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Computerized biofeedback knee goniometer: acceptance and effect on exercise behavior in post-total knee arthroplasty rehabilitation. Arch Phys Med Rehabil 2004 Jun;85(6):1026-30

Date

06/05/2004

Pubmed ID

15179662

DOI

10.1016/j.apmr.2003.08.088

Scopus ID

2-s2.0-3042581979 (requires institutional sign-in at Scopus site)   18 Citations

Abstract

OBJECTIVE: To assess device accuracy, patient acceptance, and effect of a computerized biofeedback knee goniometer (CBG), on patients' compliance with active range of motion (AROM) exercises after total knee arthroplasty (TKA).

DESIGN: Two-stage study: measurement validation on asymptomatic controls and an unblinded, multiple crossover trial.

SETTING: Inpatient rehabilitation.

PARTICIPANTS: Asymptomatic controls (n=14) and post-TKA inpatients (n=11).

INTERVENTIONS: For measurement validation, CBG-angle measurements were compared with manual, clinician-obtained angles. To assess motivational effect, the CBG was worn after TKA; on alternating days, it either monitored AROM silently (no feedback) or provided audiovisual feedback about reaching preset range of motion (ROM) goals and prompted the patients to exercise when idle.

MAIN OUTCOME MEASURES: To assess accuracy, the device's readings were compared with manual measurements. Patient satisfaction was determined by a self-report questionnaire; exercise compliance was assessed by calculating activity rate and stratified interactivity intervals.

RESULTS: CBG readings reproduced clinician measurements reliably between 0 degrees and 100 degrees (eta(2)=98.5%). Auditory feedback was more helpful than visual feedback for motivating exercise. During feedback-on days, the mean total activity rate +/- standard deviation was 15.1+/-10.9 activity counts per hour, and the interactivity interval was 6.7+/-5.7 minutes. The activity rate was higher on feedback-off days-22.5+/-11.1 counts/hour (P=.11)-and the mean interactivity interval was 3.6+/-2.7 minutes (P=.07).

CONCLUSIONS: The CBG provided reliable, unbiased estimates of clinician measurements of joint angle within the range of 0 degrees to 100 degrees. The CBG was accepted well by most patients. Surprisingly, slightly more ROM activity was noted during feedback-off days than feedback-on days.

Author List

Kuiken TA, Amir H, Scheidt RA

Author

Robert Scheidt BS,MS,PhD Associate Professor in the Biomedical Engineering department at Marquette University




MESH terms used to index this publication - Major topics in bold

Analysis of Variance
Arthroplasty, Replacement, Knee
Attitude to Health
Biofeedback, Psychology
Cross-Over Studies
Exercise Therapy
Female
Humans
Knee Joint
Male
Middle Aged
Patient Compliance
Patient Satisfaction
Range of Motion, Articular
Therapy, Computer-Assisted
United States