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An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses

The objective of this research was to assess the performance of an embedded sensing system designed to measure the distance between a prosthetic socket wall and residual limb. Low-profile inductive sensors were laminated into prosthetic sockets and flexible ferromagnetic targets were created from el...

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Autores principales: Henrikson, Katrina M., Weathersby, Ethan J., Larsen, Brian G., Cagle, John C., McLean, Jake B., Sanders, Joan E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6263676/
https://www.ncbi.nlm.nih.gov/pubmed/30423932
http://dx.doi.org/10.3390/s18113840
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author Henrikson, Katrina M.
Weathersby, Ethan J.
Larsen, Brian G.
Cagle, John C.
McLean, Jake B.
Sanders, Joan E.
author_facet Henrikson, Katrina M.
Weathersby, Ethan J.
Larsen, Brian G.
Cagle, John C.
McLean, Jake B.
Sanders, Joan E.
author_sort Henrikson, Katrina M.
collection PubMed
description The objective of this research was to assess the performance of an embedded sensing system designed to measure the distance between a prosthetic socket wall and residual limb. Low-profile inductive sensors were laminated into prosthetic sockets and flexible ferromagnetic targets were created from elastomeric liners with embedded iron particles for four participants with transtibial amputation. Using insights from sensor performance testing, a novel calibration procedure was developed to quickly and accurately calibrate the multiple embedded sensors. The sensing system was evaluated through laboratory tests in which participants wore sock combinations with three distinct thicknesses and conducted a series of activities including standing, walking, and sitting. When a thicker sock was worn, the limb typically moved further away from the socket and peak-to-peak displacements decreased. However, sensors did not measure equivalent distances or displacements for a given sock combination, which provided information regarding the fit of the socket and how a sock change intervention influenced socket fit. Monitoring of limb–socket displacements may serve as a valuable tool for researchers and clinicians to quantitatively assess socket fit.
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spelling pubmed-62636762018-12-12 An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses Henrikson, Katrina M. Weathersby, Ethan J. Larsen, Brian G. Cagle, John C. McLean, Jake B. Sanders, Joan E. Sensors (Basel) Article The objective of this research was to assess the performance of an embedded sensing system designed to measure the distance between a prosthetic socket wall and residual limb. Low-profile inductive sensors were laminated into prosthetic sockets and flexible ferromagnetic targets were created from elastomeric liners with embedded iron particles for four participants with transtibial amputation. Using insights from sensor performance testing, a novel calibration procedure was developed to quickly and accurately calibrate the multiple embedded sensors. The sensing system was evaluated through laboratory tests in which participants wore sock combinations with three distinct thicknesses and conducted a series of activities including standing, walking, and sitting. When a thicker sock was worn, the limb typically moved further away from the socket and peak-to-peak displacements decreased. However, sensors did not measure equivalent distances or displacements for a given sock combination, which provided information regarding the fit of the socket and how a sock change intervention influenced socket fit. Monitoring of limb–socket displacements may serve as a valuable tool for researchers and clinicians to quantitatively assess socket fit. MDPI 2018-11-09 /pmc/articles/PMC6263676/ /pubmed/30423932 http://dx.doi.org/10.3390/s18113840 Text en © 2018 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Henrikson, Katrina M.
Weathersby, Ethan J.
Larsen, Brian G.
Cagle, John C.
McLean, Jake B.
Sanders, Joan E.
An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title_full An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title_fullStr An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title_full_unstemmed An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title_short An Inductive Sensing System to Measure In-Socket Residual Limb Displacements for People Using Lower-Limb Prostheses
title_sort inductive sensing system to measure in-socket residual limb displacements for people using lower-limb prostheses
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6263676/
https://www.ncbi.nlm.nih.gov/pubmed/30423932
http://dx.doi.org/10.3390/s18113840
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