Kinetics of lower limb prosthesis: automated detection of vertical loading rate

Frossard, Laurent, Jones, Michael W.M., Stewart, Ian, Leggat, Peter A., Schuetz, Michael, and Langton, Christian (2019) Kinetics of lower limb prosthesis: automated detection of vertical loading rate. Prosthesis, 1 (1). pp. 16-28.

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Vertical loading rate could be associated with residuum and whole body injuries affecting individuals fitted with transtibial prostheses. The objective of this study was to outline one out of five automated methods of extraction of vertical loading rate that stacked up the best against manual detection, which is considered the gold standard during pseudo-prosthetic gait. The load applied on the long axis of the leg of three males was recorded using a transducer fitted between a prosthetic foot and physiotherapy boot while walking on a treadmill for circa 30 min. The automated method of extraction of vertical loading rate, combining the lowest absolute average and range of 95% CI difference compared to the manual method, was deemed the most accurate and precise. The average slope of the loading rate detected manually over 150 strides was 5.56 ± 1.33 kN/s, while the other slopes ranged from 4.43 ± 0.98 kN/s to 6.52 ± 1.64 kN/s depending on the automated detection method. An original method proposed here, relying on progressive loading gradient-based automated extraction, produced the closest results (6%) to manual selection. This work contributes to continuous efforts made by providers of prosthetic and rehabilitation care to generate evidence informing reflective clinical decision-making.

Item ID: 60760
Item Type: Article (Research - C1)
ISSN: 2673-1592
Keywords: amputation; activity of daily living; detection algorithm; dynamics; force; gait; loading rate; load cell; transducer
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Copyright Information: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Funders: Assistant Secretary of Defense for Health Affairs Office
Projects and Grants: Orthotics and Prosthetics Outcomes Research Program—Prosthetics Outcomes Research Award No. W81XWH-16-1-0475
Date Deposited: 30 Oct 2019 01:18
FoR Codes: 42 HEALTH SCIENCES > 4201 Allied health and rehabilitation science > 420108 Prosthetics and orthotics @ 50%
40 ENGINEERING > 4003 Biomedical engineering > 400308 Medical devices @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970111 Expanding Knowledge in the Medical and Health Sciences @ 50%
92 HEALTH > 9299 Other Health > 929999 Health not elsewhere classified @ 50%
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