Effectiveness of Reduced Frequency Physical Therapy in Total Knee Arthroplasty

Total knee arthroplasty (TKA) is a common surgical procedure for individuals experiencing pain and reduced physical abilities related to knee pain, most commonly osteoarthritis. Common physical impairments associated with post-operative TKA rehabilitation include: reduced knee range of motion (ROM), reduced strength, reduced participation in activities of daily living, and pain. TKA surgery is routinely paired with physical therapy (PT) interventions post-operatively in order to facilitate recovery for patients electing to undergo this intervention. The Total Range Exerciser (T-REX) is a medical device aimed at reducing the need for post-operative physical therapy services while promoting outcomes.

A successful outcome after total knee arthroplasty requires symptom relief and restoration of physical function. Measurement of pain and function can be achieved through patient-reported outcomes measures and objective functional testing. The Knee Injury and Osteoarthritis Outcome Score (KOOS) is a patient-reported outcomes measure intended to capture the individual patient's perception of progress throughout the rehabilitative process. Objective measurements of physical function are necessary to quantify the magnitude of physical impairment associated with the patient's perceived status. Physical function can be measured through standardized assessment of knee ROM, strength, and ambulation. The purpose of this study is to evaluate the effectiveness of standard physical therapy compared to reduced frequency physical therapy supplemented with the (T-REX) after in total knee arthroplasty in subjective and objective measurements of physical function.

Inclusion criteria

• Individual is to undergo TKA by a licensed physician at Participating hospital group
• Participating primary health insurance provider
• Patient is < 64.5 years of age
• Willingness to participate in study protocol

Exclusion criteria

• Previous or current history of cancer
• High risk for cardiovascular disease as determined by the American College of Sports Medicine
• Individuals with documented mental, psychiatric, or emotional disabilities
• Inability to read and write in English