Knee Osteoarthritis, TKA
Conditions
Keywords
Telerehabilitation, Electrogoniometry, Wearable Technology, Total Knee Arthroplasty, Postoperative Rehabilitation, Range of Motion
Brief summary
This study evaluated a wearable electrogoniometry-based telerehabilitation system designed to support recovery after total knee arthroplasty. Participants followed a home-based rehabilitation program, while patients in the intervention group additionally used a wearable knee device connected to a digital application that provided exercise guidance, real-time feedback, and remote monitoring. Knee range of motion, functional performance, and patient-reported outcomes were evaluated during postoperative recovery.
Detailed description
Participants were allocated sequentially in a non-randomized manner. The first 50 enrolled participants constituted the control group, and the subsequent 32 participants were allocated to the intervention group and received the wearable electrogoniometry-based telerehabilitation system. All participants underwent a preoperative baseline assessment. Following total knee arthroplasty, participants were followed weekly during the first 8 postoperative weeks, with a final assessment at 12 weeks. Clinical and functional outcomes included knee range of motion, functional performance, and self-reported assessments. Participants in the intervention group additionally completed a questionnaire evaluating the usability of and their experience with the technology-assisted rehabilitation system.
Interventions
DEVICEWearable Electrogoniometry-Based Telerehabilitation System
Participants performed their prescribed postoperative rehabilitation exercises using the RebK wearable electrogoniometry-based telerehabilitation system. The wearable knee device was connected to a mobile application that guided exercise performance, provided real-time feedback on knee movement, and enabled remote monitoring of rehabilitation progress by the clinical team.
BEHAVIORALStandard Home-Based Rehabilitation Program
A standardized home-based exercise program following total knee arthroplasty, including therapeutic exercises aimed at improving knee range of motion, muscle strength, and functional recovery. Partici
Sponsors
University of Chile
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Intervention model description
Participants were assigned sequentially to two parallel groups in a non-randomized manner. The first 50 enrolled participants were assigned to the control group and received the standard home-based rehabilitation program. The subsequent 32 participants were assigned to the intervention group and received the same rehabilitation program supported by the wearable electrogoniometry-based telerehabilitation system.
Eligibility
Sex/Gender
ALL
Age
60 Years to No maximum
Healthy volunteers
No
Inclusion criteria
Adults older than 60 years. Scheduled for primary total knee arthroplasty for knee osteoarthritis. Able to attend weekly postoperative range-of-motion assessments.
Exclusion criteria
Revision arthroplasty. Use of constrained implants. Cognitive impairment preventing adherence to rehabilitation instructions. Inability to participate in follow-up assessments.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Active Knee Flexion Range of Motion | Preoperative baseline, weekly during postoperative weeks 1-8, and postoperative week 12 | Active knee flexion range of motion, measured in degrees using standardized goniometry. Higher values indicate greater knee flexion. |
| Passive Knee Flexion Range of Motion | Preoperative baseline, weekly during postoperative weeks 1-8, and postoperative week 12 | Passive knee flexion range of motion, measured in degrees using standardized goniometry. Higher values indicate greater knee flexion. |
| Active Knee Extension Range of Motion | Preoperative baseline, weekly during postoperative weeks 1-8, and postoperative week 12 | Active knee extension range of motion, measured in degrees using standardized goniometry. A value of 0° indicates full knee extension, while negative values indicate an extension deficit. |
| Passive Knee Extension | Preoperative baseline, weekly during postoperative weeks 1-8, and postoperative week 12 | Passive knee extension range of motion, measured in degrees using standardized goniometry. A value of 0° indicates full knee extension, while negative values indicate an extension deficit. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 30-Second Sit-to-Stand Test | Preoperative baseline, weekly during postoperative weeks 1-8, and postoperative week 12 | Functional performance assessed as the total number of complete sit-to-stand repetitions performed within 30 seconds. Higher values indicate better functional performance. |
| Usability of the Technology-Assisted Rehabilitation System | Postoperative week 12 | Usability of the wearable electrogoniometry-based telerehabilitation system assessed using a structured patient questionnaire. Items were rated on a 5-point Likert scale, with higher scores indicating more favorable usability ratings. |
Countries
Chile
Contacts
PRINCIPAL_INVESTIGATORHachi Manzur, MD
University of Chile
Outcome results
None listed