Clinical trial NCT02326337: Efficacy, Safety and Economic Benefits of Topical Wound Oxygen Therapy in the Treatment of Chronic Diabetic Foot Ulcers
Official title: A Multi-national, Multi-center, Prospective, Randomized, Double Blinded, Placebo-controlled Trial to Evaluate the Efficacy of HyperBox Cyclical Topical Wound Oxygen Therapy (TWO2) in the Treatment of Chronic Diabetic Foot Ulcers
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Diabetic Foot Ulcer
Lead sponsor: AOTI Ltd.
Sponsor class: INDUSTRY
First posted: 2014-12-29
Enrollment: 73
Sex: ALL
Minimum age (years): 18
Maximum age (years): 89
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Group Sequential Design of a maximum of 220 subjects with two predetermined interim analyses at 73 and 146 subjects
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to evaluate the efficacy, safety and economical benefits of Cyclical Pressure Topical Wound Oxygen (TWO2) Therapy in the treatment of chronic diabetic foot ulcers. Subjects will wear a standardized off-loading device and use advanced moist wound therapy (AMWT) dressings. Following a 2 week run-in period with the standardized care and after meeting all the eligibility criteria, half the subjects will use the TWO2 device, while the other half will use a sham device.

Detailed description: Subjects meeting the initial eligibility criteria will enter a 2 week run-in period with a standardized off-loading device, advanced moist wound therapy (AMWT) dressings and will receive sharp debridement. Subjects with wounds that do not decrease more than 30% at the end of the 2 week run-in period and where all other eligibility criteria are met, will be randomized to either the TWO2 device arm, or sham (placebo) device arm.

All subjects will use the TWO2/Sham device for 90 minutes a day at their home or nursing care facility 5 times a week for the treatment phase of up to 12 weeks. Monitoring of the wound will take place with weekly clinic visits for safety and compliance assessment and documentation. Weekly wound photographs and measurements will be taken. Wounds that close at, or before, 12 weeks will continue to use TWO2/sham device, off-loading and AMWT and have an additional visit two weeks later to confirm wound closure. All subjects whether healed or not will enter a follow up period of an additional 12 and 38 weeks.

The maximum duration for participation in the trial is 54 weeks. During the follow-up phase, subjects will receive standard care according to the clinician's recommendation and will be asked not to participate in another wound care trial during this period.

Eligibility criteria: Inclusion Criteria:

* Subject has a documented diagnosis of Diabetes mellitus Type 1 or 2
* Foot ulcer at or below ankle with duration of more than 4 weeks but no longer than 1 year
* If the index ulcer is a post amputation wound date of surgery must be \> 30 days
* 2 week run in period with less than 30% wound size reduction
* University of Texas Grade 1A, 1B, 1C, 1D, 2A, 2B, 2C, or 2D (Appendix I)
* Ulcer is ≥ 1cm2 and ≤ 20cm2 after debridement at start of run-in period
* If more than one ulcer is present on the foot, only the largest is considered in the study (Index ulcer)
* Index ulcer must be ≥ 1cm away from any other ulcers present on the foot
* Adequate perfusion with ABI \> 0.7 And TcpO2 \> 30mmHg OR skin perfusion \> 30mmHG OR Toe pressure \> 30mmHg OR Duplex with biphasic waveforms below the knee
* No planned revascularization procedure or vascular surgery within the last/next 30 days
* Subject and/or caregiver are willing and able to comply with all specified care and visit requirements
* Subject has a reasonable expectation of completing the study; according to the Investigator's clinical judgment

Exclusion Criteria:

* Evidence of gangrene on any part of affected limb
* Documented evidence of osteomyelitis on any part of affected limb
* Index ulcer has exposed bone
* Index ulcer exhibits signs of severe clinical infection that requires hospitalization or immediate surgical intervention
* Active Charcot foot on the study limb
* Subject participated in another investigational device, drug or biological trial within last 30 days
* Uncontrolled diabetes: HbA1c \> 12 %
* Renal dialysis or creatinine \> 2.5
* Known immune insufficiency
* Chronic steroid use or immunosuppressive agents within the last three (3) months or is anticipated to require them during the course of the study
* Active treatment for malignancy (not specific to study limb)
* Patient has a Deep Vein Thrombosis within the last 30 days
* Subject has received growth factor therapy (e.g., autologous platelet-rich plasma gel, becaplermin, bilayered cell therapy, dermal substitute, extracellular matrix) within the screening period
* Subject may not be pregnant at the time of treatment

Primary outcomes:
measure: Wound Closure Within 12 Weeks With the Use of Topical Wound Oxygen Therapy (TWO2)
timeFrame: 12 weeks
Secondary outcomes:
measure: Absolute Change in Ulcer Area
timeFrame: 12 weeks
measure: Ulcer Recurrence
timeFrame: 12 months
measure: Number of Amputation Events
timeFrame: 12 weeks
measure: Incidence of Adverse Events
timeFrame: 54 weeks
measure: Quality of Life Assessment
timeFrame: 12 weeks
measure: Economic Analysis
timeFrame: 12 weeks
measure: Time to Complete Wound Closure in Weeks
timeFrame: 12 weeks or wound closure
Other outcomes:
Locations:
city: Phoenix
country: United States
facility: Carl T. Hayden VA Medical Center
state: Arizona
city: Vacaville
country: United States
facility: NorthBay Center for Wounds
state: California
city: Washington
country: United States
facility: Washington DC VA Medical Center
state: District of Columbia
city: Hialeah
country: United States
facility: The Research Center Inc.
state: Florida
city: Miami
country: United States
facility: Advanced Research Institute of Miami
state: Florida
city: Miami
country: United States
facility: Advanced Research Institute of Miami
state: Florida
city: Chicago
country: United States
facility: Edward Hines, Jr. VA Hospital
state: Illinois
city: Las Vegas
country: United States
facility: Advanced Foot & Ankle Center
state: Nevada
city: Richmond
country: United States
facility: Hunter Holmes McGuire VA Medical Center
state: Virginia
city: Salem
country: United States
facility: Salem VA Medical Center
state: Virginia
city: Bobigny
country: France
facility: Avicenne Hospital
city: Eaubonne
country: France
facility: Hospital Simone Veil
city: Montpellier
country: France
facility: Montpellier University Hospital
city: Dessau
country: Germany
facility: Städtisches Klinikum Dessau
city: Luxembourg
country: Luxembourg
facility: Kirchberg Hospital
city: Harrow
country: United Kingdom
facility: Northwick Park Hospital
city: London
country: United Kingdom
facility: King's College Hospital
Study officials:
affiliation: Carl T. Hayden VA Medical Center
name: Robert G Frykberg, DPM
role: PRINCIPAL_INVESTIGATOR
References:
citation: Frykberg RG, Franks PJ, Edmonds M, Brantley JN, Teot L, Wild T, Garoufalis MG, Lee AM, Thompson JA, Reach G, Dove CR, Lachgar K, Grotemeyer D, Renton SC; TWO2 Study Group. A Multinational, Multicenter, Randomized, Double-Blinded, Placebo-Controlled Trial to Evaluate the Efficacy of Cyclical Topical Wound Oxygen (TWO2) Therapy in the Treatment of Chronic Diabetic Foot Ulcers: The TWO2 Study. Diabetes Care. 2020 Mar;43(3):616-624. doi: 10.2337/dc19-0476. Epub 2019 Oct 16.