Early Postoperative Compex Rehab NMES Use for Total Knee Arthroplasty Patients
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|ClinicalTrials.gov Identifier: NCT01844193|
Recruitment Status : Completed
First Posted : May 1, 2013
Results First Posted : April 12, 2021
Last Update Posted : April 12, 2021
|Condition or disease||Intervention/treatment||Phase|
|Knee Osteoarthritis||Device: Compex Rehab||Not Applicable|
Neuromuscular electrical stimulation (NMES) for muscle strengthening and training has been in use since the 1970s, but questions still remain regarding its effectiveness with different patient populations, the duration of use and specifics regarding the stimulation itself, such as length and type of electrical impulse. NMES works by passing electrical impulses through the muscles to get them to contract. These impulses mimic the body's natural neural activity (action potential) to cause a contraction. The goal with NMES is to strengthen the muscle sooner by using muscle re-education. The quadriceps is weakened and sometimes slow to respond after knee surgery. A weak quadriceps muscle after surgery can be a contributing factor to dissatisfaction with the surgical result. When the quadriceps are weak or not firing properly, forces are transferred to areas such as the knee joint placing an additional strain on the replaced joint and contributing to knee pain, swelling and inflammation. If we can get patients' quads firing better and sooner, we hope we would also see better short-term and long-term functional outcomes and more long-term satisfaction than is presently reported. Study Enrollment We are looking for 60 patients to participate. We are randomly assigning 30 participants to receive the standard therapy regimen and 30 to follow the standard therapy regimen with the addition of using an NMES treatment twice a day, every day, for a ten-week period. Patients in the therapy with NMES treatment group will keep a tracking log of their use at home and will turn in the units at the 10-week appointment. The unit is easy to use and all participants are given specific instructions on its use. All participants complete baseline muscle testing before their surgery and then again at two-week, six-week, ten-week, and one-year appointments. The muscle testing consists of a battery of functional measures to assess the quadriceps such as the Timed Up and Go test (TUG), Six Minute Walk test (6MWT), Single Limb Stance (SLS) and others. All testing is conducted at Indiana Orthopaedic Hospital South's physical therapy department.
When designing this study we worked closely with the department to make sure the intended tests were appropriate both for our study and the facility; the input from the staff was and continues to be integral to this study's success. It is too early to report any findings and we are still enrolling patients. If effective, the NMES treatment should improve quadriceps activation and functioning early on after surgery, which will hopefully allow the patient to experience less pain and have a quicker functional recovery than a patient who did not use the NMES. Only time will tell if this is a logical conclusion and if NMES as a standard postoperative therapy would be beneficial for our patients. We anxiously await the outcome of the study.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||60 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Double (Participant, Outcomes Assessor)|
|Primary Purpose:||Supportive Care|
|Official Title:||A 12-Month Prospective, Post-Market Study of Early Postoperative Compex® Rehab NMES Use in Total Knee Arthroplasty Patients|
|Study Start Date :||January 2013|
|Actual Primary Completion Date :||December 31, 2016|
|Actual Study Completion Date :||December 31, 2016|
No Intervention: Standard Therapy
This arm of the study will follow the standard therapy course after total knee arthroplasty.
Experimental: Standard Therapy + NMES
This arm will follow the standard course of therapy but also incorporate daily neuromuscular electrical stimulation into the daily therapy regimen after total knee arthroplasty through use of the Compex Rehab device.
Device: Compex Rehab
Participants in this arm will use a Compex® Rehab unit for neuromuscular electrical stimulation starting with postoperative at-home day 1 and continue using the unit twice a day, every day, until a 10-week follow-up is reached. The unit produces a 380 microsecond biphasic curve and utilizes a four phase process for the treatment ("Warm-up", "Work", "Relaxation", and "Recovery") for a total treatment time of 20 minutes and 5 seconds per session. All frequencies are delivered at the maximum subjective tolerable intensity. Participants will control this intensity and be asked to select a level that is tolerable although mildly uncomfortable; they will be instructed to increase this intensity as tolerated.
- Change in Quadriceps Force [ Time Frame: Baseline and 1-year Follow-up ]Change in quadriceps force is the difference between average quadriceps force measurements (in Newtons) obtained at the 1-year postoperative follow-up minus the average quadriceps force measurement at baseline. Averages are stratified by study arm. Negative values indicate a reduction in quadriceps force from baseline measurement to 1-year.
- Change in VAS Pain Scores [ Time Frame: Baseline and 1-year Follow-up ]Average Visual Analog Scale (VAS) pain scores were computed for baseline and 1-year visits for each study arm. This measure is the difference between the average pain score at the baseline and 1-year follow-ups (1-year minus Baseline), stratified by study arm. The scale ranges from 0 to 10, with 0 being "No Pain" and 10 being " Pain as bad as it could possibly be." Lower scores indicate lower levels of reported pain. Negative scores indicate a reduction in pain from baseline to 1-year.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01844193
|United States, Indiana|
|Greenwood, Indiana, United States, 46143|
|Principal Investigator:||Frank R Kolisek, MD||OrthoIndy South|