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Physical performance and self-report outcomes associated with use of passive, adaptive, and active prosthetic knees in persons with unilateral, transfemoral amputation: Randomized crossover trial.
- Source :
- Journal of Rehabilitation Research & Development; 2015, Vol. 52 Issue 6, p677-699, 23p, 1 Black and White Photograph, 1 Diagram, 5 Charts
- Publication Year :
- 2015
-
Abstract
- Prosthetic knees are a vital component in an artificial limb. Contemporary knees include passive (mechanical), adaptive (computerized), or active (motorized) control systems and have the potential to mitigate amputation-related functional impairments and activity limitations. A 14 mo randomized crossover trial was conducted. Participants (n = 12, mean age = 58 yr) were tested under three conditions: passive control (existing knee), adaptive control (Ossur Rheo Knee II), and active control (Ossur Power Knee II). Training and acclimation time were provided to participants in the adaptive and active knees. Outcome measures included indoor tests (Timed Up and Go test [TUG], stairs, and ramp), outdoor tests (walking course and perceived exertion), step activity monitor, self-report surveys (mobility, balance confidence, physical function, fatigue, and general health), and fall incidence. Mixed-effects linear regression modeling was used to evaluate data. Compared with passive control, adaptive control significantly improved comfortable TUG time (difference = 0.91 s, p = 0.001) and reported physical function (difference = 1.26 [T-score], p = 0.03). Active control significantly increased comfortable TUG, fast TUG, and ramp times (difference = 3.02, 2.66, and 0.96 s, respectively, all p < 0.03) and increased balance confidence (difference = 3.77, p = 0.003) compared with passive control. Findings suggest that adaptive knee control may enhance function compared with passive control but that active control can restrict mobility in middle-age or older users with transfemoral amputation. [ABSTRACT FROM AUTHOR]
- Subjects :
- AMPUTEES
ARTIFICIAL limbs
BIOMECHANICS
CONFIDENCE
CROSSOVER trials
POSTURAL balance
EXERCISE
ACCIDENTAL falls
FATIGUE (Physiology)
HEALTH status indicators
KNEE
LEG amputation
LIFE skills
LONGITUDINAL method
EVALUATION of medical care
PSYCHOLOGY of movement
HEALTH outcome assessment
PROBABILITY theory
PROSTHETICS
QUESTIONNAIRES
REGRESSION analysis
RESEARCH funding
SCALE analysis (Psychology)
SELF-evaluation
STATISTICS
WALKING
DATA analysis
SOCIOECONOMIC factors
BODY movement
RANDOMIZED controlled trials
VISUAL analog scale
STAIR climbing
DATA analysis software
FUNCTIONAL assessment
DESCRIPTIVE statistics
REHABILITATION
Subjects
Details
- Language :
- English
- ISSN :
- 07487711
- Volume :
- 52
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Rehabilitation Research & Development
- Publication Type :
- Academic Journal
- Accession number :
- 123799581
- Full Text :
- https://doi.org/10.1682/JRRD.2014.09.0210