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Microprocessor prosthetic ankles: comparative biomechanical evaluation of people with transtibial traumatic amputation during standing on level ground and slope.

Article dans une revue avec comité de lecture
Author
THOMAS-POHL, Marie
314008 Hôpital d'instruction des Armées Percy
VILLA, Coralie
DAVOT, Jean-Louis
564850 Institution Nationale des Invalides - Centre d’Etudes et de Recherche sur l’Appareillage des Handicapés [INI/CERAH]
BONNET, Xavier
FACIONE, Julia
314008 Hôpital d'instruction des Armées Percy
LAPEYRE, Eric
314008 Hôpital d'instruction des Armées Percy
BASCOU, Joseph
ccPILLET, Helene
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]

URI
http://hdl.handle.net/10985/18540
DOI
10.1080/17483107.2019.1629112
Date
2019
Journal
Disability and Rehabilitation: Assistive Technology

Abstract

Background: The compensations occurrence due to the alteration of the posture and the gait of persons with lower limb amputation is still an issue in prosthetic fitting. Recently, prosthetic feet designed to reproduce the physiological behaviour of the ankle using a microprocessor control have been commer- cialized to address this issue. Objectives: Investigate the relevance of these microprocessor prosthetic ankles (MPAs) in the ability of standing on both level and inclined surfaces. Methods: Six persons with transtibial amputation usually fitted with energy storing and returning (ESR) foot tested three MPAs: ElanV R Endolite (MPA1), MeridiumV Ossur (MPA3). Each MPA data acquisition was preceded of a 2 weeks adaptation period at home and followed by a 3- weeks wash-out period with their ESR. Lower limb angular position and moment, Centre of Pressure (CoP) position, Ground Reaction Forces (GRF) and functional scores were collected in static, on level ground and 12% inclined slope. Results: MPAs allowed a better posture and a reduction of residual knee moment on positive and/or negative slope compared to ESR. Results also reflect that the MPA2 allows the best control of the CoP in all situations. Conclusions: An increased ankle mobility is associated with a better posture and balance on slope. Gait analysis would complete these outcomes. Clinical relevance: This study compares three MPAs to ESR analysing static posture. Static analysis on level ground and slope represents the challenging conditions people with amputation have to cope with in their daily life, especially outdoors. Having a better understanding of the three MPAs behaviour could help to adequately fit the prosthesis to each patient.

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