Blood Flow Restriction to Improve Muscle Strength After ACL Injury
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT03141801 |
Recruitment Status :
Completed
First Posted : May 5, 2017
Last Update Posted : January 23, 2019
|
Tracking Information | |||||
---|---|---|---|---|---|
First Submitted Date ICMJE | April 17, 2017 | ||||
First Posted Date ICMJE | May 5, 2017 | ||||
Last Update Posted Date | January 23, 2019 | ||||
Actual Study Start Date ICMJE | August 25, 2016 | ||||
Actual Primary Completion Date | November 21, 2018 (Final data collection date for primary outcome measure) | ||||
Current Primary Outcome Measures ICMJE |
Change from baseline to return to activity in quadriceps muscle strength [ Time Frame: Pre-surgery (baseline), Return to Activity (~9 months post-surgery) ] concentric isokinetic muscle strength at 60 degrees per second
|
||||
Original Primary Outcome Measures ICMJE | Same as current | ||||
Change History | |||||
Current Secondary Outcome Measures ICMJE |
|
||||
Original Secondary Outcome Measures ICMJE | Same as current | ||||
Current Other Pre-specified Outcome Measures |
|
||||
Original Other Pre-specified Outcome Measures | Same as current | ||||
Descriptive Information | |||||
Brief Title ICMJE | Blood Flow Restriction to Improve Muscle Strength After ACL Injury | ||||
Official Title ICMJE | Blood Flow Restriction Training to Improve Muscle Strength and Function Following Anterior Cruciate Ligament Injury | ||||
Brief Summary | Quadriceps muscle weakness is a common consequence following anterior cruciate ligament (ACL) injury and reconstruction. Maximizing quadriceps strength following ACL injury is significant as diminished quadriceps strength has been linked to the osteoarthritis that affects over 50% of surgically reconstructed limbs. Given that knee joint health following ACL injury is predicated on restoring quadriceps strength, identifying treatment approaches capable of improving strength is paramount. Blood flow restriction training (BFRT) is a method where oxygen to the muscle is intentionally reduced during exercise/rehabilitation and may lead to more timely and substantial strength gains. In the proposed project, we will examine the efficacy of BFRT in patients who have undergone ACL reconstruction and suffer from substantial quadriceps weakness. | ||||
Detailed Description | Quadriceps muscle weakness is a common consequence following anterior cruciate ligament (ACL) injury and reconstruction. Maximizing quadriceps strength following ACL injury is significant as diminished quadriceps strength has been linked to the osteoarthritis that affects over 50% of surgically reconstructed limbs. Given that knee joint health following ACL injury is predicated on restoring quadriceps strength, identifying treatment approaches capable of improving strength is paramount. Blood flow restriction training (BFRT) is a method whereby oxygen to the muscle is intentionally reduced during exercise/rehabilitation and may lead to more timely and substantial strength gains. In the proposed project, we will examine the efficacy of BFRT in patients who have undergone ACL reconstruction and suffer from quadriceps weakness. This project will have a randomized clinical trial design. Sixty patients that have torn their ACL and plan to undergo surgical reconstruction will be randomized into one of four groups: 1) eccentric exercise; 2) concentric exercise; 3) eccentric exercise with blood flow restriction; or 4) concentric exercise with blood flow restriction. All patients regardless of randomization assignment will also receive standard of care ACL rehabilitation. Approximately 6 weeks after ACL reconstruction surgery, patients will begin to receive the study interventions which will last for 8 weeks. The concentric exercise will be a leg press exercise done on a conventional leg press machine, while the eccentric exercise will be a leg press exercise done on a device designed to elicit eccentric muscle contractions. Patients will train at 70% of their 1 repetition maximum and will complete 4 sets of 10 contractions at each session (2 sessions/week). For patients randomized to the BFRT groups they will complete the leg press exercise while blood flow the the quadriceps muscle is restricted with a BFRT device (Delfi Personalized Tourniquet System for Blood Flow Restriction). We will quantify our dependent variables prior to surgical reconstruction, 6 weeks post-operatively (before study intervention starts), 14 weeks post-operatively (immediately after study intervention ends), and time of physician discharge from rehabilitation (e.g. time medical clearance for return to activity). The primary outcome is isokinetic quadriceps strength. We hypothesize that patients who complete eccentric exercise along with blood flow restriction training will realize the greatest gains in muscle strength. The DELFI PTS Personalized Tourniquet system is exempt from premarket notification and is therefore not subject to 510(k) |
||||
Study Type ICMJE | Interventional | ||||
Study Phase ICMJE | Not Applicable | ||||
Study Design ICMJE | Allocation: Randomized Intervention Model: Parallel Assignment Masking: None (Open Label) Primary Purpose: Treatment |
||||
Condition ICMJE | Anterior Cruciate Ligament Injury | ||||
Intervention ICMJE |
|
||||
Study Arms ICMJE |
|
||||
Publications * | Curran MT, Bedi A, Mendias CL, Wojtys EM, Kujawa MV, Palmieri-Smith RM. Blood Flow Restriction Training Applied With High-Intensity Exercise Does Not Improve Quadriceps Muscle Function After Anterior Cruciate Ligament Reconstruction: A Randomized Controlled Trial. Am J Sports Med. 2020 Mar;48(4):825-837. doi: 10.1177/0363546520904008. | ||||
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline. |
|||||
Recruitment Information | |||||
Recruitment Status ICMJE | Completed | ||||
Actual Enrollment ICMJE |
48 | ||||
Original Estimated Enrollment ICMJE |
60 | ||||
Actual Study Completion Date ICMJE | November 21, 2018 | ||||
Actual Primary Completion Date | November 21, 2018 (Final data collection date for primary outcome measure) | ||||
Eligibility Criteria ICMJE | Inclusion Criteria:
6) English-speaking Exclusion Criteria:
|
||||
Sex/Gender ICMJE |
|
||||
Ages ICMJE | 14 Years to 30 Years (Child, Adult) | ||||
Accepts Healthy Volunteers ICMJE | No | ||||
Contacts ICMJE | Contact information is only displayed when the study is recruiting subjects | ||||
Listed Location Countries ICMJE | United States | ||||
Removed Location Countries | |||||
Administrative Information | |||||
NCT Number ICMJE | NCT03141801 | ||||
Other Study ID Numbers ICMJE | HUM00110455 | ||||
Has Data Monitoring Committee | No | ||||
U.S. FDA-regulated Product |
|
||||
IPD Sharing Statement ICMJE |
|
||||
Current Responsible Party | Riann Palmieri-Smith, University of Michigan | ||||
Original Responsible Party | Same as current | ||||
Current Study Sponsor ICMJE | University of Michigan | ||||
Original Study Sponsor ICMJE | Same as current | ||||
Collaborators ICMJE | Not Provided | ||||
Investigators ICMJE | Not Provided | ||||
PRS Account | University of Michigan | ||||
Verification Date | January 2019 | ||||
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP |