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Load on osseointegrated fixation of a transfemoral amputee during a fall : loading, descent, impact and recovery analysis

Frossard, Laurent, Tranberg, Roy, Haggstrom, Eva, Pearcy, Mark J., & Brånemark, Rickard (2010) Load on osseointegrated fixation of a transfemoral amputee during a fall : loading, descent, impact and recovery analysis. Prosthetics and Orthotics International, 34(1), pp. 85-97.

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Abstract

Falling represents a health risk for lower limb amputees fitted with an osseointegrated fixation mainly because of the potential damage to the fixation. The purpose of this study was to characterise a real forward fall that occurred inadvertently to a transfemoral amputee fitted with an osseointegrated fixation while attending a gait measurement session to assess the load applied on the residuum. The objective was to analyse the load applied on the fixation with an emphasis on the sequence of events, the pattern and the magnitude of the forces and moments. The load was measured directly at 200 Hz using a six-channel transducer. Complementary video footage was also studied. The fall was divided into four phases: loading (240 ms), descent (620 ms), impact (365 ms) and recovery (2495 ms). The main impact forces and moments occurred 870 ms and 915 ms after the heel contact, and corresponded to 133 %BW and 17 %BWm, or 1.2 and 11.2 times the maximum forces and moments applied during the previous steps of the participant, respectively. This study provided key information to engineers and clinicians facing the challenge to design equipment, and rehabilitation and exercise programs to restore safely the locomotion of lower limb amputees.

Impact and interest:

20 citations in Scopus
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18 citations in Web of Science®

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152 since deposited on 15 Mar 2010
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ID Code: 31306
Item Type: Journal Article
Keywords: Gait, biomechanics, lower limb amputation, transfemoral amputation, forward fall, impact, loading
DOI: 10.3109/03093640903585024
ISSN: 0309-3646
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Rehabilitation Engineering (090305)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomedical Instrumentation (090303)
Divisions: Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2010 Please consult the authors.
Deposited On: 15 Mar 2010 12:31
Last Modified: 01 Mar 2012 00:16

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