Knee Connect: Physiotherapy Exercise Performance With Visual Feedback After Total Knee Arthroplasty

Study Overview
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Brief Summary
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The main objective of this pilot study is to determine if using a portable, accelerometer based, visual feedback system improves exercise quality. The secondary objective of this study is to investigate the effect of motivational targets by testing the effects of increasing ROM targets. The results from this study will be used to improve the visual feedback system of the Knee Connect system and serve as starting point for a larger clinical study.

Detailed Description
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The research team will recruit 10 post-op total knee replacement patients who are enrolled in the Knee Class at Sunnybrook Holland Orthopaedic and Arthritic Centre to perform five exercises over two sessions. Each patient will complete five tasks. Quarter squats Standing hip flexion Standing knee flexion Sitting knee extension Sitting knee flexion The first three exercises will be performed with and without visual feedback. During standing hip flexion, standing knee flexion and quarter squat exercises, patients will first perform a set of each exercise following an instruction brochure. Patients will then repeat these exercises with the Knee Connect visual feedback system. The KneeConnect will be worn during the entire session, and will record the patient's knee angle and velocity regardless of visual feedback condition. For the next two exercises, sitting knee extension and sitting knee flexion, patients will perform the first set of exercises (3 repetitions) with visual feedback of their leg position in space but without seeing an end target. The Knee Connect will measure the knee angle during these tests. For the subsequent set, the Knee Connect system will present a visual target for the patient to achieve. This target will be 5 degrees above the patient's maximum terminal knee angle recorded without motivational targets. A third set will be completed with the knee angle target set 10 degrees above the patient's maximum. A caveat to the target modification for seated knee extensions is that target changes to hyperextension, will result in a full extension target. After each participant has completed the exercises with the KneeConnect system they will be asked to complete a short survey. The survey has been designed to assess the KneeConnect's usefulness and how much participants liked using the system. After the data collection has been completed each day, the RA will transfer the data from the smartphone to a secure computer. These files will then be extracted to measure: Knee angle during each exercise Knee angular velocity during each exercise A Leven's test will be used on all of the data to assess the equality of variance in each group. Each pair of data will be compared using a paired t-test to test the difference between with/without visual feedback and with/without motivational targets.

Official Title
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Knee Connect: Physiotherapy Exercise Performance With Visual Feedback After Total Knee Arthroplasty - Pilot Study

Conditions
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Arthroplasty, Replacement, Knee

Intervention / Treatment
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* Device: Knee Connect + Visual Feedback System


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Be enrolled in the Knee Class postoperative physiotherapy Be able to provide informed consent 3-6 weeks post-operative from primary total knee replacement surgery Exclusion Criteria: Revision total knee arthroplasty Neuromuscular disorder Knee Stiffness (knee flexion of <90 degrees during previous Knee Class session) Hip Stiffness (hip flexion of <90 degrees)
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Device Feasibility
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: TKR Patients<br>Any patient 3-6 weeks post-op from a TKR | Device: Knee Connect + Visual Feedback System<br>* A device to measure knee angle. It sends data a smartphone or tablet to be displayed as part of a visual feedback system.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Knee angle (degrees) | The difference in measured knee angle with and without visual feedback. | One set of measurements 3-6 weeks post TKR | 
| Knee velocity (degrees/s) | The difference in measured knee velocity with and without visual feedback. | One set of measurements 3-6 weeks post TKR | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Peak knee flexion and extension angle (degrees) | The weekly knee range of motion (in degrees) measured by the Knee Connect | One set of measurements 3-6 weeks post TKR | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Rehabilitation, Visual, Feedback