Knee Connect: Measuring Range of Motion and Gait Metrics After Total Knee Arthroplasty
Knee Connect: Measuring Range of Motion and Gait Metrics After Total Knee Arthroplasty
The main goals of total knee replacement (TKR) surgery are to relieve pain and to allow
 patients to remain active. Sunnybrook is working with Kineris Inc.to advance a wearable
 device, the Knee Connect, aimed at tracking the physical recovery of patients after total
 knee replacements. After surgery, patients experience a gradual progression in function as
 their knee range of motion (ROM) increases and their gait patterns normalize. Goals for these
 metrics are well documented after the patient is fully recovered. However, there is a lack of
 detailed information available about the week by week improvements patients make in these
 metrics. The main objective of this study is to determine the accuracy of the Knee Connect
 device in quantifying the weekly improvements in ROM and gait parameters of patients
 recovering from surgery.
A research assistant will conduct in person data collections on 36 patients using the Kineris
 wearable device. The device is an electronic goniometer connected to a smart phone
 application. Patients will be recruited from the "Patient Orientation Program" (POP) at the
 Sunnybrook Holland Centre. Data collection will occur preoperatively, at the end of each
 physiotherapy Knee Class session, and at the three month postoperative clinic visit. The
 research assistant will help fit and attach the wearable device to each patient's knee.
 Patients will be asked to bend their knee (flexion and extension) while wearing the device
 which will measure patients range of motion. The research assistant will also measure knee
 range of motion using a handheld protractor. Afterward, patients will be asked to walk 10
 steps, using any walking aids or techniques they typically use at home. There will be 15
 collections per patient requiring ten minutes per session. Chart reviews will also be
 conducted to determine patient reported outcomes which will be then correlated with the
 functional measures.

 All data will be extracted and input into an excel file. For both the ROM tests, the accuracy
 of the Knee Connect device will be compared against the plastic goniometer. This will be done
 by using a paired t-test and calculating interclass correlation coefficient. The data will
 then be analyzed using a repeated measures ANOVA and Bonferroni post-hoc analysis to
 determine differences in the variables week to week. Additionally, a regression analysis will
 be used to estimate the week by week improvements in these variables.
Inclusion Criteria:

 -  Be currently on the waiting list for a primary TKR

 -  Be enrolled for the "Knee Class" postoperative physiotherapy at the Sunnybrook Holland
 Centre with the expectation of attending the class through the duration of the class.

 -  Be able to provide informed consent.

 Exclusion Criteria:

 -  Revision total knee arthroplasty

 -  Neuromuscular disorder

 -  Bilateral TKR procedures