Journal
MEDICAL ENGINEERING & PHYSICS
Volume 51, Issue -, Pages 111-118Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.medengphy.2017.11.006
Keywords
Lower-limb amputee; Prosthetic socket; Residual limb; Socket fit; CAD/CAM; Interfacial sensors
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Funding
- US Army Medical Research Acquisition Activity (USAMRAA) [W81XWH-16-C-0020]
- Institute of Child Health and Human Development of the National Institutes of Health [R01HD069387]
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The objective of this research was to investigate a strategy for designing and fabricating computer manufactured socket inserts that were embedded with sensors for field monitoring of limb-socket interactions of prosthetic users. An instrumented insert was fabricated for a single trans-tibial prosthesis user that contained three sensor types (proximity sensor, force sensing resistor, and inductive sensor), and the system was evaluated through a sequence of laboratory clinical tests and two days of field use. During in-lab tests 3 proximity sensors accurately distinguish between don and doff states; 3 of 4 force sensing resistors measured gradual pressure increases as weight-bearing increased; and the inductive sensor indicated that as prosthetic socks were added the limb moved farther out of the socket and pistoning amplitude decreased. Multiple sensor types were necessary in analysis of field collected data to interpret how sock changes affected limb-socket interactions. Instrumented socket inserts, with sensors selected to match clinical questions of interest, have the potential to provide important insights to improve patient care. (C) 2017 IPEM. Published by Elsevier Ltd. All rights reserved.
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