Development of a residuum/socket interface simulator for lower limb prosthetics - ePrints Soton The University of Southampton Courses University life Research Business Global About Visit Alumni Departments News Events Contact × Search the SiteSearch Filter your search: All Courses Projects Staff University of Southampton Institutional Repository Search Advanced Search Policies & Help Latest Download Statistics Browse by Year Browse by Divisions LeftRight Development of a residuum/socket interface simulator for lower limb prosthetics Development of a residuum/socket interface simulator for lower limb prosthetics Development of a residuum/socket interface simulator for lower limb prosthetics Mechanical coupling at the interface between lower limb residua and prosthetic sockets plays an important role in assessing socket fitting and tissue health. However, most research lab–based lower limb prosthetic simulators to-date have implemented a rigid socket coupling. This study describes the fabrication and implementation of a lower limb residuum/socket interface simulator, designed to reproduce the forces and moments present during the key loading phases of amputee walking. An artificial residuum made with model bones encased in silicone was used, mimicking the compliant mechanical loading of a real residuum/socket interface. A 6-degree-of-freedom load cell measured the overall kinetics, having previously been incorporated into an amputee’s prosthesis to collect reference data. The developed simulator was compared to a setup where a rigid pylon replaced the artificial residuum. A maximum uniaxial load of 850 N was applied, comparable to the peak vertical ground reaction force component during amputee walking. Load cell outputs from both pylon and residuum setups were compared. During weight acceptance, when including the artificial residuum, compression decreased by 10%, while during push off, sagittal bending and anterior–posterior shear showed a 25% increase and 34% decrease, respectively. Such notable difference by including a compliant residuum further highlighted the need for such an interface simulator. Subsequently, the simulator was adjusted to produce key load cell outputs briefly aligning with those from amputee walking. Force sensing resistors were deployed at load bearing anatomic locations on the residuum/socket interface to measure pressures and were compared to those cited in the literature for similar locations. The development of such a novel simulator provides an objective adjunct, using commonly available mechanical test machines. It could potentially be used to provide further insight into socket design, fit and the complex load transfer mechanics at the residuum/socket interface, as well as to evaluate the structural performance of prostheses. 10.1177/0954411917690764 0954-4119 235-242 Mcgrath, Michael 32b5ce9d-eada-4edb-9c2e-ebc4d05142e9 Gao, Jianliang 84cfd2ed-c48c-4d9f-9e7c-49afc7cc6e4d Tang, Jing b4b9a22c-fd6d-427a-9ab1-51184c1d2a2c Laszczak, Piotr ea4976f2-006b-4be6-b49a-9d4a88c1a4bf Jiang, Liudi 374f2414-51f0-418f-a316-e7db0d6dc4d1 Bader, Dan 9884d4f6-2607-4d48-bf0c-62bdcc0d1dbf Moser, David 09874cab-348f-47f9-b018-1c2875d16998 Zahedi, Saeed 4a233dc6-995d-486d-becc-38e1a7d7e499 1 March 2017 Mcgrath, Michael 32b5ce9d-eada-4edb-9c2e-ebc4d05142e9 Gao, Jianliang 84cfd2ed-c48c-4d9f-9e7c-49afc7cc6e4d Tang, Jing b4b9a22c-fd6d-427a-9ab1-51184c1d2a2c Laszczak, Piotr ea4976f2-006b-4be6-b49a-9d4a88c1a4bf Jiang, Liudi 374f2414-51f0-418f-a316-e7db0d6dc4d1 Bader, Dan 9884d4f6-2607-4d48-bf0c-62bdcc0d1dbf Moser, David 09874cab-348f-47f9-b018-1c2875d16998 Zahedi, Saeed 4a233dc6-995d-486d-becc-38e1a7d7e499 Mcgrath, Michael, Gao, Jianliang, Tang, Jing, Laszczak, Piotr, Jiang, Liudi, Bader, Dan, Moser, David and Zahedi, Saeed (2017) Development of a residuum/socket interface simulator for lower limb prosthetics. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 231 (3), 235-242. (doi:10.1177/0954411917690764). Record type: Article Abstract Mechanical coupling at the interface between lower limb residua and prosthetic sockets plays an important role in assessing socket fitting and tissue health. However, most research lab–based lower limb prosthetic simulators to-date have implemented a rigid socket coupling. This study describes the fabrication and implementation of a lower limb residuum/socket interface simulator, designed to reproduce the forces and moments present during the key loading phases of amputee walking. An artificial residuum made with model bones encased in silicone was used, mimicking the compliant mechanical loading of a real residuum/socket interface. A 6-degree-of-freedom load cell measured the overall kinetics, having previously been incorporated into an amputee’s prosthesis to collect reference data. The developed simulator was compared to a setup where a rigid pylon replaced the artificial residuum. A maximum uniaxial load of 850 N was applied, comparable to the peak vertical ground reaction force component during amputee walking. Load cell outputs from both pylon and residuum setups were compared. During weight acceptance, when including the artificial residuum, compression decreased by 10%, while during push off, sagittal bending and anterior–posterior shear showed a 25% increase and 34% decrease, respectively. Such notable difference by including a compliant residuum further highlighted the need for such an interface simulator. Subsequently, the simulator was adjusted to produce key load cell outputs briefly aligning with those from amputee walking. Force sensing resistors were deployed at load bearing anatomic locations on the residuum/socket interface to measure pressures and were compared to those cited in the literature for similar locations. The development of such a novel simulator provides an objective adjunct, using commonly available mechanical test machines. It could potentially be used to provide further insight into socket design, fit and the complex load transfer mechanics at the residuum/socket interface, as well as to evaluate the structural performance of prostheses. Text Accepted_Manuscript.pdf - Accepted Manuscript Available under License University of Southampton Accepted Manuscript Licence. Download (1MB) More information Accepted/In Press date: 5 January 2017 e-pub ahead of print date: 6 February 2017 Published date: 1 March 2017 Organisations: Faculty of Engineering and the Environment Identifiers Local EPrints ID: 403881 URI: http://eprints.soton.ac.uk/id/eprint/403881 DOI: doi:10.1177/0954411917690764 ISSN: 0954-4119 PURE UUID: 1f1193f0-5b97-49ce-937f-c6f5512c9d7b ORCID for Jing Tang: orcid.org/0000-0003-3359-5891 ORCID for Liudi Jiang: orcid.org/0000-0002-3400-825X ORCID for Dan Bader: orcid.org/0000-0002-1208-3507 Catalogue record Date deposited: 15 Dec 2016 11:53 Last modified: 18 Feb 2021 17:32 Export record ASCII CitationAtomBibTeXData Cite XMLDublin CoreDublin CoreEP3 XMLEndNoteHTML CitationHTML CitationHTML ListJSONMETSMODSMPEG-21 DIDLOpenURL ContextObjectOpenURL ContextObject in SpanRDF+N-TriplesRDF+N3RDF+XMLRIOXX2 XMLReferReference ManagerSimple Metadata Altmetrics Contributors Author: Michael Mcgrath Author: Jianliang Gao Author: Jing Tang Author: Piotr Laszczak Author: Liudi Jiang Author: Dan Bader Author: David Moser Author: Saeed Zahedi University divisions Faculty of Engineering and the Environment (pre 2018 reorg) Engineering Materials and Surface Engineering Group Download statistics Downloads from ePrints over the past year. 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