Journal of Rehabilitation Research & Development (JRRD)

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Volume 50 Number 5, 2013
   Pages 619 — 634

Abstract — Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis—A pilot study

Laurent Frossard, PhD;1–2* Eva Häggström, CPO;3–4 Kerstin Hagberg, PhD;3–5 Rickard Brånemark, MD, PhD4–5

1Group of Research on Adapted Physical Activities, Université du Québec à Montréal, Montréal, Canada; 2Marie Enfant Rehabilitation Centre of CHU Sainte-Justine, Montréal, Canada; 3Department of Prosthetics and Orthotics, Sahlgrenska University Hospital, Gothenburg, Sweden; 4Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; 5Centre of Orthopaedic Osseointegration, Sahlgrenska University Hospital, Gothenburg, Sweden

Abstract — The objectives of this study were to (1) record the inner-prosthesis loading during activities of daily living (ADLs), (2) present a set of variables comparing loading data, and (3) provide an example of characterization of two prostheses. The load was measured at 200 Hz using a multi-axial transducer mounted between the residuum and the knee of an individual with unilateral transfemoral amputation fitted with a bone-anchored prosthesis. The load was measured while using two different prosthetic knees, mechanical (PRO1) and microprocessor-controlled (PRO2), during six ADLs. The characteri-zation of the prostheses was achieved using a set of variables split into four categories, including temporal characteristics, maximum loading, loading slopes, and impulse. Approximately 360 gait cycles were analyzed for each prosthesis. PRO1 showed a cadence improved by 19% and 7%, a maximum force on the long axis reduced by 11% and 19%, and an impulse reduced by 32% and 15% during descent of incline and stairs compared with PRO2, respectively. This work confirmed that the proposed apparatus and characterization can reveal how changes of prosthetic components are translated into inner-prosthetic loading.

Key words: activity of daily living, artificial limb, bone-anchorage, gait, impulse, loading, osseointegration, prosthetic knee unit, temporal characteristics, transfemoral amputation.

View HTML  ¦  View PDF  ¦  Contents Vol. 50, No. 5
This article and all supplementary material should be cited as follows:
Frossard L, Häggström E, Hagberg K, Brånemark R. Load applied on bone-anchored transfemoral prosthesis: Characterization of a prosthesis—A pilot study. J Rehabil Res Dev. 2013;50(5):619–34.
ResearcherID/ORCID: Laurent Frossard, PhD: C-3582-2008

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