Clinical trial NCT05641844: A Double Blind, Randomized Controlled Study, Evaluating the Safety and Efficacy of RD2 Ver.02 For the Management of Anal Fistulas
Official title: A Prospective, Multi-Center, Double Blind, Randomized Controlled Study, Evaluating the Safety and Efficacy of RD2 Ver.02, For the Management of Anal Fistulas
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: NA
Conditions: Anal Fistula
Lead sponsor: RedDress Ltd.
Sponsor class: INDUSTRY
First posted: 2022-12-08
Enrollment: 110
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: OTHER

Brief summary: The goal of this clinical trial is to assesses the safety of autologous RD2 Ver.02 as compared to a control for managing transsphincteric and intersphinsteric anal fistulas.

The main questions it aims to answer are:

Assess the safety and efficacy of RD2 Ver.02 in anal fistula application, compared to control.

Complication rate by 6 months of anal fistula treatment with RD2 Ver.02 compared to control.

Recurrence of anal fistula at 12 months post-treatment Incidence of perirectal infection by 6 months in anal fistulas treated with RD2 Ver.02 compared to control.

Patients will be randomized in to 2 arms. For all patients, blood will be drawn to ensure the blinding of the patients, the fistula will be evaluated and debrided, and then the internal fistula opening will be suture-closed, and a water leak test will be performed to ensure sealing. Following the water leak test, In the treatment arm, the patient's own coagulating blood will be applied into the entire fistula tract, allowing it to clot and serve as a provisional matrix inside the fistula tract. In the control arm, the blood sample will be discarded and saline will be applied to the fistula tract.


Eligibility criteria: Inclusion Criteria:

* Subject is ≥18 years of age
* Subject has a transsphincteric or long intersphincteric anal fistula (\>1.5 cm), with a seton in place for a minimum of 1 month, deemed eligible for primary or repeat fistula repair by anorectal advancement flap or LIFT: Anterior, posterior or lateral fistula, first or recurrent, at any position circumferentially, with one external opening and one internal opening, involving \>20% of anal sphincter.
* Subjects is unable or unwilling to receive invasive surgical procedures, anorectal advancement flap or LIFT procedure, and is opting for minimally invasive technique of anal fistula management (i.e., fistula tract debridement and suturing of internal opening).
* Prior to enrollment, during the preceding 3 months subject must undergo a pelvic MRI to document intersphincteric or transsphicnteric fistula and absence of underlying abscess
* Female subjects who are capable of conceiving and all males capable of insemination must use an acceptable form of contraception in order to participate in the study and for 6 months following study procedure (acceptable forms of contraception include condoms for males and contraceptive pills or IUDs for women)

Exclusion Criteria:

* Subject who has a life expectancy of less than 24 months.
* Subjects who are cognitively impaired and have a healthcare proxy or those who are cognitively impaired and clearly do not understand the contents of the informed consent form.
* Cannot withdraw blood in the required amount (up to 15 mL).
* Women who are pregnant or currently breast feeding.
* Subject is currently receiving (i.e., within the past 30 days) or scheduled to receive systemic steroids (more than 10mg per day).
* Multiple fistula tracts, as confirmed on pelvic MRI
* Short fistula tract that in the surgeon's opinion are amenable to fistulotomy
* Active infection including perianal infection, and/or any active systemic or local infection.
* Presence of a perirectal abscess on pelvic MRI
* Presence of dominant luminal active Crohn's disease, validated by recent colonoscopy from preceding 12 months, requiring immediate therapy
* Rectal and/or anal stenosis and / or active proctitis, if this means a limitation for any surgical procedure.
* Known allergies or hypersensitivity to any of the following: antibiotics including but not limited to penicillin, streptomycin, gentamicin, aminoglycosides; Human Serum Albumin (HSA); Dulbecco Modified Eagle's Medium (DMEM); materials of bovine origin; local anaesthetics or gadolinium (MRI contrast); Known hypersensitivity to reagents and components of RD2 Ver.02 including calcium gluconate, Kaolin or citrate and ethylene oxide.
* Contraindication to MRI scan, (e.g., due to the presence of pacemakers, hip replacements, or severe claustrophobia).
* Known coagulation problems, abnormal thrombocytes level or if heparin is given intravenously. Subjects who are taking Coumadin, Aspirin, Plavix (Clopidogrel), Eliquis or Pradaxa will not be excluded.
* Patients with increased risk for the surgical procedure or major alteration of any of the following laboratory tests:

Serum Creatinine levels \>1.5 upper limit of normality (ULN) Total bilirubin \>1.5 ULN (unless predominantly non conjugated due to documented history of Gilbert's syndrome) AST/ ALT \>3.0 ULN Hemoglobin \<10.0 g/dL Platelets \<150.0 x109/L Albuminemia \<3.0 g/dL.

* Patients who do not wish to or cannot comply with study procedures.
* Patients currently receiving or having received within 12 months prior to enrolment into this clinical study, any investigational drug.
* Subjects who need surgery in the perianal region for reasons other than fistulas at the time of inclusion in the study, or for whom such surgery is foreseen in this region in the 24 weeks after treatment administration.
* Contraindication to the anesthetic procedure.
* Subject with a diagnosis of Ulcerative Colitis
* Subject with malignancy, undergoing active treatment
* Rectovaginal fistula
* History of pelvic radiation

Primary outcomes:
measure: Combined healing rate at 6 months of anal fistulas treated with RD2 Ver.02 compared to control
timeFrame: 6 months after anal fistula treatment per subject
Secondary outcomes:
measure: Recurrence of anal fistula at 12 months post-treatment in subjects with healed fistula treated with RD2 Ver.02 compared to control, to evaluate the long-term efficacy of RD2 Ver.02 Application.
timeFrame: 12 months
measure: Incidence of perirectal infection by 6 months in anal fistulas treated with RD2 Ver.02 compared to control.
timeFrame: 6 months
Other outcomes:
measure: Incidence of device-related adverse events in patients treated with RD2 Ver.02
timeFrame: 12 months
measure: Incidence of adverse events compared between RD2 Ver.02 and control arms
timeFrame: 12 months
Locations:
city: Los Angeles
country: United States
facility: Karen Zaghiyan, M.D
state: California
city: Weston
country: United States
facility: Cleveland Clinic
state: Florida
city: Chicago
country: United States
facility: University of Chicago
state: Illinois
city: Indianapolis
country: United States
facility: Franciscan Health
state: Indiana
city: Worcester
country: United States
facility: UMAS
state: Massachusetts
city: New York
country: United States
facility: Lenox Hill Hospital
state: New York
city: Pittsburgh
country: United States
facility: Allegheny Health Network
state: Pennsylvania
city: Providence
country: United States
facility: Brown surgical associates
state: Rhode Island
city: Ramat Gan
country: Israel
facility: Sheba Medical Center
Study officials:
References: