Evaluation of a Powered Ankle-Foot Prosthesis during Slope Ascent Gait

Christopher A Rábago; Jennifer Aldridge Whitehead; Jason M Wilken

doi:10.1371/journal.pone.0166815

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Evaluation of a Powered Ankle-Foot Prosthesis during Slope Ascent Gait

Journal article

Open access

Peer reviewed

Evaluation of a Powered Ankle-Foot Prosthesis during Slope Ascent Gait

Christopher A Rábago, Jennifer Aldridge Whitehead and Jason M Wilken

PloS one, Vol.11(12), pp.e0166815-e0166815

2016

DOI: 10.1371/journal.pone.0166815

PMCID: PMC5157979

PMID: 27977681

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Abstract

Passive prosthetic feet lack active plantarflexion and push-off power resulting in gait deviations and compensations by individuals with transtibial amputation (TTA) during slope ascent. We sought to determine the effect of active ankle plantarflexion and push-off power provided by a powered prosthetic ankle-foot (PWR) on lower extremity compensations in individuals with unilateral TTA as they walked up a slope. We hypothesized that increased ankle plantarflexion and push-off power would reduce compensations commonly observed with a passive, energy-storing-returning prosthetic ankle-foot (ESR). We compared the temporal spatial, kinematic, and kinetic measures of ten individuals with TTA (age: 30.2 ± 5.3 yrs) to matched abled-bodied (AB) individuals during 5° slope ascent. The TTA group walked with an ESR and separately with a PWR. The PWR produced significantly greater prosthetic ankle plantarflexion and push-off power generation compared to an ESR and more closely matched AB values. The PWR functioned similar to a passive ESR device when transitioning onto the prosthetic limb due to limited prosthetic dorsiflexion, which resulted in similar deviations and compensations. In contrast, when transitioning off the prosthetic limb, increased ankle plantarflexion and push-off power provided by the PWR contributed to decreased intact limb knee extensor power production, lessening demand on the intact limb knee.

Young Adult

Biomechanical Phenomena

Humans

Foot - physiology

Adult

Amputees

Female

Male

Artificial Limbs

Gait - physiology

Ankle - physiology

Walking - physiology

Details

Title: Subtitle: Evaluation of a Powered Ankle-Foot Prosthesis during Slope Ascent Gait
Creators: Christopher A Rábago - The Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, Texas, United States of America
Jennifer Aldridge Whitehead - The Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, Texas, United States of America
Jason M Wilken - The Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, Texas, United States of America
Resource Type: Journal article
Publication Details: PloS one, Vol.11(12), pp.e0166815-e0166815
DOI: 10.1371/journal.pone.0166815
PMID: 27977681
PMCID: PMC5157979
NLM abbreviation: PLoS One
ISSN: 1932-6203
eISSN: 1932-6203
Publisher: Public Library of Science; United States
Grant note: DOI: 10.13039/100006965, name: Telemedicine & Advanced Technology Research Center, award: W81K00-09-P-1129; name: DOD Defense Health Programs’ Center for Rehabilitation Sciences Research, award: NF90UG; name: Military Amputee Research Program, award: W81XWH-06-2-0073
Language: English
Date published: 2016
Academic Unit: Physical Therapy and Rehabilitation Science
Record Identifier: 9984046834402771

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