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Completed

NCT Number: NCT07779122

Wearable Electrogoniometry-Based Telerehabilitation After Total Knee Arthroplasty

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.

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Key information

Conditions

TKA Arthritis Joint Diseases Knee Osteoarthritis Musculoskeletal Diseases Osteoarthritis Osteoarthritis, Knee Rheumatic Diseases

Age range

60 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Hospital Clinico Universidad de Chile

Santiago, Santiago Metropolitan, santiago, Chile

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

Wearable Electrogoniometry-Based Telerehabilitation System

Device

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.

Other names: RebK

Standard Home-Based Rehabilitation Program

Behavioral

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

Primary outcomes

  1. Active Knee Flexion Range of Motion

    Time frame: 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.

  2. Passive Knee Flexion Range of Motion

    Time frame: 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.

  3. Active Knee Extension Range of Motion

    Time frame: 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.

  4. Passive Knee Extension

    Time frame: 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 outcomes

  1. 30-Second Sit-to-Stand Test

    Time frame: 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.

  2. Usability of the Technology-Assisted Rehabilitation System

    Time frame: 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.

Sponsors and collaborators

Lead sponsor

University of Chile

Other

Registry information

Official study title

Sistema de telerrehabilitación Guiado Por electrogoniometría, lúdico y de Bajo Costo, Para la recuperación Funcional Posterior a Una Artroplastia de Rodilla en Personas Mayores

Important dates

Study start
2022
Primary completion
2024
Study completion
2024
First posted
Aug 21, 2026
Registry last updated
Aug 21, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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