Neuromuscular Electrical Stimulation (NMES) for Improving Outcomes Following Total Knee Arthroplasty (TKA)

Neuromuscular Electrical Stimulation (NMES) for Improving Outcomes Following Total Knee Arthroplasty (TKA)

Prospective Evaluation of Neuromuscular Electrical Stimulation (NMES) for Improving Outcomes Following Total Knee Arthroplasty (TKA)

The current standard for rehabilitation after TKA consists of guided exercise therapy for up to 12 weeks after surgery. This includes inpatient, home, and outpatient therapy. The surgery and rehabilitation are highly successful at reducing or eliminating pain experienced preoperatively. However, quadriceps femoris muscle (QFM) strength, overall function, and knee range of motion are often worse than preoperative levels for as long as 6 months after surgery and in some cases may persist for many years after that. Such quadriceps strength impairments after TKA have been largely attributed to voluntary activation deficits and can lead to a decrease in functional performance such as decreased gait speed, decreased balance which can lead to falls, and decreased stair climbing & chair rise abilities. Since therapy alone does not adequately restore or improve upon the preoperative functional capabilities in a consistent and timely manner, it has been suggested that NMES used adjunctively with postoperative rehabilitation will alleviate the quadriceps muscle activation deficits. Early NMES use after TKA has been shown to: reduce knee extensor lag, increase walking speed, and improve QFM strength, knee range of motion, and function. However, NMES initiated one month after TKA did not lead to improved QFM strength or function beyond the standard benefits gained from exercise alone, thus suggesting that the timing of NMES application after TKA is important. It has previously been shown that preoperative QFM strength is predictive of postoperative function [6] but the benefit of prehabilitation remains in question. To date, there has only been one pilot study assessing the benefits of NMES when initiated preoperatively. This study only included 14 patients (9 NMES, 5 control) but was able to show that preoperative NMES usage may lead to greater QFM strength gains after TKA. Therefore, it will be important to assess the benefits of NMES both preoperatively and postoperatively in order to determine how it will be most beneficial to TKA patients.

The study duration will be until 12 weeks ± 1 week postoperatively. Data will be collected (1) 4 weeks preoperatively, (2) prior to hospital admission for TKA, and (3) at 3, 6, and 12 weeks postoperatively. The research coordinator at the site will identify, recruit, and prospectively follow the 66 patients at his/her site. All data will be entered and maintained in REDCap, an electronic data capture tools hosted at Cleveland Clinic. REDCap (Research Electronic Data Capture) is a secure, web-based application designed to support data capture for research studies, providing 1) an intuitive interface for validated data entry; 2) audit trails for tracking data manipulation and export procedures; 3) automated export procedures for seamless data downloads to common statistical packages; and 4) procedures for importing data from external sources. Only members of the study team (i.e. the personnel listed on the institutional review board (IRB) application) will have access to protected health information of patients included in this study. Pretreatment Assessments Before treatment, the following assessments/tests will be performed and the results will be recorded on the appropriate pages of the (case report form) CRF, and or Microsoft excel, Microsoft Word, and REDCap: Informed consent Age, gender, height/weight/(body mass index) BMI Concomitant diseases Physical examination Baseline range of motion of affected knee Baseline timed up and go test (TUG test, detailed in Appendix A and as described by Podsiadlo et al.) Baseline Stair Climb test Baseline QFM strength Baseline Modified Knee Injury and Osteoarthritis Outcome Score (KOOS) and Veterans Rand 12(VR-12) assessments Baseline VAS (visual analog scale)pain score Current medications Any use of ambulation assist device Presurgery Assessments Before surgery, the following assessments/tests will be performed and the results will be recorded on the appropriate pages of the CRF, and or Microsoft excel, Microsoft Word, and REDCap: Device usage patterns (thru app for preop NMES group) Range of motion of affected knee TUG test Stair Climb test QFM strength Modified KOOS and VR-12 assessments VAS pain score Current medications Activity levels using Misfit Wearables® fitness monitor will be uploaded and incorporated into online app Operative Assessments The following will be collected from the Operative and Anesthesia Records and recorded on the appropriate pages of the CRF, and or Microsoft excel, Microsoft Word, and REDCap: Surgeon name Approach used Randomization assignment Diagnosis Length of surgery Estimated blood loss Type of anesthesia Implant type Postoperative Assessments After surgery, one or more of the following will be collected through the online app and at follow-up visits. Device usage patterns (thru app) Range of motion of affected knee (thru app and at follow-up) TUG test Stair Climb test QFM strength Modified KOOS and VR-12 assessments VAS pain score Length of stay (hospital, extended care facility) 90 day readmission rate Discharge Disposition (home vs skilled nursing facility vs inpatient rehabilitation) Patient Satisfaction measures Any use of an ambulation assist aid Activity levels using Misfit Wearables® fitness monitor will be uploaded and incorporated into online app As a last resort, if a patient is unable to keep one of these appointments, he/she will be either be mailed or emailed the patient reported outcome forms so the patient can fill them out. The patient will date and time the forms. Participants will then send the form back in a pre-addressed envelope. The patients email will be verified by the patient during a clinical visit to ensure accuracy of the correct recipient. Patients not responding to the initial mailer will be contacted by phone and forms may be administered over the phone. The mailers and/or phone calls will allow us to collect all data except the physical function measures. All data will be entered and maintained in Redcap

Subject will be given NMES CyMedica Orthopedics QB1 e-vive™ system device to use preoperative and will continue to use postoperatively until end of study

Subject will be given NMES CyMedica Orthopedics QB1 e-vive™ system device to use postoperatively and will continue to use until end of study

a multifunctional electrotherapy device providing neuromuscular electrical stimulation (NMES), for improving quadriceps strength and improving functional outcomes accelerating functional recovery in patients managed with total knee arthroplasty (TKA).

Differences in VAS scores between the treatment groups from baseline to 12 weeks postop. Higher score represents worse pain.

Functional outcomes using the Knee Injury and Osteoarthritis Outcome Score (KOOS) Physical Function Shortform (PS) questionnaire. Change in total score from baseline to 12 weeks postoperative score. Minimum value is 0, maximum value is 100, and higher values mean greater improvement over baseline total score.

Measure pain at 12 weeks postoperative using Knee Injury and Osteoarthritis Outcome Score (KOOS) Pain subscore. Change in total score from baseline to 12 weeks postoperative score. Minimum value is 0, maximum value is 100, and higher values mean greater improvement over baseline total score.

Inclusion Criteria: Patients undergoing unilateral primary total knee arthroplasty Patients who are between the ages of 18 - 85 years Patient has signed informed consent Patient has access to a smartphone or tablet (Android or iOS) Exclusion Criteria: BMI ≥ 40 Inflammatory arthritis Patients who are expected to be in extended care facilities after surgery Patients who have used an at-home NMES device in the past Preoperative daily use of narcotics (i.e., high tolerance) Already enrolled in another research study, including the present study for contralateral knee Other lower-extremity orthopaedic conditions which could interfere with limb function, especially those with significant pain requiring daily analgesic intake Patients with concurrent abdominal, inguinal or femoral hernias Cutaneous lesions in areas of electrode pad placement Patients with a history of epilepsy Patients with a cardiac pacemaker/defibrillator Allergy to adhesives Inability to meet follow-up visits required for the study Patients who are a risk for poor compliance or have a poor understanding of the use of the NMES device Condition deemed by physician or medical staff to be non-conducive to patient's ability to complete the study, or a potential risk to the patient's health and well-being

Stevens-Lapsley JE, Balter JE, Wolfe P, Eckhoff DG, Kohrt WM. Early neuromuscular electrical stimulation to improve quadriceps muscle strength after total knee arthroplasty: a randomized controlled trial. Phys Ther. 2012 Feb;92(2):210-26. doi: 10.2522/ptj.20110124. Epub 2011 Nov 17.

Levine M, McElroy K, Stakich V, Cicco J. Comparing conventional physical therapy rehabilitation with neuromuscular electrical stimulation after TKA. Orthopedics. 2013 Mar;36(3):e319-24. doi: 10.3928/01477447-20130222-20.

Gotlin RS, Hershkowitz S, Juris PM, Gonzalez EG, Scott WN, Insall JN. Electrical stimulation effect on extensor lag and length of hospital stay after total knee arthroplasty. Arch Phys Med Rehabil. 1994 Sep;75(9):957-9.

Avramidis K, Karachalios T, Popotonasios K, Sacorafas D, Papathanasiades AA, Malizos KN. Does electric stimulation of the vastus medialis muscle influence rehabilitation after total knee replacement? Orthopedics. 2011 Mar 11;34(3):175. doi: 10.3928/01477447-20110124-06.

Petterson SC, Mizner RL, Stevens JE, Raisis L, Bodenstab A, Newcomb W, Snyder-Mackler L. Improved function from progressive strengthening interventions after total knee arthroplasty: a randomized clinical trial with an imbedded prospective cohort. Arthritis Rheum. 2009 Feb 15;61(2):174-83. doi: 10.1002/art.24167.

Mizner RL, Petterson SC, Stevens JE, Axe MJ, Snyder-Mackler L. Preoperative quadriceps strength predicts functional ability one year after total knee arthroplasty. J Rheumatol. 2005 Aug;32(8):1533-9.

D'Lima DD, Colwell CW Jr, Morris BA, Hardwick ME, Kozin F. The effect of preoperative exercise on total knee replacement outcomes. Clin Orthop Relat Res. 1996 May;(326):174-82. doi: 10.1097/00003086-199605000-00020.

Villadsen A. Neuromuscular exercise prior to joint arthroplasty in patients with osteoarthritis of the hip or knee. Dan Med J. 2016 Apr;63(4):B5235. No abstract available.

Rodgers JA, Garvin KL, Walker CW, Morford D, Urban J, Bedard J. Preoperative physical therapy in primary total knee arthroplasty. J Arthroplasty. 1998 Jun;13(4):414-21. doi: 10.1016/s0883-5403(98)90007-9.

Walls RJ, McHugh G, O'Gorman DJ, Moyna NM, O'Byrne JM. Effects of preoperative neuromuscular electrical stimulation on quadriceps strength and functional recovery in total knee arthroplasty. A pilot study. BMC Musculoskelet Disord. 2010 Jun 14;11:119. doi: 10.1186/1471-2474-11-119.

Klika AK, Gehrig M, Boukis L, Milidonis MK, Smith DA, Murray TG, Barsoum WK. A Rapid Recovery Program After Total Knee Arthroplasty. Semin Arthro. 2009; 20:40-44.

Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther. 1998 Aug;28(2):88-96. doi: 10.2519/jospt.1998.28.2.88.

Brazier JE, Roberts J. The estimation of a preference-based measure of health from the SF-12. Med Care. 2004 Sep;42(9):851-9. doi: 10.1097/01.mlr.0000135827.18610.0d.

Price DD, McGrath PA, Rafii A, Buckingham B. The validation of visual analogue scales as ratio scale measures for chronic and experimental pain. Pain. 1983 Sep;17(1):45-56. doi: 10.1016/0304-3959(83)90126-4.

Podsiadlo D, Richardson S. The timed "Up & Go": a test of basic functional mobility for frail elderly persons. J Am Geriatr Soc. 1991 Feb;39(2):142-8. doi: 10.1111/j.1532-5415.1991.tb01616.x.

Harris PA, Taylor R, Thielke R, Payne J, Gonzalez N, Conde JG. Research electronic data capture (REDCap)--a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform. 2009 Apr;42(2):377-81. doi: 10.1016/j.jbi.2008.08.010. Epub 2008 Sep 30.