occlusions is the therapeutic goal in stroke therapy. 
Endovascular mechanical revascularization (thrombectomy) is an increasingly used method for 
intracranial large vessel recanalization in acute stroke. Currently, a number of mechanical 
recanalization devices are in clinical use. First generation devices included the Merci Retriever 
device. Newer devices based on stent-like technology, referred to as “stentrievers” or “stent- 
retrievers”, are currently displacing these first generation thrombectomy devices for 
recanalization in acute ischemic stroke. 
The EmboTrap® Revascularization Device (hereafter referred to as the EmboTrap device) has been 
developed and CE approved for this indication in Europe. The EmboTrap device is approved for 
use in the US strictly within the confines of the ARISE II IDE Study. It is indicated for use in the 
anterior and posterior neurovasculature in vessels such as the internal carotid artery, the M1 and 
M2 segments of the middle cerebral artery, the vertebral artery, and the basilar artery. 
 
1.1 Background 
1.1.1 
Intra-arterial thrombolytics 
Currently, IV lytics are used in Europe and the United States for patients presenting up to 4.5 
hours after symptom onset. Although in the US they are only FDA approved for use in patients 
presenting up to 3 hours after symptom onset, US national clinical practice guidelines [1] 
recommend administering IV lytics in the 3-4.5h window to those patients who meet the ECASS 3 
trial inclusion/exclusion criteria [2]. 
In addition to time constraints, IV thrombolytic therapy has been demonstrated to be less 
effective in recanalizing proximal occlusions of large vessels, such as the ICA and MCA. Since a 
large percentage of strokes presenting at hospitals are large vessel occlusions, this is an important 
clinical challenge to address. Additionally, not all patients may be treated with thrombolytic 
therapy, and so mechanical thrombectomy is a valuable alternative in patients contraindicated to 
t-PA or where t-PA treatment was not effective. 
1.1.2 
Bridging therapy 
Acute stroke treatment protocols vary by hospital center. Often, CT is used to exclude 
hemorrhagic stroke, and CTA (CT Angiography) is used to confirm Large-Vessel Occlusion. 
Additional imaging assessment, such as use of MRI and/or CT Perfusion, varies by center. Since 
the recent presentations of clinical results from the MR. CLEAN, ESCAPE, SWIFT PRIME and 
Extend-IA studies, centers have adopted a bridging approach to treatment – immediately starting 
an IV dose of lytics, then transferring the patient to the angiography suite of a comprehensive 
 
 

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stroke center as quickly as possible to speed the time to intra-arterial intervention, if needed. 
Bridging therapy should occur as determined appropriate by the physician and local practice 
guidance. 
1.1.3 
Ethical considerations - Europe 
The EmboTrap device is a CE-marked, approved device. It will only be used at the physician’s 
discretion and for its indicated use in line with the instructions for use. The collection and analysis 
of the data requires ethical approval; however, the use of the EmboTrap device under this trial 
protocol in Europe does not introduce any new ethical concerns beyond those present when 
treating any acute stroke patient with an approved mechanical thrombectomy device. 
1.1.4 
Ethical considerations – United States 
The EmboTrap device is not FDA cleared in the US. It is an investigational device that may be used 
in the U.S. within the confines of the ARISE II IDE Study. The purpose of this study is to gather 
information on device performance to support an application for clearance to FDA. 
1.1.5 
Ethical considerations - all territories 
The intent of the ARISE II Study is to collect data on subjects in a prospective manner; all patients 
who meet all Inclusion/Exclusion criteria will be included in the analysis. Coded patient data in the 
form of angiographic and CT and/or MRI images, and completed case report forms are required 
in order to assess the study endpoints. Informed consent will be sought from the subject or their 
legal representative for participation and to give permission for the sponsor and subcontractors 
(CRO, CEC, DSMB, and Adjudicating core lab) to have access to these data. 
Physicians should follow local practice guidance’s, their own routine best practice, and the 
EmboTrap device instructions for use when participating in the study. 
 
 
2 Investigational device description 
 
The EmboTrap range intends to restore blood flow in the neurovasculature by removing 
thrombus in patients experiencing ischemic stroke within 8 hours of symptom onset. The product 
descriptions “EmboTrap Revascularization Device” and the “EmboTrap II Revascularization 
Device” are both referred to as “EmboTrap” throughout this protocol for readability. The product 
description “EmboTrap II” was introduced to mark the addition of proximal markers to the 
EmboTrap and the availability of a choice of two working lengths of the EmboTrap device.  
The device is designed for use in the anterior and posterior neurovasculature in vessels such as the 
internal carotid artery, the M1 and M2 segments of the middle cerebral artery, the vertebral 
artery, and the basilar arteries. It is intended for use by physicians trained in neuro- 
interventional catheterization and the treatment of ischemic stroke, and is delivered 
endovascularly under fluoroscopic guidance in a similar manner to that of other neurovascular 
clot-retrieval systems. Once across the site of vessel occlusion, the stent-like element of the 
device is deployed to entrap the clot and allow it to be retrieved, hence restoring blood flow. 
 
 

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The device is available in two lengths, 5u21 mm and 5u33 mm. Both sizes have the same outside 
diameter, size differences relate to the length of the stent-like portion. The device comprises a 
three-dimensional Nitinol retrievable stent-like assembly mounted on the distal end of a 
tapered (guidewire-like), PTFE-coated Nitinol shaft, as shown in Figure 1. 
 
 
 
Figure 1: The EmboTrap device  
 
The EmboTrap device is supplied preloaded within an insertion tool – a transparent, PTFE tube 
incorporating a spiral band of blue color (Figure 2). In use, the physician inserts the insertion tool 
into the hub of a pre-positioned microcatheter and advances the EmboTrap device forward out 
of the insertion tool and into the microcatheter. The spiral blue band of color makes the tool easy 
to find if needed to re-load the device for an additional pass. 
 
Insertion Tool 
 
 
 
Figure 2: An illustration of the Insertion Tool used for loading the EmboTrap device. 
 
Two silver-colored indicator bands (Figure 1) on the proximal portion of the device shaft (i.e. two 
sections of the Nitinol shaft which are not coated with PTFE), represent an important feature of 
the device design as they provide a visual and tactile reference point to the physician that the 
stent-like portion of the device is nearing the end of the microcatheter, thereby helping to avoid 
unintentional advancement of the device from the end of the microcatheter during delivery. For 
example, using a standard microcatheter (total length of 155cm and a 7cm Rotating Hemostasis 
Valve (RHV)), the EmboTrap device tip will be approximately 8cm from the distal end of the 
microcatheter when the first silver band on the EmboTrap shaft approaches the RHV. When 
the second silver band on the EmboTrap shaft approaches the RHV, the device tip will be nearing 
the distal end of the microcatheter. A further benefit of this feature is that it allows the physician 
to minimize the exposure of the patient to X-rays, as he/she can avoid using fluoroscopic guidance 
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3 Study objective 
 
The study objective is to examine the recanalization efficacy of the EmboTrap device and its 
associated performance characteristics and to record associated clinical outcomes in a manner 
that facilitates relevant comparison of outputs with that of devices approved in the U.S. for 
clearing Large Vessel Occlusions. 
 
3.1 Primary endpoint 
The primary efficacy endpoint of the study is revascularization measured using modified 
Thrombolysis in Cerebrovascular Infarction (mTICI inclusive of the 2c rating). Successful 
achievement of the endpoint is defined as achieving a mTICI score of 2b or greater in the target 
vessel, following 3 or less passes of the EmboTrap device. 
The primary safety endpoint will be measured as the occurrence of Symptomatic Intracerebral 
hemorrhage (sICH) within 24 hours (-8/+12 hrs) post-procedure, together with any other Serious 
Adverse Device Effects (excluding those already counted in sICH). 
 
3.2 Secondary Endpoints 
Clinical outcome at 90 days – A good clinical outcome will be judged to be an mRS score of ≤2 at 
90(+/-14) days. 
Procedure Time is defined as the time from groin puncture to achievement of ≥mTICI II b, or if 
not achieved, final angiogram. 
Time to treat is defined as the time from angiographic visualization of large vessel occlusion to 
achievement of ≥mTICI II b or if not achieved, final angiogram. The number of passes to get to 
mTICI 2b or greater flow will also be recorded. 
Mortality post-procedure – All procedure-related mortality (i.e. directly traceable to a procedure- 
related SAE) at Day 7 post-procedure and all-cause mortality at 90(+/-7) days post-procedure. 
Serious Adverse Device Effect (SADE) is where the EmboTrap device caused, or cannot be ruled 
out as having caused, an effect that has resulted in any of the consequences characteristic of a 
serious adverse event. 
Procedure Related Serious Adverse Events (PRSAE) is where the interventional procedure 
caused, or can not be ruled out as having caused, an effect that has resulted in any of the 
consequences characteristic of a serious adverse event. 
Symptomatic ICH (sICH) is any extravascular blood in the brain or within the cranium associated 
with clinical deterioration, as defined by an increase of 4 points or more in the score on the NIHSS, 
or that leads to death and is identified as the predominant cause of the neurologic deterioration 
[3]. For the purpose of data analysis, subjects with sICH identified through all post–treatment 
scans up to the 24 hour timepoint (including those performed due to clinical deterioration), will 
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Neurological deterioration – defined by an increase of 4 points or more on the NIHSS score, at 
the 24-hour time point. 
Evidence of Infarction – Infarction of a previously uninvolved vascular territory, as evaluated from 
24-hour imaging (Computed Tomography (CT)/Magnetic Resonance Imaging (MRI)) by the 
Angiography Core Lab. 
 
3.3 Rescue Therapy 
After the primary endpoint angiogram is taken, if revascularization is inadequate (i.e. less than 
mTICI 2b), rescue therapy is permitted. 
Use of rescue therapy, prior to taking the primary endpoint angiogram, is a protocol violation and 
the resultant angiogram outcomes will be considered failures to achieve the primary endpoint 
irrespective of mTICI score. 
 
Use of any of the following, to treat the patient, is considered rescue therapy: 
 
• 
Use of another mechanical thrombectomy device. 
• 
Use of mechanical pump aspiration (e.g. Penumbra Pump) during the procedure. 
• 
Initiation of IA-tPA. 
• 
Use of intra cranial stenting during the procedure. 
 
Secondary endpoints measured after use of rescue therapy at any time will be censored from 
the data and where appropriate multiple imputation will be used to ensure sufficient data (i.e. 
equivalent to that which would be obtained from a sample size of 176 are available for 
calculation of the secondary endpoints). Further details are contained in section 8. 
 
 
4 Study justification and rationale 
 
The purpose of this study is to assess whether the EmboTrap device, used under routine clinical 
conditions within 8 hours of onset of acute ischemic stroke, is at least as effective as similar devices, 
and for this purpose specifically evaluate the success of vessel. 
Research in cases of acute stroke is challenging as the potential study cohort is very restricted. 
Hence efficient study design is very import. 
The study will use core laboratory adjudication to examine the recanalization efficacy of the 
EmboTrap device in a manner that facilitates relevant comparison of efficacy with a meta-analysis 
derived composite Performance Goal endpoint based on devices cleared by FDA in the U.S. for 
unblocking Large Vessel Occlusions. The availability of published core laboratory adjudicated data 
for a similar population provides an appropriate historical basis to test the hypothesis. Hence, using 
a single arm study makes efficient use of the available cohort size. 
 

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Additionally, descriptive statistical reporting of the secondary outcomes will allow side-by-side 
comparison of the secondary endpoints with that of comparable stent-retrievers from the SWIFT 
and TREVO II studies. Hence, the safety and efficacy of the EmboTrap device relative to other 
devices on the US market may be characterized. 
 
4.1 Measurement scales 
The following measurement scales will be used in the ARISE II clinical study: 
mTICI – modified thrombolysis in cerebral infarction (TICI) score. The primary study outcome, 
revascularization, will be measured by an independent adjudicating core laboratory and reported 
using the mTICI (inclusive of the 2C rating) scale. 
TIMI - 'TIMI Grade Flow' is a scoring system from 0-3 referring to levels of blood flow (For 
comparison of information the core laboratory will also provide adjudication on each image using 
the TIMI scales) 
NIHSS Score - The National Institutes of Health Stroke Scale, or NIH Stroke Scale (NIHSS) is a tool 
used by healthcare providers to objectively quantify the impairment caused by a stroke. The NIHSS 
is composed of 11 items, each of which scores a specific ability between a 0 and 4. For each item, 
a score of 0 typically indicates normal function in that specific ability, while a higher score is 
indicative of some level of impairment. The individual scores from each item are summed in order 
to calculate a patient's total NIHSS score. The maximum possible score is 42, with the minimum 
score being a 0. 
mRS – The modified Rankin Scale (mRS) is a commonly used scale for measuring the degree of 
disability or dependence in the daily activities of people who have suffered a stroke or other causes 
of neurological disability. 
 
4.2 Risk / Benefit analysis 
While mechanical thrombectomy may speed time to reperfusion, like all therapies it carries risks. 
Through the EmboTrap device risk assessment process, a multi-functional team identified risks 
associated with the design, processing and use of the device, and identified the characteristics 
related to its safety. 
All clinical risks were considered, including those identified through the Risk Management Report, 
and through the clinical literature search process. The risks listed below represent those identified 
as most clinically relevant through the literature review process. 
• 
Abrupt vessel closure. 
• 
Access complications. 
• 
Access site pain, hematoma or hemorrhage. 
• 
Allergic reaction to anticoagulants or antiplatelet therapy, contrast medium, or device 
material. 
• 
Aneurysm or pseudo aneurysm. 
 
 

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• 
Arrhythmias, including VF and VT. 
• 
Clot fragmentation during retrieval. 
• 
Death. 
• 
Delayed Recanalization. 
• 
Device detachment. 
• 
Emboli, distal (air, tissue or thrombotic emboli). 
• 
Embolization of a previously unaffected vessel. 
• 
Hemorrhagic Transformation. 
• 
Hypotension/hypertension. 
• 
Infection, local and/or systemic. 
• 
Peripheral ischemia/peripheral nerve injury. 
• 
Pulmonary edema. 
• 
Renal failure. 
• 
Respiratory failure. 
• 
SAH - Subarachnoid Hemorrhage. 
• 
Sedation complications. 
• 
Shock. 
• 
New Stroke/cerebrovascular accident/transient ischemic attack (TIA). 
• 
Thrombus formation in the vessel (proximal, at the site of and distal). 
• 
Total occlusion of cerebral vessel. 
• 
Vasospasm. 
• 
Vessel trauma, dissection, perforation, rupture or injury. 
All efforts will be made to minimize the risks in this study by selecting investigators experienced 
and skilled in this interventional procedure and who have been trained in the ARISE II Study 
investigational protocol. 
 
 
5 Subject selections 
 
5.1 Enrolment 
All consecutive patients who meet the inclusion and exclusion criteria will be enrolled. 
 
5.2 Informed consent 
Prior to admission to the study, a patient informed consent document will be given to each 
prospective subject or their Legally Authorized Representative (as defined by the local IRB or ethics 
committee), including an explanation of the study, duration, explanation of medical record access 
and patient anonymity, and how their coded data may be transferred, used for publications or in 
submissions for reimbursement support. The informed consent form will contain language that is 
non-technical and understandable to the patient or his/her legal representative. 
 

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The treatment occurs in an acute emergency situation, so locally required informed consent 
procedures may apply and will be complied with. 
Each potential subject will be provided with written and verbal information regarding the nature 
of the study in an understandable manner. Adequate time will be allowed for the subject to 
consider participation in the clinical trial. Signed, written consent will be obtained from each 
subject prior to data collection and entry into the study. Any coercion or undue influence of 
potential subjects to participate must be avoided, and the subject’s legal rights should not be 
waived. The investigator or an appropriately designated member of the study staff shall co-sign 
the consent form, indicating they believe the subject has understood the nature and risks of the 
study and, in their estimation, the subject clearly understands the scope of the consent. The 
investigator must inform subjects that they are in a controlled clinical trial, apprise them of their 
rights as set forth in the informed consent document, and make written documentation that such 
a discussion took place. 
If the subject is not able to sign the informed consent, but has given his/her oral consent to 
participate, a third party can sign the informed consent for the subject. The procedure will be 
documented in the medical record. If the subject is not able to give his/her informed consent to 
participate in the study, a legally authorized relative or independent physician can sign the 
informed consent for the subject if this is approved by the local Institutional Review Board (IRB) or 
Ethics Committee (EC). 
Short form informed consent may be utilized if approved by the IRB/EC. Each institution must 
follow their institutional IRB/EC policy for obtaining informed consent. If the short form informed 
consent is used, the summary must include all the basic elements of informed consent (21 CFR 
50.25; ICH E6 4.8.10). 
The procedure around how the informed consent is collected will be recorded in each subjects’ 
medical record. The signed consent forms will be retained by the investigator and made available 
(for review only) to the study monitor and auditor on request. 
Each site will maintain a log of all screened patients detailing the reasons for any subsequent 
patient exclusions or non-participation in the study. This could occur if angiographic inclusion and 
exclusion criteria are not met or if informed consent was withdrawn. 
 
5.3 Subject withdrawals 
Participation in this investigation is voluntary, and the subject may withdraw at any time. All 
enrolled subjects will be included in data analysis, unless they withdraw permission for their data 
to be used. The Sponsor will retain and continue to use any data collected prior to the withdrawal 
of consent, unless specified by the Subject or their Legally Authorized Representative. 
In the event the subject chooses to withdraw, he/she will be instructed to contact the Investigator 
immediately. Withdrawal from the investigation will not affect the subject’s follow-up care. The 
subject will be informed of any significant information regarding new findings that may develop 

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during the course of the research study that may relate to his or her willingness to continue 
participation as a study subject. 
Subjects will participate in their routine follow-up and allow this data to be gathered or their 
participation in the study will be prematurely terminated. If their participation is terminated, any 
of their data which has been already gathered will continue to be included. The completion of a 
subject’s participation in the study or early departure from the study must be fully documented in 
the subject’s study progress notes. 
Subjects will be considered discontinued from the study if any of the following occur: 
• 
Death or intercurrent illness: If, during the conduct of the study, a subject dies or 
experiences an intercurrent illness, all available information should be obtained and an 
appointed Neuravi representative/ study monitor should be notified no more than 24 
hours from study staff becoming aware of the event. 
• 
If a subject’s death occurs while in the hospital, submit a copy of the physician’s death 
summary report. If an autopsy is performed, submit a copy of the autopsy report, as well. 
If a subject’s death occurs outside of the study site, obtain all information related to the 
death and submit the investigator’s summary of the events associated with the death. 
• 
Subject voluntarily withdraws from the study: A subject may withdraw consent from study 
participation at any time. 
• 
Subject withdrawn from the study by the investigator: An investigator may withdraw an 
enrolled subject from the study for the following reason: 
Protocol violation: Should a subject be enrolled but later determined ineligible based on 
previously unavailable source documentation or due to a violation in following the protocol at the 
study site, this subject will be considered a protocol violation. This subject’s data will not be 
pooled for statistical analysis with those subjects confirmed to be eligible by the investigator 
and the appointed study monitor for Neuravi. All protocol violations should be documented by 
the study monitor appointed by Neuravi. 
 
5.4 Subjects lost to follow-up 
If a subject fails to return for the follow-up visit, a letter will be sent to their most current mailing 
address, reminding them of their study obligations. Additionally, the subject will be contacted at 
their last known home telephone number. When all reasonable attempts to locate the subject have 
been exhausted, including contacting the subject’s general practitioner, the subject will be 
considered lost to follow-up. Documentation is required for all attempts to locate the subject. 

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6 Study Design 
 
The study aims to include 176 evaluable patients; however, enrolment of up to 228 patients will 
be allowed in the event the data is needed to compensate for “roll in" patients, missing or censored 
outcome data, patient withdrawal, or too small a mITT population to test the primary endpoint for 
the hypothesis as designed. 
There are three FDA cleared stent retrievers indicated for neuro-thrombectomy: Merci, Trevo and 
Solitaire. The Trevo and Solitaire devices conducted randomized trials using the Merci device as a 
control in support of premarket clearance. The results, of these trials provide a valid scientific basis 
for the establishment of a composite performance goal derived using a Bayesian meta-analysis. At 
176 evaluable patients and 64% successful endpoint achievement the ARISE II study is expected 
to allow the EmboTrap device, with 90% power, to claim non-inferiority based on a one-sided test 
at the 0.025 significance level to U.S. approved predicate devices. 
The success rate in ARISE II for the population of interest will be assessed using an Intention To 
Treat basis and also a modified Intention To Treat analysis. 
Vessel recanalization and revascularization based on the final post-EmboTrap device use 
angiogram is a clearly measurable efficacy endpoint and less susceptible to influencing factors 
based on the patient population and care than other patient related outcomes. 
 
6.1 Site Selection 
The sponsor or a representative of the sponsor will assess each potential site to ensure the 
principal investigator and their staff has the facilities and expertise required for the study. Sites 
will be selected based upon a site assessment considering appropriate facilities, and the 
qualifications of the investigator(s). Individual investigators will be evaluated by the Sponsor 
based on experience with the intended procedure(s), and ability to conduct the study according 
to the study protocol. 
 
Principal investigators and sites will be selected based upon the following factors: 
 
• 
Previous experience with clinical research and mechanical thrombectomy procedures. 
• 
Experience in conducting controlled, clinical studies. 
• 
Willingness to observe confidentiality at all times. 
• 
Currently treating subjects who meet the inclusion/exclusion criteria. 
• 
Ability to enroll an adequate number of subjects. 
• 
Ability to perform required clinical testing, including: angiography, CT, and/or MRI. 
• 
Ability and willingness to provide the sponsor’s representatives, FDA and local regulatory 
authorities access to the hospital records, study files, and subject files as they pertain to 
the study. 
• 
Willingness to participate, including compliance with all aspects of the study. 
 
 

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• 
Adequate staffing to conduct the study. This includes: 
o Principal Investigator (PI): Responsible for overall clinical management of subjects 
enrolled at his/her institution. Assumes overall responsibility and accountability 
for the clinical team and for data obtained from each subject participating in the 
study. Ensures compliance with the protocol, applicable laws, and applicable 
regulations; ensures informed consents are signed, and reviews and signs eCRFs 
indicating documents are accurate and complete. 
o Sub/Co-Investigator(s) (Sub-I/Co-I): Responsible for study activities 
in 
coordination with PI and in accordance to the investigational plan. Assume the 
responsibility of the PI should the PI resign from the study. A site is not required 
to have a co-investigator. 
o Study Coordinator: Assists PI with study activities as delegated by the PI, including 
tracking subjects involved in the study, scheduling testing and follow-up visits, 
maintaining study records, completing eCRFs to the sponsor in a timely manner. 
 
6.2 Inclusion criteria 
Study subjects must meet all of the inclusion criteria listed below: 
1. 
The patient or the patient’s legally authorized representative has signed and dated an 
Informed Consent Form. 
2. 
Aged between 18 years and 85 years (inclusive). 
3. 
A new focal disabling neurologic deficit consistent with acute cerebral ischemia. 
4. 
NIHSS score ≥8 and ≤25. 
5. 
Pre-ictal mRS score of 0 or 1. 
6. 
The interventionalist estimates that at least one deployment of the EmboTrap device 
can be completed within 8 hours from the onset of symptoms. 
7. 
Patients for whom IV-tPA is indicated and who are available for treatment, are treated 
with IV-tPA. 
8. 
IV t-PA, if used, was initiated within 3 hrs of stroke onset (onset time is defined as the 
last time when the patient was witnessed to be at baseline), with investigator 
verification that the subject has received/is receiving the correct IV t-PA dose for the 
estimated weight. 
9. 
Angiographic confirmation of an occlusion of an ICA (including T or L occlusions), M1 or 
M2 MCA, VA, or BA with mTICI flow of 0 – 1. 
10. 
For strokes in the anterior circulation, the following imaging criteria should also be 
met: 
a. MRI criterion: volume of diffusion restriction visually assessed ≤50 mL. 
OR 
b. CT criterion: ASPECTS 6 to 10 on baseline CT or CTA-source images, or, volume 
of significantly lowered CBV ≤50 mL. 
11. The patient is indicated for neurothrombectomy treatment by the Interventionalist and 
it is confirmed by diagnostic angiography that the device will be able to reach the target 
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6.3 Exclusion criteria 
Subjects must NOT meet ANY of the exclusion criteria listed below: 
1. 
Life expectancy likely less than 6 months. 
2. 
Females who are pregnant or breastfeeding. 
3. 
History of severe allergy to contrast medium. 
4. 
Known nickel allergy at time of treatment. 
5. 
Known current use of cocaine at time of treatment. 
6. 
Patient has suffered a stroke in the past 3 months. 
7. 
The patient presents with an NIHSS score <8 or >25 or is physician assessed as being in a 
clinically relevant uninterrupted coma. 
8. 
Subject participating in another study involving an investigational device or drug. 
9. 
Use of warfarin anticoagulation or any Novel Anticoagulant with International 
Normalized Ratio (INR) >3.0. 
10. Platelet count <50,000/μL. 
11. Glucose <50 mg/dL. 
12. Any known hemorrhagic or coagulation deficiency. 
13. Unstable renal failure with serum creatinine >3.0 or Glomerular Filtration Rate (GFR) <30. 
14. Patients who have received a direct thrombin inhibitor within the last 48 hours; must 
have a partial thromboplastin time (PTT) less than 1.5 times the normal to be eligible. 
15. All patients with severe hypertension on presentation (SBP > 220 mmHg 
and/or DBP > 120 mm Hg). All patients, in whom intravenous therapy with 
blood pressure medications is indicated, with hypertension that remains 
severe and sustained despite intravenous antihypertensive therapy (SBP 
>185 mmHg and/ or DBP >110 mmHg). 
16. Known cerebral vasculitis. 
17. Rapidly improving neurological status. 
18. Clinical symptoms suggestive of bilateral stroke or stroke in multiple territories. 
19. Ongoing seizure due to stroke. 
20. Evidence of active systemic infection. 
21. Known cancer with metastases. 
22. Computed tomography (CT) or Magnetic Resonance Imaging (MRI) evidence of recent/ 
fresh hemorrhage on presentation. 
23. Baseline computed tomography (CT) or MRI showing mass effect or intracranial tumor 
(except small meningioma). 
24. Suspicion of aortic dissection, presumed septic embolus, or suspicion of bacterial 
endocarditis. 
25. Stenosis, or any occlusion, in a proximal vessel that requires treatment or prevents access 
to the site of occlusion. 
26. Evidence of dissection in the extra or intracranial cerebral arteries. 
27. Occlusions in multiple vascular territories (e.g., bilateral anterior circulation, or 
anterior/posterior circulation). 
 
 

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6.4 Roll-in phase 
Physicians will be trained in the use of the EmboTrap device before any patient procedures. To 
further assure protocol compliance, participating sites will be required to conduct some “roll-in” 
patients prior to the enrolling patients into the study. The number of roll-ins to be conducted is 
region-specific and takes into account an investigation sites previous experience using the 
EmboTrap device. 
Roll-in patients will be analyzed separately from the patients enrolled in the pivotal study, but the 
information will be recorded and included with the clinical data reported from the study. 
 
6.4.1   US Sites 
 
Participating sites will be required to conduct two roll-in patients with the EmboTrap device prior 
to commencing patient enrolment into the pivotal phase of the study. 
6.4.2  OUS Sites 
As the device is CE marked and currently on the market in Europe, sites who did not participate in 
the earlier ARISE study will be required to conduct one roll-in patient with the EmboTrap device to 
confirm the sites’ ability to upload information to the eCRF appropriately. Sites which have already 
enrolled subjects in the ARISE Study and have successfully uploaded information into the eCRF 
system will automatically move into the pivotal phase of ARISE II without roll-in patients. 
All sites both in the US and OUS will be subject to a monitoring visit with 100% source data 
verification (SDV) as soon as possible after the enrolment of the first patient. Monitoring will focus 
on correct adherence to the protocol and the complete and appropriate data entry.  Continued 
participation in the study depends on satisfactory study compliance. 
 
6.5 Study Procedures 
6.5.1 
Study Flow 
Subjects presenting with acute ischemic stroke will be evaluated by the physician, in accordance 
with their institutional practice, to establish an appropriate treatment plan based on the Subject’s 
medical condition and available diagnostic screening procedures prior to recruitment in the ARISE 
II Study. A representative overview of the study flow is shown in Figure 3. 
 

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Figure 3: Study Flow: Patient is in study from time informed consent is obtained 
 
 

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<HV
Microcatheter placed 
distal to occlusion at 
target site
EmboTrap deployed at 
target site?
Use EmboTrap for 
mechanical 
thrombectomy
Primary Endpoint, obtain 
angiogram, determine 
revascularization
mTICI 2b, mTICI 2c or mTICI 3
mTICI 1 or mTICI 2a
May use rescue therapy to treat the 
target large vessel occlusion:
Mechanical pump
Alternative stent retriever
Intracranial stenting
IA lytics (22mg per institution policy)
Follows local standard of care
Physician completes procedure 
per standard practice 
Final procedure Angiogram 
obtained
Patient transferred to ward
24 hour follow-up
7 day or discharge follow-up
90 day follow-up
Patient finishes study
Note: 
Must allow 3 passes of 
EmboTrap to treat the 
target Large Vessel 
occlusion before the 
introduction of other 
devices for this 
purpose.
Less than 3 
passes of 
EmboTrap 
complete
Resheath EmboTrap 
with microcatheter and 
reposition. Do not 
reposition more than 
twice
1R
 
 
Figure 4: Procedure flow diagram for revascularization with EmboTrap device 
 
 

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6.5.1.1 
Screening 
Subjects will be screened against the study inclusion/exclusion criteria to determine their initial 
eligibility. A member of the research team (hospital/institution personnel assigned to the ARISE II 
Study) should review their eligibility. All subjects screened will be documented on the 
Screening/Enrolment log, including the reason for non-participation for subjects who do not enroll. 
6.5.1.1.1 General Medical Evaluation 
• 
A physical examination and medical history. 
• 
Blood pressure and pulse prior to treatment with the EmboTrap device. 
• 
Concomitant medication at baseline 
 
6.5.1.1.2 Laboratory Evaluation 
Blood and/or urine specimens for the following laboratory studies: 
 
1. Pregnancy test (for female patients with childbearing potential) 
2. Hemoglobin, and platelet count. 
3. Coagulation parameters: activated partial thromboplastin time (aPPT) and international 
normalized ratio. 
4. Kidney function: creatinine or GFR 
5. Serum glucose. 
 
6.5.1.1.3 Neurologic Evaluation 
Screening NIHSS should be recorded as performed. At screening, an historical mRS will be 
obtained from the subject or the subject’s caretaker. 
6.5.1.1.4 Computed tomography or magnetic resonance imaging 
Computed tomography (CT) or magnetic resonance imaging (MRI) obtained prior to study 
enrolment will be used for baseline assessment.  
 
6.5.1.1.5 Procedural angiography 
Angiography obtained during the procedure will consist of a baseline angiogram, post-device use 
angiograms (if applicable), a post-final EmboTrap device use angiogram, and if rescue therapy is 
used, a final post-procedure angiogram. 
Baseline angiogram will be obtained prior to device deployment to assess inclusion exclusion 
criteria as well as to assess clot location. Post-device use angiograms will be obtained immediately 
after completion of each EmboTrap device and/or rescue therapy pass. The primary endpoint 
assessment angiogram will be considered any angiogram achieving a rating of mTICI 2b or greater 
reperfusion, after 3 or less passes of the EmboTrap device, or in the case this is not achieved, the 
third post EmboTrap device use angiogram. The final post-procedure angiogram will be obtained 
after all treatments, including any rescue therapies, have been completed. The final post procedure 
angiogram should comprise a full A-P lateral image. 
CT or MRI will also be obtained at 24 hours (16–36 hours) post-procedure to assess any presence 

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of hemorrhage. It is preferred, but not required, that whether CT or MRI is taken at baseline, to 
make direct comparison easier, the same imaging modality is obtained at follow-up. 
 
6.5.1.2 
Adverse Events 
Record any adverse events which occur during the procedure. 
The procedure description follows. 
6.5.2 
Preparation & Delivery 
• 
Using standard interventional techniques access the arterial system and using angiography, 
determine the location of the occluded vessel. 
• 
Advance an appropriate Guide Catheter, Sheath or Balloon Guide Catheter as close to the 
occlusion as possible. Connect a rotating hemostasis valve (RHV) to the proximal end of 
this catheter and connect to a continuous flush system. 
• 
Select an appropriate Microcatheter. Connect an RHV to the proximal end of the 
Microcatheter and connect to a continuous flush system. 
• 
With the aid of a suitable guidewire, and using standard catheterization techniques and 
fluoroscopic guidance, advance the Microcatheter up to and across the occlusion so that 
the distal end of the Microcatheter is positioned distal of the occlusion. 
• 
Remove the guidewire from the Microcatheter and, if desired, gently infuse contrast media 
through the Microcatheter to visualize the distal end of the occlusion. 
• 
Remove the Insertion Tool with the preloaded Device from the packaging hoop, taking care 
not to accidentally retract or advance the Device from the Insertion Tool while doing so. 
• 
Insert the distal end of the Insertion Tool through the RHV of the Microcatheter and wait 
until fluid is seen exiting the proximal end of the Insertion Tool, confirming that the Device 
is flushed. Advance the Insertion Tool until it contacts the hub of the Microcatheter. Fully 
tighten the RHV to hold the Insertion Tool securely in position. 
• 
Confirm that the Insertion Tool is fully seated in the hub of the RHV before proceeding to 
advance the Device. Advance the Device until at least half of the shaft length has been 
inserted into the Microcatheter, at which point the Insertion Tool may be removed. 
6.5.3 
Positioning and Deployment 
• 
Continue to advance the Device until the distal radiopaque tip of the Device aligns with the 
distal tip of the Microcatheter. 
Note: There are two silver bands positioned on the proximaI portion of the Device shaft to assist 
in minimizing the amount of fluoroscopic exposure required during Device insertion. If 
using a standard Microcatheter (total length of 155cm and a 7cm RHV), then when the first 
silver band on the shaft approaches the RHV, the Device tip will be approximately 8cm 
from the distal end of the Microcatheter. When the second silver band on the Device 
shaft approaches the RHV the Device tip will be nearing the distal end of the Microcatheter. 

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• 
Advance the Device in the Microcatheter and position the EmboTrap within the clot as 
described in the Instructions for Use. 
• 
While stabilizing the Device shaft, retract the microcatheter to deploy the Stent-like 
assembly within the clot. The EmboTrap will be fully deployed once the distal tip of the 
microcatheter has been retracted to a position over the proximal radiopaque coil of the 
Device. 
• 
The EmboTrap should be left to embed within the clot for 3-5 minutes prior to withdrawal. 
 
6.5.4 
Retrieval 
Note: The use of a Mechanical Pump for aspiration is not allowed per protocol. 
• 
Optimum control of the Device and microcatheter relative positions during retrieval may 
be achieved by advancing a torque device over the Device shaft and tightening it against 
the microcatheter RHV. 
• 
If using a Balloon Guide Catheter inflate the balloon to occlude the vessel as per the 
Balloon Guide Catheter IFU. 
• 
Withdraw the Device and Microcatheter slowly and carefully as a unit to the Guide Catheter 
tip while aspirating through the Guide Catheter with a syringe. 
• 
As the device reaches the Guide Catheter, apply vigorous aspiration (by syringe), withdraw 
the Device and microcatheter into the Guide Catheter and continue to aspirate until the 
Device reaches the proximal RHV. 
Note: If withdrawal into the Guide Catheter is difficult (as may be the case with a large clot 
burden) then deflate the balloon (if applicable) and withdraw the guide, Microcatheter and 
Device together through the Introducer Sheath. 
• 
Disconnect the RHV from the Guide Catheter and remove the Device, Microcatheter and 
RHV together from the Guide Catheter. 
• 
Use the syringe to further aspirate the Guide Catheter to ensure it is clear of any thrombus 
material. 
6.5.5 
Cleaning and Re-use 
• 
Each EmboTrap Revascularization Device may be used for up to three (3) retrieval attempts. 
• 
If an additional pass is to be made with the Device then carefully remove any captured 
thrombus from the Device and clean the Device in heparinized saline, rubbing gently from 
proximal to distal to remove any residual thrombus material. Inspect the Device carefully 
and if any damage or deformity is observed do not use the Device – instead use a new 
EmboTrap Revascularization Device for any subsequent passes. If using the same Device, 
replace the Insertion Tool onto the proximal shaft and retract the Device into the Insertion 
Tool until it is fully resheathed. 
Do not attempt more than three (3) retrieval attempts in the same vessel. 
 
 
 

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6.5.6 
24 Hour (-8/+12 hrs) Follow-up 
The 24(-8/+12) hour follow-up visit includes: 
• 
An NIHSS examination 
• 
CT or MRI imaging. 
 
• 
Record any adverse events which occur after the procedure and up to the time of the 24 
hour examination. 
 
6.5.7 
72Hour (±12 hrs) Follow-up of angiographic screening failures 
For patients who were consented but not included due to failure to meet angiographic inclusion 
or exclusion criteria; record any adverse events which occur up to the time of the 72 (±12) hour 
examination. 
 
6.5.8 
7 Day/ 168 Hour (±12 hrs) Follow-up 
The 7 Day/ 168 Hour (±12 hrs) follow-up visit includes: 
• 
An NIHSS examination 
• 
Physical Examination 
• 
Concomitant medications 
• 
Record any adverse events which occur after the 72 hour time point and up to the time of 
the 168 hour examination. 
6.5.9 
90 Day (±14 Days) Follow-up 
The 90 Day (±14 Days) follow-up visit includes: 
• 
An NIHSS examination and an mRS 
• 
Record any adverse events which occur after the 168 hour time point and up to the time 
of the 90 day examination. 
 
Subjects who successfully complete the 90 day visit will be discharged from the study. 
 
 
 

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Table 1: Study visits and assessments 
 
Study Requirement 
Screening 
Procedure 
Post Procedure 
Within 8 
hrs. of 
onset of 
stroke 
Time Ø 
24 Hours 
(-8/+12 hrs) 
72 Hours 
(± 12 hrs) 
7 Day 
168 Hours (± 12 
hrs) or at 
Discharge 
90 Days 
(± 14 
days) 
Informed consent 
X(1) 
Pregnancy test 
X(2) 
NIHSS Score 
X(5) 
X 
X(3) 
X 
Modified Rankin Scale (mRS) 
X 
X 
Medical history 
X 
Physical examination 
X 
X(3) 
Blood Pressure and Pulse 
X 
Assess/confirm study 
eligibility 
X 
CT or MRI 
X 
X 
Angiography 
X(6) 
X(7) 
Hemoglobin and Platelet 
Count 
X 
Serum Glucose 
X 
Serum Creatinine or GFR 
X 
International normalized 
ratio 
(INR), activated partial 
thromboplastin time 
(APTT) 
X 
Mechanical thrombectomy 
procedure (EmboTrap as well 
as any rescue devices) 
X 
Concomitant medications 
X 
X(3) 
Record adverse events 
X(4) 
X 
X 
X(8) 
X(3) 
X 
(1) 
Patient or Legally Authorized Representative must sign informed consent prior to screening specific tests 
which are beyond the local standard of care. 
(2) 
For females of childbearing potential, subjects must have a documented negative pregnancy test prior to 
device insertion except in the case of local regulations and ethic committee approvals requiring consent 
post the emergency situation. 
(3) 
To be performed at 168 Hours (+/- 12 hrs) or at discharge (whichever occurs first). 
(4) 
Record all adverse events from the time of signature of the ICF. 
(5) 
Perform prior to angiography. 
(6) 
Perform just prior to mechanical thrombectomy in order to verify the angiographic inclusion/exclusion criteria 
are met. 
(7) 
Perform angiography after every EmboTrap device pass, at the final EmboTrap device use, after each rescue 
therapy device pass. Obtain a final angiogram at the end of the interventional procedure. 
(8) 
Follow up at 72 hours is exclusively for adverse events in the consented but not included patients where they 
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6.5.10 Imaging Core Laboratory 
The objective of the Imaging Core Lab is to provide an unbiased assessment of the rate of 
revascularization defined by mTICI scores based on angiographic imaging from the study sites. The 
Core Lab will review all angiograms obtained. Data provided by the Core Lab will serve as the ‘gold 
standard’ and will be used for data analysis and determination of device efficacy. Each angiogram 
will be read independently by two experienced Core Lab neurointerventionalists. Any 
discrepancies in mTICI scoring will be resolved by a third, independent reader. 
The Core Lab will also have the responsibility to evaluate CT/MRI examinations to detect and assess 
hemorrhages. Hemorrhages will be radiologically classified as described in section 7.1. 
 
6.6 Subjects 
WHO estimates that of the 15M annual strokes world-wide, one-third of patients die and one-third 
are disabled. Two of the primary factors associated with mortality in these patients are the 
occlusion location and the time to treatment. Per Smith et al [12], large-vessel occlusions, present 
in 46% of unselected acute stroke patients presenting in academic medical centers, are associated 
with higher stroke severity. These more proximal vessels feed a large volume of brain tissue, ergo 
clinicians use the presenting NIHSS score as an indicator of large-vessel occlusion. 
 
6.6.1 
Use of OUS data 
The clinical practice for treatment of acute ischemic stroke is very similar in Europe to that in the 
U.S., endovascular device handling and use is identical and these are the factors that most affect 
revascularization outcome. 
 
6.6.2 
Clinical Practice 
The use of MRI for screening is more common in the US than in Europe. Either method is 
appropriate. Actual endovascular treatment in both the US and Europe occurs in a catheterization 
laboratory. Between the continents cath lab practices and procedures do not differ in a manner 
that could affect revascularization outcome measured angiographically at a centralized core 
laboratory. 
In both the US and Europe, patients experiencing an acute ischemic stroke receive lytic IV-tPA (if 
they are suitable candidates); if this is not effective then they are treated endovascularly with a 
stentriever. In the US, and in some European sites, the interventionalist waits sixty minutes to see 
if the lytics achieve revascularization before using the stent retriever. Although there is a potential 
here for a difference in the duration of exposure to lytic therapy before stentriever treatment, it is 
expected that very few ARISE II patients will be treated within an hour of receiving lytic therapy. 
While in both the United States and Europe lytic therapy is recommended for patients meeting the 
ECASS inclusion/exclusion criteria between the 3-4.5 hour TFSO, lytics are not FDA approved for 
use in this time window. Local practice follows the guidances. 
There are no other population or location specific treatment differences present between the 
 
 

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patients treatment in the US and that in Europe which could reasonably be suggested to influence 
revascularization results. 
 
 
7 Assessment of safety 
 
The following assessment criteria will be used to evaluate the safety endpoint of the study. 
 
7.1 Cerebral CT or MR Imaging 
This study will collect imaging data in line with routine practice as follows: 
• 
Pre-procedure CT/ MR imaging 
• 
Pre-treatment angiogram, post-device placement angiogram (if this was performed) & 
post-procedure angiogram 
• 
24(-8/+12) hour CT/ MR imaging 
 
All imaging should be in line with standard of care. No extra imaging should be performed for the 
purpose of the study. No patient should be exposed to extra radiation as a result of participation. 
Any other imaging performed (for example as a result of clinical deterioration) will also be 
provided. 
In the event of abrupt neurologic deterioration or when deemed necessary by the investigator, an 
emergency CT or an MR imaging evaluation should be performed. An immediate evaluation of the 
presence/absence of hemorrhage, edema, and/or infarction as contributors to the clinical 
deterioration will be made. Any imaging taken prior to the routine 24hr imaging (which may be 
taken in a time window of 16-36 hours without becoming a protocol deviation) for this reason will 
be included in the analysis. 
Cerebral hemorrhage is categorized as hemorrhagic infarct or parenchymal hematoma by the 
following definitions: 
• 
Hemorrhagic infarct is any area of petechial or small, confluent hemorrhages within larger 
regions of hypodense, ischemic injury without mass effect. 
• 
A parenchymal hematoma is a more homogenous area of hemorrhage, with or without 
intraventricular extension, usually with mass effect. 
Hemorrhages will be classified clinically and radiologically according to the following categories [4]: 
Clinical categories: 
• 
C1: Clinical deterioration where hemorrhage is the primary cause< 4 NIHSS points 
• 
C2: Clinical deterioration where hemorrhage is the primary cause ≥ 4 NIHSS points 
 
 

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Radiological categories: 
• 
HI 1: small petechiae within the ischemic field without mass effect 
• 
HI 2: confluent petechiae within the ischemic field without mass effect 
• 
PH 1: Hematoma within ischemic field with mild space occupying effect but involving 
≤30% of the infarcted area 
• 
PH 2: Hematoma within ischemic field with space occupying effect involving >30% 
of the infarcted area 
• 
RIH: Any intraparenchymal hemorrhage remote from the ischemic field 
• 
IVH: Intraventricular hemorrhage 
• 
SAH: Subarachnoid hemorrhage 
• 
SDH:  Sub Dural Hematoma 
• 
EDH: Extra Dural Hematoma 
 
7.2 Neurologic Evaluations 
Repeat NIHSS determinations are performed in line with standard of care at 24 hours (-8/+12 hrs) 
and at 7 days (or discharge whichever is sooner) time points post-procedure. An additional NIHSS 
score should be obtained when any signs of neurologic deterioration occur or in the event of an 
ICH to assess the degree of deterioration. A certified examiner should perform all neurologic 
evaluations. The 90-day evaluation will record the mRS score. 
 
 
8 Statistical analysis 
 
8.1 Study Design 
The objective of this prospective, multi-center open label study using core laboratory adjudication 
of results is to investigate the performance of the EmboTrap device against a performance goal for 
efficacy (PGefficacy). In order to claim non-inferiority against an efficacy driven performance goal, the 
lower bound of a (95%) confidence interval must be shown to be greater than a non-inferiority 
limit (NL) which is the predetermined PGefficacy. 
The PGefficacy has been derived from a meta-analysis of revascularization efficacy rates from 
approved predicate devices’ adjudicated performances as reported in the literature. 
The Performance Goal (PG) is calculated using a Bayesian Hierarchical Random Effects Meta- 
Analysis which incorporates a down-weighting of the Merci data by treating patients from the 
Trevo and Solitaire trials only as exchangeable. 
The test for non-inferiority for performance will be based on a one-sided test (at the 0.025 
significance level) for a binomial proportion with hypotheses: 
H0: PGefficacy ≤ NL   versus  H1: PGefficacy > NL 
 
An equivalent testing procedure is available by using the sample data to calculate a confidence 
interval for the population proportion. Demonstrating non-inferiority for efficacy necessitates 
rejecting the null hypothesis in favor of the alternative hypothesis, in this case based on the upper 

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limit of a 95% confidence interval for a population proportion. 
Estimates of each population parameter of interest for all other endpoints will be provided using 
appropriate confidence intervals. 
 
8.2 Sample Size Considerations 
An evaluable sample size of 176 revascularization results is needed in order to have 90% power to 
demonstrate non-inferiority against a non-inferiority limit (NL) with an efficacy level of 0.56, based 
on a one-sided exact test for a binomial proportion [5] [6] at the 0.025 significance level and 
assuming that the proportion of adjudicated successes with the EmboTrap device is 0.68. 
The estimate of device success rate used above is based on early clinical in vivo experience with 
the EmboTrap device in an open case series of the CE-marked product across five European 
centers. The TICI 2b or greater rating achieved was reported by interventionalists at over 74%. It is 
expected that adjudication may reduce this somewhat as was the case in both the Trevo II and 
SWIFT studies. Using 68% will ensure the statistical comparison is valid in the event the adjudicated 
success rate of the EmboTrap device is lower than that self-reported by 6%. 
The evaluable sample of 176 in the ARISE II trial will be representative of the population of interest 
and the revascularization results are independent of each other. 
8.2.1     Missing and Censored Data 
An extra 30% to the required evaluable patient cohort number of 176 is included to allow for roll in 
patients (up to 36 roll ins in US sites, and up to 12 in the EU) and missing data, bringing the total 
cohort to 228. Missing data will be examined, and the reasons will be investigated and reported. 
Multiple imputation methods will be used, where needed, to address any missing endpoint data in 
both the ITT and mITT analysis. 
Secondary endpoint data will be censored where rescue therapy was used. Where less than 176 
evaluable data points are available, data will be imputed using chained equations with 20 
imputations per observation [7]. 
The final analysis of the multiple imputed data will involve two steps: 1) running the analysis on 
each of the imputed datasets, and 2) aggregating the estimates from each dataset to obtain the 
final result using Rubin's rules [8] to combine the estimates while adjusting for the variance 
between imputations and across imputed datasets [9]. 
 
8.3 Analysis Methods 
8.3.1 
Primary Endpoint 
The primary endpoint will be examined using the hypothesis described in section 8.1 above, for 
both the ITT population and for the mITT described below. 
8.3.2 
Intention to Treat 
All subjects confirmed to meet the inclusion and exclusion criteria via angiography in the ARISE II 
Study will be included in the ITT analysis of safety and effectiveness, as data allows. 
 

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8.3.2.1 
Modified Intention To Treat 
In order to analyze a comparable population to that used in the predicate studies, SWIFT and 
TREVO II, the primary hypothesis will also be tested on a “Modified Intention to Treat” (mITT) 
subgroup. The mITT subgroup will reflect the lytic regime used in the TREVO II and SWIFT studies. 
• 
This subgroup will exclude screen failures for inclusion criterion 11. 
• 
This subgroup will have been treated in compliance with the protocol and will meet the 
lytic regime requirements set out in inclusion criteria 7 and 8. 
• 
And only patients who are contra-indicated for IV-tPA or in whom IV-tPA has failed will be 
included in the mITT analysis. Failure of IV-tPA is defined as angiographic evidence of 
persistent target vessel occlusion, one hour or more after the initiation of IV-tPA therapy. 
The cut off time point for initiation of lytic therapy will be in line with the FDA approved time 
indicated which is within 3 hours of stroke onset. All patients who meet the study entry criteria, 
are enrolled in the trial and were treated per the protocol (introduction of rescue therapy prior to 
three retrieval attempts with EmboTrap is a protocol violation) will be included in the mITT analysis 
sample. It is expected this will include most of the ARISE II population and the facility to enroll up 
to 228 should ensure that an evaluable sample of 176 are available for the mITT analysis. 
8.3.3 
Analysis of the Secondary endpoints 
All other binary endpoints will be treated using the Wilson exact Binomial Proportion test to allow 
a statement on the corresponding population proportion be made. 
Descriptive statistics will be used to summarize the clinical outcome variables collected on all 
vessels treated in this investigation overall and for each center. 
The typical value for each continuous response variables will be estimated using the mean and 
median while the variability will be estimated using the range, interquartile range and standard 
deviation. All categorical variables will be reported as counts and percentages. 
Box and bean plots will be generated for each continuous response variables while bar charts will 
be generated for each categorical variable. 
At study completion summaries of each clinical outcome variable will include corresponding 95% 
confidence intervals in order to provide an estimate of the corresponding population means, 
medians and proportions. 
The following primary efficacy endpoint will be examined using the model discussed: 
• 
Revascularization measured using modified Thrombolysis in Cerebrovascular Infarction 
(mTICI inclusive of the 2c rating). Successful achievement of the endpoint is defined as 
achieving a mTICI score of 2b or greater in the target vessel, following 3 or less passes of 
the EmboTrap device. 
 

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The primary safety endpoint will be evaluated descriptively: 
• 
The primary safety endpoint will be the rate of sICH together with SADEs (excluding those 
already counted in sICH). 
The secondary endpoints will be examined descriptively to further advance the safety and efficacy 
profile of the device. Full definitions are provided in section 3.2 of this protocol: 
Demographics, baseline characteristics, procedural information, and clinical outcomes (efficacy 
and safety) will also be summarized. 
The study will also perform subgroup analyses of descriptive statistics for the cohort based on 
• 
Specific vascular location of the occlusion (i.e. proximal M1/ distal M1 /M2, etc.) 
• 
Technique of treatment as described below 
Use of a balloon guide vs. no balloon guide 
Use of an intermediate catheter vs. no intermediate catheter 
A summary of the proportions of subjects receiving each category score on the mTICI scale will be 
reported. 
Note that adverse events will be adjudicated as to the relationship to the EmboTrap device, 
procedure or the disease state as well to the severity of the event. Subgroup analyses of the points 
described in the synopsis will be completed. 
8.3.4 
Analysis of Ability to Pool Data Across Investigational Sites 
This is a multi-center clinical study, with standardization of subject enrollment, data entry and 
adverse event reporting. All investigational sites will follow the requirements of a common 
protocol, data collection procedures and forms. To present the data from this clinical study in a 
summary form, a comparison of the primary endpoint across sites will be completed to determine 
if the generated data can be pooled using a test for homogeneity. 
 
8.3.5 
Deviations from the statistical plan 
Any departure or deviation from these planned statistical methodologies will be documented and 
discussed in the Statistical Analysis Plan that will include the statistical rationale for change. 
 
 
9 Amendment to the CIP 
 
Only Neuravi is allowed to modify this protocol. The change will be in the form of a protocol 
amendment. Any modification that potentially affects subjects’ rights or safety must also be 
approved by the EC or IRB and other regulatory agencies. In an emergency situation, where action 
is necessary to protect the life or physical wellbeing of the subject, a departure from the protocol 
for an individual subject may be allowed, and that departure will be for that subject only. In such 
circumstances, the investigator must notify the EC or IRB and Neuravi and must describe the 
conditions necessitating the departure from the protocol and the outcome of the emergency 
intervention in a written report. Neuravi will determine whether the subject is to continue in the 
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10 Deviations from the CIP 
 
10.1 Protocol violation 
A protocol violation is defined as an event that resulted in an increased risk to a subject or others; 
affected the right, safety or welfare of a subject; or affected the integrity of the study. Protocol 
violations include, but are not limited to, the following list: 
• 
Failure to obtain informed consent prior to patient enrolment 
• 
Enrolled patient did not meet the inclusion/exclusion criteria 
• 
Source data permanently lost 
• 
Introduction of rescue therapy prior to attempting revascularization with EmboTrap for 
three passes. 
 
10.2 Protocol deviation 
Any other events that do not comply with the requirements of the protocol will be considered 
protocol deviations. 
 
Protocol deviations include, but are not limited to, the following list: 
 
• 
Incorrect version of the informed consent form used. 
• 
Patient did not attend follow-up visit or follow-up visit was outside the required window. 
 
All protocol violations and deviations from the study protocol must be reported to the appointed 
Neuravi representative/ study monitor on a protocol violation/deviation form, regardless of 
whether medically justifiable, pre-approved by Neuravi or taken to protect the subject in an 
emergency. In addition, the investigator is required to adhere to the ethics committee/IRB 
procedures for reporting protocol violations and deviations. 
Investigators must obtain prior approval from Neuravi before initiating deviations from the 
investigational protocol, except in situations where necessary to protect the life or physical well- 
being of a subject in an emergency situation, or situations beyond the investigator’s control (such 
as subjects not attending scheduled follow-up visits, etc.). Approval for deviations shall be 
documented in writing and maintained in the investigator and clinical study management files. All 
deviations will be reported to Neuravi, regardless of medical justification, pre-approval by Neuravi, 
or emergency nature. Subject-specific protocol deviations will be reported using the protocol 
deviation form eCRF. Non-subject-specific protocol deviations (e.g. unauthorized use of the 
investigational device in the US outside the study, unauthorized use of the investigational device 
in the US by a physician who has not signed the investigator agreement, etc.) shall be notified in 
writing to Neuravi   FDA regulations (21 CFR 812.140 (a) (4)) require investigators to maintain 
accurate, complete and current records, including documentation showing the dates of and 
reasons for each deviation from the protocol. Per 21 CFR 812.46 (a), failure to comply with the 
investigational plan may result in termination of the investigator’s participation in the study. 
 

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11 Device Accountability 
 
11.1 Europe 
As the study device for this clinical investigation is legally marketed and approved for use in all 
participating centers the regulatory requirements for device accountability and traceability are 
those outlined in ISO13485:2012. Device traceability will be maintained by Neuravi under the 
documented provisions of their ISO13485:2012 accredited quality system. 
 
11.2 United States 
Neuravi is responsible for the traceability of the study device (EmboTrap) for this clinical 
investigation. Neuravi assumes responsibility for maintaining the following records: 
• 
Quantity of the devices, the dates the devices are delivered to the study suite. 
• 
Lot numbers of all devices to be used for the study. 
• 
Records of the shipment of the study devices and ancillary supplies to the investigational 
site. 
 
Neuravi will ship devices only to qualified sites participating in the investigation who have the 
appropriate traceability and stock management controls in place. The appointed Neuravi 
representative/ study monitor will ensure the study site meets the record-keeping requirements 
for accountability and reconciliation of the study devices and ancillary supplies as part of the Site 
Initiation Visit. The investigator is responsible for proper storage of received devices and ancillary 
supplies at the hospital, and for maintaining a current device-tracking log for the duration of the 
study. The study monitor will review device storage conditions and the completion of the site’s 
device tracking log. Reconciliation of device disposition will be documented. The names of all 
persons who received, used, or disposed of any device at the site will be recorded. 
Records for the return of all study devices and ancillary supplies to Neuravi will be completed by 
the study site, verified by the appointed Neuravi representative (study monitor), and final 
disposition records will be maintained by Neuravi. 
 
 
12 Safety and adverse events 
 
An Adverse Event (AE) is any untoward medical occurrence in a subject that may, or may not, 
have a causal relationship with the study treatment. 
 
An Adverse Device Effect (ADE) is any untoward and unintended response to a medical device. 
This includes Serious Adverse Device Effects and any event resulting from insufficiencies or 
inadequacies in the instructions for use or the deployment of the device, and any event resulting 
from a user error. 
 

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A Serious Adverse Event (SAE) is an adverse event which 
 
a) Led to death, 
 
b) Led to serious deterioration in the health of the subject, that either resulted in 
 
1) A life-threatening illness or injury, or 
2) A permanent impairment of a body structure or a body function, or 
3) In-patient or prolonged hospitalization, or 
4) Medical or surgical intervention to prevent life-threatening illness or injury or 
permanent impairment to a body structure or a body function, 
 
NOTE: Planned hospitalization for a pre-existing condition, or a procedure required by the CIP, 
without serious deterioration in health, is not considered a serious adverse event. 
A Serious Adverse Device Effect (SADE) is one where the EmboTrap device caused, or cannot be 
ruled out as having caused, an effect that has resulted in any of the consequences characteristic of 
a serious adverse event (e.g. Vessel dissections or perforations caused by EmboTrap device). 
Procedure Related Serious Adverse Events (PRSAE) is where the interventional procedure 
caused, or can not be ruled out as having caused, an effect that has resulted in any of the 
consequences characteristic of a serious adverse event. 
Unanticipated Adverse Device Effect (UADE) means 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. 
The sponsor will report the results of an evaluation of any UADE to FDA and all reviewing IRB/ethics 
committees and investigators within 10 working days from receiving notice of the UADE. 
In addition to the events referenced above, the following procedure-related adverse events should 
be reported to Neuravi regardless whether or not the subject experienced clinical sequelae: 
• 
Vessel perforation 
• 
Intramural arterial dissection 
• 
Asymptomatic intracranial hemorrhage 
• 
Embolization in a previously uninvolved territory 
 
 
 

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The Electronic Data Capture program “www.e-capture.net” will record all subject information 
including any specific incident details for all participants in the trial. This includes all AE, ADE, SAE, 
SADE and UADE events. The program will also capture all subsequent interventions and/or 
treatments administered to the subject. The information is entered directly into the database by 
the Principle Investigator or an assigned designate at each study center who has been trained in 
the use of the program by Neuravi. The screen-shot below provides an illustration of the type of 
information recorded by the program. 
 
 
 
12.1 Clinical Events Committee (CEC) 
An independent board consisting of stroke neurologists and neurointerventionalists who are not 
participating in the study will adjudicate serious adverse events in the trial. 
The role of the CEC will be to: 
 
• 
Adjudicate all hemorrhages documented by the Independent Core Laboratory image 
reviewer as symptomatic or asymptomatic based on the neurological status of the subject. 
• 
Adjudicate all dissections/perforations documented by the Independent Angiographic 
reviewer as to relationship to the EmboTrap device and/or IA therapy used. 
• 
Adjudicate whether an SAE is deemed attributable to the procedure, to the EmboTrap 
Device, Adjuvant therapy (IA thrombolysis, thrombectomy), or from the natural course of 
the initial stroke. 
• 
Continuous evaluation of available external data and/or knowledge, as presented at major 
congresses and /or published in peer-reviewed journals, which may have an impact on the 
adjudication and analysis of the reported events. 
 
 

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12.2 Data and Safety Monitoring Board (DSMB) 
An independent board consisting of stroke neurologists, neurointerventionalist(s) and a statistician 
who are not participating in the study will monitor the adverse events and the occurrence rate in 
the trial. 
 
The role of the DSMB will be to: 
 
• 
Monitor the SAE rate and establish specific “stopping rules” for the trial. 
• 
Make recommendations for revisions to the protocol to the EmboTrap device regarding 
safety of the study. 
• 
Periodically review and monitor aggregated and individual subject data related to safety, 
data integrity, scientific validity and overall conduct of the study, to ensure the rights, 
safety, and welfare of the study participants; 
• 
Monitor subject accrual and retention; 
• 
Consider factors external to the study when relevant information becomes available, such 
as scientific or therapeutic developments that may have an impact on the safety of the 
participants or on the ethical conduct of the study; 
• 
Ensure the confidentiality of the trial data and the results of monitoring; 
 
12.3 Event notification 
12.3.1 Adverse Events (AE) and Adverse Device Effects (ADE) 
All adverse events and adverse device effects shall be recorded on sponsor-provided adverse event 
electronic case report forms eCRF. The safety assessments will consist of Adverse Events (AE) from 
the time the ICF is signed through Day 90 for those patients enrolled, and to discharge or 72 hours 
for those patients identified as screening failures though angiographic criteria. Adverse events and 
adverse device effects shall be recorded in the form of a diagnosis, rather than providing the 
various signs and symptoms for a particular health condition. The investigator or investigator- 
appointed study personnel will complete these eCRFs. Adverse event eCRFs should be provided to 
an appointed Neuravi representative (study monitor) for review within 30 days of becoming aware 
of the event, and within 24 hours of knowledge of device related adverse events. Copies of 
related records and reports shall be provided to Neuravi upon request. If the Investigator is made 
aware of any SAEs after Day 90, these should also be reported to Neuravi or its designee 
provided the SAE is considered related to the investigational device. The site would then provide 
a completed SAE form within 1 business day and the event will be followed until resolution, or 
until adequate stabilization is met. 
An AE that occurs after the ICF has been signed and before the treatment with the EmboTrap has 
started is identified as a pretreatment AE (PTAE). This will include AEs occurring in those patients 
identified as screening failures through the angiographic inclusion or exclusion criteria. An AE that 
occurs after treatment using EmboTrap has started will be considered a treatment emergent AE 
(TEAE). All AEs must be recorded and reported accordingly, whether they appear causally related 
to the interventional procedure, or not. Adverse events will be followed until the outcome is 
known or until the Investigator feels no further medical follow-up is warranted. 
 

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All AEs will be reported verbatim as provided by the investigator. The AEs will be categorized using 
MedDRA Coding of Adverse Events nomenclature Standardized nomenclature that will be 
ascertained includes lowest level and preferred MedDRA terms, MedDRA System Organ Class. The 
Adverse Events will be monitored and trended by Neuravi and reported to the clinical events 
committee and DSMB for review and adjudication on a periodic basis. Adverse Events are subject 
to adjudication as detailed in section 12.1. 
12.3.2 Serious Adverse Events (SAE) and Serious Adverse Device Effects (SADE) 
The investigator must notify the appointed Neuravi representative/ study monitor of all serious 
adverse events and serious adverse device effects immediately after becoming aware of the event 
(no later than 24 hours from being notified of the event). The investigator may also contact the 
appointed Neuravi Representative/ study monitor for assistance in determining whether or not the 
event in question is considered serious. Notification should be provided by completing all available 
fields of the adverse event eCRF and then faxing or sending the form by e-mail to the appointed 
Neuravi representative. 
Any Serious Adverse Event (SAE) or Serious Adverse Device Effect (SADE) must be reported “in 
writing” to Neuravi within 5 days of knowledge. Copies of all related correspondence and 
documentation shall be provided to the appointed Neuravi representative/ study monitor. 
Should potential SAEs or SADEs be discovered during the study of which the investigator was not 
aware, Neuravi or the appointed Neuravi Ltd representative/ study monitor will provide relevant 
documentation within 10 days from becoming aware of the event for the investigator’s review and 
submission to the ethics committee, if applicable. 
12.3.3 Device failure, malfunction, misuse and near incidents 
All device failures, malfunctions, misuse and near incidents (as defined below) will be documented 
on the electronic case report form and reported to Neuravi within 1 working day after the 
investigator becomes aware of the event, and reported to the IRB as required. 
• 
Device failure: A device has failed if it is used according to the labeling, including without 
limitation, instructions for use, and applicable standards of medical practice but does not 
perform according to the labeling and negatively impacts the treatment. 
• 
Device malfunction: A device malfunction is a change in the function of the device that is 
not described in the labeling and that may or may not affect device performance. 
• 
Device misuse: A misused device, i.e. one that is not used by the investigator in compliance 
with applicable standards of medical practice, including without limitation, those 
described in the instructions for use and labeling, will not be considered a malfunction. 
 
 

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13 Site Initiation 
 
Neuravi or a representative of Neuravi will conduct a training session with the study site team as 
described in 13.1. 
Prior to enrolling subjects at a study site, the following documentation must be provided to Neuravi 
or a representative of Neuravi: 
• 
IRB/EC approval for the Investigational Plan. 
• 
IRB/EC and Neuravi approved Informed Consent Form for the study. 
• 
Investigator(s’) curriculum vitae (CV). 
• 
Financial Disclosure(s) for the PI and Sub/Co-I(s). 
• 
Signed Investigator’s Agreement. 
• 
Signed Clinical Study Agreement (CSA). 
• 
Training Log documentation to verify the appropriate study staff has been trained on the 
protocol, device, eCRFs and study conduct. 
 
13.1 Training 
Appropriate clinical site personnel at each investigational site, including Principal Investigator, 
Sub/Co-Investigator(s), and Research Co-ordinator(s), will be trained to the investigational plan. To 
ensure proper device usage, data collection and protocol compliance, Neuravi will schedule an 
initiation visit at each site. Investigator/Site Personnel will undergo training prior to performing any 
study-related procedures. All training must be documented. Training to the investigational plan 
will include the following topics: 
• 
Study objectives. 
• 
Protocol review and compliance. 
• 
Responsibilities and obligations of the investigator/study site team. 
• 
Delegation of authority for study-related tasks. 
• 
The Instructions for Use of the EmboTrap® Revascularization Device. 
• 
Informed Consent process, including any relevant IRB/EC requirements. 
• 
Techniques for identification of eligible subjects. 
• 
Study documentation required (essential documents). 
• 
Electronic Case Report Forms and completion instructions. 
• 
Documentation of protocol deviations. 
• 
Adverse, Serious Adverse Event Reporting. 
• 
Product malfunction reporting. 
• 
Image submission procedure. 
• 
General guidelines for good clinical practices. 
• 
Follow-up scheduling. 
• 
Regulatory requirements. 
 
 

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Existing study site personnel who have been delegated new tasks and new study site personnel 
will undergo training to the investigational plan, as appropriate. 
 
 
14 Study monitoring 
 
The study data will be monitored regularly by a dedicated monitor to make sure that all data are 
correct. There will be a site initiation visit, the first monitoring visit will occur as soon as possible 
after enrollment of the first subject followed by a visit after the fourth subject is enrolled during 
the enrolment phase. A minimum of one monitoring visit (per site) will be performed during the 
follow-up phase.  
When the monitor requests additional data or clarification of data for the eCRF, the request must 
be answered satisfactorily before the next monitoring visit. The principal investigator must sign all 
eCRFs. Completed eCRF will be electronically signed off by the study monitor after they have been 
verified against source data. For SAEs or SADEs discovered during the study of which the 
investigator was not aware, Neuravi or the appointed Neuravi representative/study monitor will 
provide relevant documentation within 10 days from becoming aware of the event for the 
investigator’s review and submission to the ethics committee, if applicable. 
There will be a site closure visit to ensure all documentation is in place and all outstanding items 
have been addressed. 
 
 
15 Data collection 
 
15.1 Data Management Responsibilities 
The handling of data, including data quality assurance, will comply with regulatory guidelines (for 
example, GCP) and the sponsor’s SOPs and work instructions. All steps and actions taken regarding 
data management and quality assurance will be documented in the sponsor’s SOPs and data 
handling guidelines. 
Completed eCRFs will be 100% verified against source data and visually checked by the study 
monitor for completeness, consistency, and legibility. 
 
All adverse event terms recorded on the eCRF will be entered into the sponsor’s safety database. 
 
All data on the eCRFs will be entered into a validated database. Edit checks will be implemented to 
ensure data quality and accuracy. Responses to requests for further clarification of data recorded 
in the eCRF will be answered, dated, and electronically signed by the investigator. Changes will be 
implemented in the sponsor’s database and the data review and validation procedures will be 
repeated as needed. 
At the end of the study, the database will be locked and the data will be released for reporting and 
statistical evaluation. 
 

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15.2 Confidentiality 
The investigator and institution involved in this study will only provide direct access to source data 
and documents to the sponsor, Neuravi, and to appropriate authorities for the purposes of 
monitoring, audit, ethics committee review or regulatory inspection. Each subject taking part in 
the study will have agreed explicitly to such access in writing. 
All subject data will always be treated with strict adherence to professional standards of 
confidentiality. All reports and communications relating to subjects in the study will identify the 
subjects by their subject ID number only. 
 
15.3 Electronic Case Report Forms 
Data collected for each subject will be recorded on an electronic Case Report Form (eCRF) provided 
by Neuravi Instructions for proper completion will be provided. The investigator is responsible for 
ensuring that all sections of each eCRF are complete and correct and that those entries can be 
verified against source data (such as patient hospital files or programmer print-outs). 
 
15.4 Source Documentation 
Investigators are required to prepare and maintain adequate and accurate case histories, recording 
all observations and other data pertinent to the investigation on each subject. 
 
15.5 Data record keeping 
All study material shall be stored for at least 10 years and only destroyed after written approval 
from Neuravi 
 
 
16 Audits/Inspections 
 
An independent audit by Neuravi or external regulatory agencies from the investigator’s own 
country or from abroad may take place at any time during or after the study. This may include on- 
site inspections and source data verification at the investigator’s hospital. If the authorities 
announce inspection, the investigator should inform Neuravi immediately. 
 
 
17 Criteria for Terminating Study 
 
The Sponsor reserves the right to terminate the study but intends only to exercise this right for 
valid scientific or administrative reasons and reasons related to protection of patients. 
Investigators and associated IRB will be notified in writing in the event of termination. 
 
Possible reasons for study termination include: 
• 
The discovery of an unexpected, significant, or unacceptable risk to the patients enrolled 
in the study. 
• 
A decision on the part of the sponsor to suspend or discontinue development of the device. 

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18 Criteria for Terminating a Study Center 
 
The sponsor reserves the right to stop the enrollment of patients at a study center at any time 
after the study initiation visit if no patients have been enrolled or if the center has multiple or 
severe protocol violations without justification or fails to follow remedial actions. Possible 
reasons for terminating a study center include: 
• 
Insufficient enrolment rate i.e. less than 1 patient in a 10 week period. 
• 
Repeated failure to complete CRFs in a timely manner. 
• 
Failure to obtain Informed Consent. 
• 
Failure to report serious adverse events within 24 hours of knowledge. 
• 
Loss of (or unaccounted for) investigational product inventory. 
 
 
19 Study Finances 
 
A Clinical Investigation Agreement (or equivalent) will be prepared by Neuravi, which will be signed 
by the participating site. This agreement describes the legal conditions, conditions for financial 
compensation, and reimbursement details for the co-operation between Neuravi and the 
investigator in this study. 
 
 
20 Study Management 
 
The flow chart in Figure 5 outlines the supervisory bodies that will oversee all clinical trial activities 
including protocol development and protocol amendment during study conduct. Neuravi Inc. as 
the sponsor will perform monitoring at each site to ensure protection of the rights of subjects, the 
safety of subjects, and the quality and integrity of the data collected and submitted according to 
FDA regulations. The Study Principal Investigator will be available at all times to provide 
consultation to study investigators regarding any technical and procedural issues that may arise 
during the treatment procedure. 
 

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Permanent Members 
Overall Study PI 
Co PI EU NeuroInterventionalist 
Independent US based Neurologist 
Independent EU based Neurologist 
Rotating based on volume enrolment 
- 
3 US based NeuroInterventionalists 
- 
3 EU based NeuroInterventionalists 
1 Sponsor representative 
Executive Steering Committee 
 
 
 
Independent Data Safety 
Monitoring Board (DSMB) 
1 independent chair 
1 independent EU based Neurologist 
1 independent US based 
Neurointerventionalist 
1 biostatistician 
 
 
 
 
 
 
Figure 5: Supervision responsibility for the Clinical Investigation 
 
 
21 Clinical trial insurance 
 
Product liability insurance is in place for the EmboTrap device use as described under the 
Instructions for use. Neuravi maintains appropriate product liability insurance coverage as 
required under applicable laws and regulations and will comply with applicable local law 
and custom concerning specific insurance coverage. An insurance statement/ certificate will be 
provided to the Ethics Committee/IRB. 
 
The CEC will be a subcommittee of the 
DSMB comprising an independent 
Neurologist, independent 
Neurointerventionalist and a tie breaker 
Neurointerventionalist. 

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22 Publications Plan 
 
All information concerning the EmboTrap device or Neuravi (e.g. patent applications, 
manufacturing processes, basic scientific data, and materials information) supplied to the 
investigator by Neuravi and not previously published is considered confidential and shall remain 
the sole property of Neuravi. The investigator agrees to use this information only in accomplishing 
the study and will not use it or the data generated from the study for other purposes without first 
obtaining the written consent of Neuravi. 
It is understood that Neuravi will use the information developed in this clinical study as part of a 
development program for the EmboTrap device, and therefore may disclose this information as 
required to other Neuravi clinical investigators or to government regulatory agencies. The 
investigator understands that she or he has the obligation to provide complete test results and all 
data developed during this study to Neuravi or its designate. 
Every effort will be made to publish the results of this study irrespective of whether the findings 
are in favor of the EmboTrap device. To this end, and to avoid publication bias, the ARISE II study 
will be registered, prior to enrolment commencing, on the clinicaltrials.gov database. 
A Publications Committee will be formed to review and publish the data from the study. This 
committee will include the principal investigator, co-principal investigator, and one representative 
of the sponsor. The committee will create a publication policy describing in detail the organization 
of authorship. The Publications Committee will write/review all drafts of abstracts and full-length 
manuscripts, and will choose the appropriate journal (for manuscripts) or meeting (for abstracts) 
for submission. All members of the Executive Steering Committee will be named on the study 
report publication in order of volume of enrollment. For clarity, the Principal Investigators will have 
the final decision making and editorial rights on the paper submitted for publication. 
 

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Bibliography 
 
[1] E. C. Jauch, J. L. Saver, H. P. Adams, A. Bruno, J. J. Connors, B. M. Demaerschalk, P. Khatri, P. 
W. McMullan, A. I. Qureshi, K. Rosenfield, P. A. Scott, D. R. Summers, D. Z. Wang, M. 
Wintermark, H. Yonas, American Heart Association Stroke Council, Council on 
Cardiovascular Nursing, Council on Peripheral Vascular Disease and Council on Clinical 
Cardiology, “Guidelines for the early management of patients with acute ischemic stroke: a 
guideline for healthcare professionals from the American Heart Association/American 
Stroke Association,” Stroke, vol. 44, no. 3, pp. 870-947, 2013. 
[2] W. Hacke, M. Kaste, C. Fieschi, D. Toni, E. Lesaffre, R. von Kummer, G. Boysen, E. Bluhmki, 
G. Höxter and M. H. Mahagne, “Intravenous thrombolysis with recombinant tissue 
plasminogen activator for acute hemispheric stroke. The European Cooperative Acute 
Stroke Study (ECASS),” The Journal of the American Medical Association, vol. 274, no. 13, 
pp. 1017-1025, 1995. 
[3] V. Larrue, R. von Kummer, A. Müller and E. Bluhmki, “Risk Factors for Severe Hemorrhagic 
Transformation in Ischemic Stroke Patients Treated with Recombinant Tissue Plasminogen 
Activator: A Secondary Analysis of the European-Australasian Acute Stroke Study (ECASS 
II),” Stroke, vol. 32, no. 2, pp. 438-441, 2001. 
[4] R. Sacco, S. Kasner, J. Broderick, L. Caplan, J. Connors, A. Culebras, M. Elkind, M. George, A. 
Hamdan, R. Higashida, B. Hoh, L. Janis, C. Kase, D. Kleindorfer, J. Lee, M. Moseley, E. 
Peterson and T. Turan, “An updated definition of stroke for the 21st century: a statement 
for healthcare professionals from the American Heart Association/American Stroke 
Association,” Stroke, vol. 44, no. 7, pp. 2064-2089, 2013. 
[5] W. C. Blackwelder, “Equivalence Trials.,” Encyclopedia of Biostatistics, vol. 2, pp. 1367-1372, 
1998. 
[6] J. L. Fleiss, B. Levin and M. C. Paik, Statistical Methods for Rates and Proportions, Wiley, 
2003. 
[7] I. R. White, P. Royston and A. M. Wood, “Multiple imputation using chained equations: 
Issues and guidance for practice,” Statistics in Medicine, vol. 30, no. 4, pp. 377-399, 2011. 
[8] D. B. Rubin, Multiple Imputation for Nonresponse in Surveys, New York: John Wiley & Sons, 
1987. 
[9] J. L. Schafer and J. W. Graham, “Missing data: our view of the state of the art,” Psychological 
Methods, vol. 7, no. 2, pp. 147-177, 2002. 
 
 

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Appendix A - DECLARATION OF HELSINKI 
 
Adopted by the 18th WMA General Assembly, Helsinki, Finland, June 1964  and amended  by the: 
29th WMA General Assembly, Tokyo, Japan, October 1975 35th WMA General Assembly, Venice, 
Italy, October 1983 41st WMA General Assembly, Hong Kong, September 1989 48th WMA General 
Assembly, Somerset West, South Africa, October 1996 52nd WMA General Assembly, Edinburgh, 
Scotland, October 2000 53rd WMA General Assembly, Washington, DC, USA, October 2002 (Note 
of Clarification on paragraph 29 added) 55th  WMA  General Assembly, Tokyo, Japan, October 
2004 (Note of Clarification on Paragraph 30  added) 59th WMA General Assembly, Seoul, Korea, 
October 2008 
 
A. INTRODUCTION 
1. The World Medical Association (WMA) has developed the Declaration of Helsinki as a statement 
of ethical principles for medical research involving human subjects, including research on 
identifiable human material and data. The Declaration is intended to be read as a whole and each 
of its constituent paragraphs should not be applied without consideration of all other relevant 
paragraphs. 
2. Although the Declaration is addressed primarily to physicians, the WMA encourages other 
participants in medical research involving human subjects to adopt these principles. 
3. It is the duty of the physician to promote and safeguard the health of patients, including those 
who are involved in medical research. The physician's knowledge and conscience are dedicated 
to the fulfilment of this duty. 
4. The Declaration of Geneva of the WMA binds the physician with the words, "The health of my 
patient will be my first consideration," and the International Code of Medical Ethics declares that, 
"A physician shall act in the patient's best interest when providing medical care." 
5. Medical progress is based on research that ultimately must include studies involving human 
subjects. Populations that are underrepresented in medical research should be provided 
appropriate access to participation in research. 
 
6. In medical research involving human subjects, the well-being of the individual research subject 
must take precedence over all other interests. 
7. The primary purpose of medical research involving human subjects is to understand the causes, 
development and effects of diseases and improve preventive, diagnostic and therapeutic 
interventions (methods, procedures and treatments). Even the best current interventions must 
be evaluated continually through research for their safety, effectiveness, efficiency, accessibility 
and quality. 
 
8. In medical practice and in medical research, most interventions involve risks and burdens. 
 
 

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9. Medical research is subject to ethical standards that promote respect for all human subjects 
and protect their health and rights. Some research populations are particularly vulnerable and 
need special protection. These include those who cannot give or refuse consent for themselves 
and those who may be vulnerable to coercion or undue influence. 
10. Physicians should consider the ethical, legal and regulatory norms and standards for research 
involving human subjects in their own countries as well as applicable international norms and 
standards. No national or international ethical, legal or regulatory requirement should reduce or 
eliminate any of the protections for research subjects set forth in this Declaration. 
 
B. PRINCIPLES FOR ALL MEDICAL RESEARCH 
11. It is the duty of physicians who participate in medical research to protect the life, health, 
dignity, integrity, right to self-determination, privacy, and confidentiality of personal information 
of research subjects. 
12. Medical research involving human subjects must conform to generally accepted scientific 
principles, be based on a thorough knowledge of the scientific literature, other relevant sources 
of information, and adequate laboratory and, as appropriate, animal experimentation. The 
welfare of animals used for research must be respected. 
13. Appropriate caution must be exercised in the conduct of medical research that may harm the 
environment. 
14. The design and performance of each research study involving human subjects must be clearly 
described in a research protocol. The protocol should contain a statement of the ethical 
considerations involved and should indicate how the principles in this Declaration have been 
addressed. The protocol should include information regarding funding, sponsors, institutional 
affiliations, other potential conflicts of interest and incentives for subjects and provisions for 
treating and/or compensating subjects who are harmed as a consequence of participation in the 
research study. The protocol should describe arrangements for post-study access by study 
subjects to interventions identified as beneficial in the study or access to other appropriate care 
or benefits. 
15. The research protocol must be submitted for consideration, comment, guidance and approval 
to a research ethics committee before the study begins. This committee must be independent of 
the researcher, the sponsor and any other undue influence. It must take into consideration the 
laws and regulations of the country or countries in which the research is to be performed as well 
as applicable international norms and standards but these must not be allowed to reduce or 
eliminate any of the protections for research subjects set forth in this Declaration. The committee 
must have the right to monitor ongoing studies. The researcher must provide monitoring 
information to the committee, especially information about any serious adverse events. The 
committee may make no change to the protocol without consideration and approval. 
 
 

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16. Medical research involving human subjects must be conducted only by individuals with the 
appropriate scientific training and qualifications. Research on patients or healthy volunteers 
requires the supervision of a competent and appropriately qualified physician or other health care 
professional. The responsibility for the protection of research subjects must always rest with the 
physician or other health care professional and never the research subjects, even though they 
have given consent. 
17. Medical research involving a disadvantaged or vulnerable population or community is only 
justified if the research is responsive to the health needs and priorities of this population or 
community and if there is a reasonable likelihood that this population or community stands to 
benefit from the results of the research. 
18. Every medical research study involving human subjects must be preceded by careful 
assessment of predictable risks and burdens to the individuals and communities involved in the 
research in comparison with foreseeable benefits to them and to other individuals or 
communities affected by the condition under investigation. 
19. Every clinical trial must be registered in a publicly accessible database before recruitment of 
the first subject. 
20. Physicians may not participate in a research study involving human subjects unless they are 
confident that the risks involved have been adequately assessed and can be satisfactorily 
managed. Physicians must immediately stop a study when the risks are found to outweigh the 
potential benefits or when there is conclusive proof of positive and beneficial results. 
21. Medical research involving human subjects may only be conducted if the importance of the 
objective outweighs the inherent risks and burdens to the research subjects. 
22. Participation by competent individuals as subjects in medical research must be voluntary. 
Although it may be appropriate to consult family members or community leaders, no competent 
individual may be enrolled in a research study unless he or she freely agrees. 
23. Every precaution must be taken to protect the privacy of research subjects and the 
confidentiality of their personal information and to minimize the impact of the study on their 
physical, mental and social integrity. 
24. In medical research involving competent human subjects, each potential subject must be 
adequately informed of the aims, methods, sources of funding, any possible conflicts of interest, 
institutional affiliations of the researcher, the anticipated benefits and potential risks of the study 
and the discomfort it may entail, and any other relevant aspects of the study. The potential 
subject must be informed of the right to refuse to participate in the study or to withdraw consent 
to participate at any time without reprisal. Special attention should be given to the specific 
information needs of individual potential subjects as well as to the methods used to deliver the 
information. After ensuring that the potential subject has understood the information, the 

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physician or another appropriately qualified individual must then seek the potential subject's 
freely-given informed consent, preferably in writing. If the consent cannot be expressed in writing, 
the non-written consent must be formally documented and witnessed. 
25. For medical research using identifiable human material or data, physicians must normally seek 
consent for the collection, analysis, storage and/or reuse. There may be situations where consent 
would be impossible or impractical to obtain for such research or would pose a threat to the 
validity of the research. In such situations the research may be done only after consideration and 
approval of a research ethics committee. 
26. When seeking informed consent for participation in a research study the physician should be 
particularly cautious if the potential subject is in a dependent relationship with the physician or 
may consent under duress. In such situations the informed consent should be sought by an 
appropriately qualified individual who is completely independent of this relationship. 
27. For a potential research subject who is incompetent, the physician must seek informed 
consent from the legally authorized representative. These individuals must not be included in a 
research study that has no likelihood of benefit for them unless it is intended to promote the 
health of the population represented by the potential subject, the research cannot instead be 
performed with competent persons, and the research entails only minimal risk and minimal 
burden. 
28. When a potential research subject who is deemed incompetent is able to give assent to 
decisions about participation in research, the physician must seek that assent in addition to the 
consent of the legally authorized representative. The potential subject's dissent should be 
respected. 
29. Research involving subjects who are physically or mentally incapable of giving consent, for 
example, unconscious patients, may be done only if the physical or mental condition that prevents 
giving informed consent is a necessary characteristic of the research population. In such 
circumstances the physician should seek informed consent from the legally authorized 
representative. If no such representative is available and if the research cannot be delayed, the 
study may proceed without informed consent provided that the specific reasons for involving 
subjects with a condition that renders them unable to give informed consent have been stated in 
the research protocol and the study has been approved by a research ethics committee. Consent 
to remain in the research should be obtained as soon as possible from the subject or a legally 
authorized representative. 
30. Authors, editors and publishers all have ethical obligations with regard to the publication of 
the results of research. Authors have a duty to make publicly available the results of their research 
on human subjects and are accountable for the completeness and accuracy of their reports. They 
should adhere to accepted guidelines for ethical reporting. Negative and inconclusive as well as 
positive results should be published or otherwise made publicly available. Sources of funding, 
institutional affiliations and conflicts of interest should be declared in the publication. Reports of 

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research not in accordance with the principles of this Declaration should not be accepted for 
publication. 
 
C. ADDITIONAL PRINCIPLES FOR MEDICAL RESEARCH COMBINED WITH 
MEDICAL CARE 
31. The physician may combine medical research with medical care only to the extent that the 
research is justified by its potential preventive, diagnostic or therapeutic value and if the physician 
has good reason to believe that participation in the research study will not adversely affect the 
health of the patients who serve as research subjects. 
32. The benefits, risks, burdens and effectiveness of a new intervention must be tested against 
those of the best current proven intervention, except in the following circumstances: 
• 
The use of placebo, or no treatment, is acceptable in studies where no current proven 
intervention exists; or 
• 
Where for compelling and scientifically sound methodological reasons the use of placebo 
is necessary to determine the efficacy or safety of an intervention and the patients who 
receive placebo or no treatment will not be subject to any risk of serious or irreversible 
harm. Extreme care must be taken to avoid abuse of this option. 
33. At the conclusion of the study, patients entered into the study are entitled to be informed 
about the outcome of the study and to share any benefits that result from it, for example, access 
to interventions identified as beneficial in the study or to other appropriate care or benefits. 
34. The physician must fully inform the patient which aspects of the care are related to the 
research. The refusal of a patient to participate in a study or the patient's decision to withdraw 
from the study must never interfere with the patient-physician relationship. 
35. In the treatment of a patient, where proven interventions do not exist or have been 
ineffective, the physician, after seeking expert advice, with informed consent from the patient or 
a legally authorized representative, may use an unproven intervention if in the physician's 
judgment it offers hope of saving life, re-establishing health or alleviating suffering. Where 
possible, this intervention should be made the object of research, designed to evaluate its safety 
and efficacy. In all cases, new information should be recorded and, where appropriate, made 
publicly available. 
 
 

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Appendix B - Terms and definitions 
 
For the purposes of this protocol the following terms and definitions apply. 
 
1. 
Adverse device effect (ADE) 
Adverse event related to the use of an investigational medical device. 
NOTE 1 
This definition includes adverse events resulting from insufficient or inadequate 
instructions for use, deployment, implantation, installation, or operation, or any 
malfunction of the investigational medical device. 
NOTE 2 
This definition includes any event resulting from use error or from intentional misuse of 
the investigational medical device. 
 
2. 
Adverse event (AE) 
Any untoward medical occurrence in a subject that may, or may not, have a causal relationship 
with the study treatment.  
NOTE 1 
This definition includes events related to the investigational medical device or the 
comparator. 
NOTE 2 
This definition includes events related to the procedures involved. 
NOTE 3 
For users or other persons, this definition is restricted to events related to investigational 
medical devices. 
 
3. 
Audit 
Systematic independent examination of activities and documents related to clinical investigation 
to determine whether these activities were conducted, and the data recorded, analyzed and 
accurately reported, according to the CIP, standard operating procedures, this International 
Standard and applicable regulatory requirements. 
 
4. 
Clinical investigation 
Systematic investigation in one or more human subjects, undertaken to assess the safety or 
performance of a medical device. 
NOTE 
“Clinical trial” or “clinical study” are synonymous with “clinical investigation”. 
 
5. 
Clinical investigation plan (CIP) 
Document that state(s) the rationale, objectives, design and proposed analysis, methodology, 
monitoring, conduct and record-keeping of the clinical investigation. 
 
 

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6. 
Clinical investigation report 
Document describing the design, execution, statistical analysis and results of a clinical 
investigation. 
 
7. 
Clinical performance 
Behaviour of a medical device or response of the subject(s) to that medical device in relation to its 
intended use, when correctly applied to appropriate subject(s). 
 
8. 
Contract research organization (CRO) 
Person or organization contracted by the sponsor to perform one or more of the sponsor's clinical 
investigation-related duties and functions. 
 
9. 
Coordinating investigator 
Investigator who is appointed by the sponsor to coordinate work in a multicenter clinical 
investigation. 
 
10. 
Data Safety and Monitoring Board (DSMB) 
Independent committee established by the sponsor to assess, at intervals, the progress of the 
clinical investigation, the safety data or the critical performance endpoints and to recommend the 
sponsor whether to continue, suspend, modify, or stop the clinical investigation. 
 
11. 
Deviation 
Instance(s) of failure to follow, intentionally or unintentionally, the requirements of the CIP. 
 
12. 
Device deficiency 
Inadequacy of a medical device with respect to its identity, quality, durability, reliability, safety or 
performance. 
NOTE 
Device deficiencies include malfunctions, use errors, and inadequate labelling. 
 
13. 
Informed consent process 
Process by which an individual is provided information and is asked to voluntarily participate in a 
clinical investigation. 
NOTE 
Informed consent is documented by means of a written, signed and dated informed 
consent form. 
 
14. 
Investigator 
Individual member of the investigation site team designated and supervised by the principal 
investigator at an investigation site to perform critical clinical-investigation-related procedures or 
to make important clinical investigation-related decisions. 
 
 

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NOTE 
An individual member of the investigation site team can also be called “sub-investigator” 
or “co-investigator”. 
 
15. 
Investigator's brochure (IB) 
Compilation of the current clinical and non-clinical information on the investigational medical 
device(s), relevant to the clinical investigation. 
 
16. 
IV-tPA failure 
Failure of IV-tPA is defined as angiographic evidence of persistent target vessel occlusion 60 
minutes or more after initiation of IV-tPA. 
 
17. 
Legally authorized representative 
Individual or judicial or other body authorized under applicable law to consent, on behalf of a 
prospective subject, to the subject's participation in the clinical investigation. 
 
18. 
Malfunction 
Failure of an investigational medical device to perform in accordance with its intended purpose 
when used in accordance with the instructions for use or CIP 
 
19. 
Modified Thrombolysis in Cerebrovascular Infarction (mTICI) 
 
0 
No perfusion 
1 
Perfusion past the initial obstruction but limited distal branch filling with little or slow 
distal perfusion 
2a 
Perfusion of less than half of the vascular distribution of the occluded artery 
2b 
Perfusion of half or greater of the vascular distribution of the occluded artery 
3 
Full perfusion with filling of all distal branches 
AJNR March 2008 29: 582-587. “Revascularization Results in the Interventional Management of Stroke II Trial”. T 
Tomsick et al. 
 
 

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19b. mTICI inclusive of the 2c rating: 
 
 
 Consensus clarification* 
0 
 No perfusion 
1 
Antegrade reperfusion past the initial occlusion, but limited distal branch filling 
with little or slow distal reperfusion 
2 
Incomplete antegrade reperfusion wherein the contrast passes the occlusion and 
opacifies the distal arterial bed but there are residual antegrade perfusion deficits 
• 2a  Antegrade reperfusion of less than half of the occluded target artery 
previously ischemic territory (eg, in 1 major division of the MCA and its 
territory)  
• 2b Antegrade reperfusion of more than half of the previously occluded target 
artery ischemic territory (eg, in 2 major divisions of the MCA and their 
territories) 
• 2c Antegrade reperfusion of >90% but less than TICI 3 or near complete 
reperfusion 
3 
Complete antegrade reperfusion of the previously occluded target artery ischemic 
territory, with absence of visualized occlusion in all distal branches  
*Clarification on practical application of this scale based on “Recommendations on Angiographic 
Revascularization Grading Standards for Acute Ischemic Stroke: A Consensus Statement” of the Stroke J 
American Heart Association 2013; 44:2650-2663. Originally published online August 6, 2013 Zaidat et al. 
20. 
Monitoring 
Act of overseeing the progress of a clinical investigation and to ensure that it is conducted, 
recorded, and reported in accordance with the CIP, written procedures, this International 
Standard, and the applicable regulatory requirements. 
 
21. 
Point of enrolment 
Time at which, following recruitment, a subject signs and dates the informed consent form 
 
22. 
Principal investigator 
Qualified person responsible for conducting the clinical investigation at an investigation site. 
NOTE 1 If a clinical investigation is conducted by a team of individuals at an investigation site, 
the principal investigator is responsible for leading the team. 
NOTE 2 Whether this is the responsibility of an individual or an institution can depend on 
national regulations. 
 
23. 
Recruitment 
Active efforts to identify subjects who may be suitable for enrolment into the clinical investigation. 
 
24. 
Serious adverse device effect (SADE) 
Adverse device effect that has resulted in any of the consequences characteristic of a serious 
adverse event. 
 
 
 

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25. 
Serious adverse event (SAE) 
Adverse event that 
a. 
Led to death, 
b. 
Led to serious deterioration in the health of the subject, that either resulted in 
1. 
a life-threatening illness or injury, or 
2. 
a permanent impairment of a body structure or a body function, or 
3. 
in-patient or prolonged hospitalization, or 
4. 
medical or surgical intervention to prevent life-threatening illness or injury or 
permanent impairment to a body structure or a body function, 
NOTE 
Planned hospitalization for a pre-existing condition, or a procedure required by the CIP, 
without serious deterioration in health, is not considered a serious adverse event. 
 
26. 
Source data 
All information in original records, certified copies of original records of clinical findings, 
observations, or other activities in a clinical investigation, necessary for the reconstruction and 
evaluation of the clinical investigation. 
 
27. 
Source document 
Printed, optical or electronic document containing source data. 
EXAMPLES Hospital records, laboratory notes, device accountability records, photographic 
negatives, radiographs, records kept at the investigation site, at the laboratories and 
at the medico-technical departments involved in the clinical investigation. 
 
28. 
Sponsor 
Individual or organization taking responsibility and liability for the initiation or implementation of 
a clinical investigation. 
 
29. 
Subject 
Individual who participates in a clinical investigation. 
 
30. 
Thrombolysis in Cerebrovascular Infarction (TICI) 
 
0 
No perfusion. 
1 
Perfusion past the initial obstruction but limited distal branch filling with little or slow 
distal perfusion. 
2a 
Perfusion of less than two-thirds of the vascular distribution of the occluded artery. 
2b 
Perfusion of two-thirds or more of the vascular distribution of the occluded artery. 
3 
Full perfusion with filling of all distal branches. 
Lancet 2012 Oct 6;380(9849):1231-40. “Trevo versus Merci retrievers for thrombectomy revascularisation of large 
vessel occlusions in acute ischaemic stroke (TREVO 2): a randomised trial”. R.G. Nogueira et al. 
 
 

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31. 
Thrombolysis in Myocardial Infarction (TIMI) 
 
0 
No perfusion 
1 
Penetration with no perfusion 
2 
Partial perfusion of the artery 
3 
Complete perfusion 
N Engl J Med. 1985 Apr 4; 312(14):932-6. “The Thrombolysis in Myocardial Infarction (TIMI) trial. Phase I findings. 
TIMI Study Group.” The TIMI Study Group. 
 
The definition of TIMI rating scale used by the adjudicating core laboratory will be identical to that used in 
the SWIFT study. 
 
32. 
Procedure Related Serious Adverse Event (PRSAE) 
 
A serious adverse event where the interventional procedure caused, or can not be ruled out as 
having caused, an effect that has resulted in any of the consequences characteristic of a serious 
adverse event. 
 
33. 
Unanticipated serious adverse device effect (USADE) 
Serious adverse device effect which by its nature, incidence, severity or outcome has not been 
identified in the current version of the risk analysis report. 
NOTE 
Anticipated  serious  adverse  device  effect  (ASADE)  is  an  effect  which  by  its  nature, 
incidence, severity or outcome has been identified in the risk analysis report. 
 
34. 
Use error 
Act or omission of an act that results in a different medical device response than intended by the 
manufacturer or expected by the user. 
NOTE 1 
Use error includes slips, lapses, and mistakes. 
NOTE 2 
An unexpected physiological response of the subject does not in itself constitute 
a use error. 
[ISO 14971:2007, definition 2.27] 
 
35. 
Vulnerable subject 
Individual whose willingness to volunteer in a clinical investigation could be unduly influenced by 
the expectation, whether justified or not, of benefits associated with participation or of retaliatory 
response from senior members of a hierarchy in case of refusal to participate. 
EXAMPLE Individuals with lack of or loss of autonomy due to immaturity or through mental 
disability, persons in nursing homes, children, impoverished persons, subjects in emergency 
situations, ethnic minority groups, homeless persons, nomads, refugees, and those incapable of 
giving informed consent. Other vulnerable subjects include, for example, members of a group with 
a hierarchical structure such as university students, subordinate hospital and laboratory 
personnel, employees of the sponsor, members of the armed forces, and persons kept in detention.