Clinical trial NCT02148705: A Study to Evaluate the Efficacy and Safety of NexoBrid in Subjects With Thermal Burns
Official title: A Multicenter, Multinational, Randomized, Controlled, Assessor Blinded Study, Performed in Subjects With Thermal Burns, to Evaluate the Efficacy and Safety of NexoBrid Compared to Gel Vehicle and Compared to Standard of Care
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Thermal Burns
Keywords: fire/flame
scalds
contact
Lead sponsor: MediWound Ltd
Sponsor class: INDUSTRY
First posted: 2014-05-28
Enrollment: 175
Sex: ALL
Minimum age (years): 18
Maximum age (years): 77
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: FACTORIAL
Primary purpose: TREATMENT

Brief summary: This study will be a three-arms study intending to demonstrate superiority of NexoBrid treatment over the Gel Vehicle placebo control treatment and over SOC in thermal burn subjects.

The study objectives are:

1. To demonstrate the efficacy of enzymatic eschar removal with NexoBrid by providing complete eschar removal as compared with Gel vehicle,
2. To demonstrate the efficacy of enzymatic eschar removal with NexoBrid by providing earlier complete eschar removal, reduction in patients' surgical burden and its related blood loss as compared to SOC,
3. To assess the safety of NexoBrid compared to SOC, including demonstration that treatment with NexoBrid does not cause an unacceptable level of harm on wound closure outcome and long term outcomes of cosmesis and function.

Detailed description: This is a multi-center, multi-national, randomized, controlled, assessor blinded, three-arm study aiming to demonstrate superiority of NexoBrid treatment over Gel Vehicle control and over SOC treatment in thermal burn subjects with burns. Following the enrollment of a patient to the study and prior to randomization Physicians will define one or more Target Wounds (TWs) per subject according to TWs definition. All subjects' deep (DPT and FT) burns that comply with the specified entrance criteria are intended to receive study treatment per the randomized study arm.

The randomization procedure will be initiated only after all Target wounds of a subject have been defined. Patients will be assigned to the treatment arm in a 3:3:1 ratio (NexoBrid: SOC : Gel Vehicle).

Patients will be treated in the same way in all study arms (NexoBrid, SOC or Gel vehicle) except for the eschar removal stage which will be performed as per the randomization study arm.

Prior to initiation of eschar removal treatment, subjects will be medicated with appropriate analgesia and undergo wound cleansing and dressing of all wounds with antibacterial solutions . Following wound cleansing and antibacterial treatments, subjects will undergo the eschar removal process as per treatment assignment (NexoBrid, SOC or Gel Vehicle, following randomization).

Subsequent to complete eschar removal, all wounds will be assessed and treated in the same manner, in accordance with post-eschar removal wound care strategy. Post eschar removal, subjects will undergo daily vital signs and pain assessments, until hospital discharge (HD) and weekly assessments of wound progress, until wound closure. Following wound closure confirmation visit, subjects will be followed up at 1, 3, 6, 12, 18 and 24 months post wound closure for long term outcomes evaluation.

Eligibility criteria: Inclusion Criteria- Patient level

1. Males and females; ≥ 18
2. Thermal burns caused by fire/flame, scalds or contact,
3. Patient total burns area ≥ 3% DPT and / or FT,
4. Patient total burns area should be ≤ 30% TBSA; SPT, DPT and/or FT in depth,
5. Informed consent can be obtained within 84 hours of the burn injury,
6. Patients who are willing and able to sign a written consent form.

Inclusion Criteria - Wound level

1. At least one wound (a continuous burn area) that is ≥0.5% TBSA (DPT and/or FT) (this minimal wound size should not including face, perineal or genital area.

   All planned target wounds (TWs) should meet the following criteria:
2. SPT area that cannot be demarcated from DPT and FT areas should be less than 50% of the % TBSA of the TW.
3. Wound's blisters can be removed/ unroofed, as judged by the investigator.

Exclusion Criteria- Patient level

1. Patients who are unable to follow study procedures and follow up period.
2. Modified Baux index ≥ 80,
3. Patients with burned charred fingers, 3rd degree in depth and possibly devoid of circulation,
4. Patients with abraded wound/s that cannot be treated by an enzymatic debrider application (NexoBrid) will be excluded from the study,
5. Patients with electrical or chemical burns,
6. Patients with circumferential (≥ 80% of the limb circumference) DPT and/or FT burns defined as Extremities at Risk (EAR) 2 as described in the protocol.
7. The following pre-enrollment dressings: a. Flammacerium, b. Silver Nitrate (AgNO3),
8. Patients with pre-enrolment wounds which are covered by eschar heavily saturated with iodine or by SSD pseudoeschar (e.g. pseudoeschar as a result of \> 12 hours SSD treatment),
9. Patients with pre-enrollment escharotomy.
10. Patients with diagnosed infections as described in Section 11.9 of study protocol,
11. Diagnosis of smoke inhalation injury.
12. Pregnant women (positive pregnancy test) or nursing mothers.
13. Poorly controlled diabetes mellitus (HbA1c\>11%) in patients with known diabetes as captured in the medical history.
14. BMI greater than 39.0 kg/m2 in patients with burn area up to 15% TBSA or BMI greater than 34.0 kg/m2 in patients with burn area more than 15% TBSA.
15. ASA greater than 2 (Appendix 13- ASA classification system)
16. Cardio-pulmonary disease (MI within 6 months prior to injury, severe pulmonary hypertension, severe COPD or pre-existing oxygen-dependent pulmonary diseases, severe broncho-pneumonia within 1 month prior to injury , steroid dependent asthma or uncontrolled asthma).
17. Pre-existing diseases which interfere with circulation (severe peripheral vascular disease, edema, lymphedema, regional lymph nodes, significant varicose veins),
18. Any conditions that would preclude safe participation in the study or adding further risk to the basic acute burn trauma (such as severe immuno-compromising diseases, life threatening trauma, severe pre-existing coagulation disorder,severe cardiovascular disorder,significant pulmonary disorder, significant liver disorder including post alcoholic abuse impaired function or neoplastic disease, blast injury)
19. Chronic systemic steroid intake,
20. History of allergy and/or known sensitivity to pineapples, papaya, Bromelain or papain,
21. Current (within 12 months prior to screening) suicide attempt,
22. Mentally incapacitated adults who are incapable of giving legal consent
23. Enrollment in any investigational drug trial within 4 weeks prior to screening,
24. Current (within 12 months prior to screening) alcohol or drug abuse (see definition in section 1.1)
25. Prisoners and incarcerated,
26. Patients who might depend on the clinical study site or investigator.

Primary outcomes:
measure: Primary Endpoint: Number of Participants With Complete Eschar Removal.
timeFrame: post application (post 2 h soaking)
Secondary outcomes:
measure: Secondary Endpoint: Number of Participants With Surgical Excision Performed or Eschar Removal for NexoBrid vs SOC (FAS)
timeFrame: Post application (post 2 h soaking) for NexoBrid arm and immediately post surgical excision for SOC arm.
measure: Secondary Endpoint: Comparison of Time (Days) to Complete Eschar Removal
timeFrame: From randomization until complete eschar removal. For NexoBrid, assessed post application (post 2 h soaking) and for SOC assessed immediately post last dressing change for non-surgical SOC arm and immediately post excision for surgical SOC arm.
measure: Secondary Endpoint: Patient-Level Comparison of Actual Blood Loss (Volume in mL) Related to Eschar Removal for NexoBrid vs SOC (FAS)
timeFrame: For NexoBrid arm, blood loss during NexoBrid application until post soaking. For SOC arm, blood loss during SOC procedures, through last dressing change for non-surgical SOC arm and through excision surgery for surgical SOC arm.
Other outcomes:
Locations:
city: Mobile
country: United States
facility: University of South Alabama Department of Surgery
state: Alabama
city: Phoenix
country: United States
facility: Maricopa Medical Center
state: Arizona
city: Aurora
country: United States
facility: University of Colorado at Denver, Teaching
state: Colorado
city: Washington
country: United States
facility: Medstar Washington Hospital Center
state: District of Columbia
city: Gainesville
country: United States
facility: University of Florida- Dept. of Surgery
state: Florida
city: Augusta
country: United States
facility: Joseph M. Still Research Foundation, Inc.
state: Georgia
city: Iowa City
country: United States
facility: The University of Iowa Hospitals and Clinics
state: Iowa
city: Kansas City
country: United States
facility: Burnett Burn Center at The University of Kansas Hospital
state: Kansas
city: Baltimore
country: United States
facility: Johns Hopkins Bayview Medical Center
state: Maryland
city: Boston
country: United States
facility: The General Hospital Corporation d/b/a Massachusetts General Hospital
state: Massachusetts
city: New York
country: United States
facility: New-York Presbyterian Hospital
state: New York
city: Stony Brook
country: United States
facility: Emergency Medicine Stony Brook University Hospital
state: New York
city: Allentown
country: United States
facility: Lehigh Valley Hospital and Health Network
state: Pennsylvania
city: Memphis
country: United States
facility: Regional Medical Center ,Regional One Health
state: Tennessee
city: Galveston
country: United States
facility: University of Texas Medical Branch
state: Texas
city: Salt Lake City
country: United States
facility: University of Utah Hospital
state: Utah
city: Seattle
country: United States
facility: HarborView Medical Center
state: Washington
city: Milwaukee
country: United States
facility: Columbia St. Mary's, Inc.
state: Wisconsin
city: Gent
country: Belgium
facility: University Hospital, Department of Plastic Surgery
city: Brno
country: Czechia
facility: Klinika popálenin a rekonstrukční chirurgie, Fakultní nemocnice Brno
city: Tbilisi
country: Georgia
facility: Khechinashvili University Hospital - Thermal Injuries
city: Berlin
country: Germany
facility: Unfallkrankenhaus Berlin Zentrum für Schwerbrandverletzte mit Plastischer Chirurgie
city: Bochum
country: Germany
facility: BG Universitätsklinikum Bergmannsheil GmbH
city: Haifa
country: Israel
facility: Rambam Medical Center
city: Napoli
country: Italy
facility: Hospital A. Cardarelli of Napoli
city: Pisa
country: Italy
facility: Ospedale di Cisanello
city: Bucharest
country: Romania
facility: Spitalul Clinic de Urgenta de Chirurgie Plastica, Reparatorie si Arsuri
city: Bucharest
country: Romania
facility: Spitalul Clinic de Urgenta "Sf. Ioan"
city: Bucharest
country: Romania
facility: Spitalul Clinic de Urgenta "Bagdasar-Arseni"
Study officials:
References: