A finite element model to assess transtibial prosthetic sockets with elastomeric liners.
People with transtibial amputation often experience skin breakdown due to the pressures and shear stresses that occur at the limb-socket interface. The purpose of this research was to create a transtibial finite element model (FEM) of a contemporary prosthesis that included complete socket geometry,...
| Publicado en: | Medical & Biological Engineering & Computing Vol. 56; no. 7; pp. 1227 - 1241 |
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| Autores principales: | , , , , , , |
| Formato: | diagnostic images pictorial research tables/charts Journal Article |
| Publicado: |
Springer Nature
Jul2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=130320742&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 130320742 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01400118 PO0 jtl: Medical & Biological Engineering & Computing issn: 01400118 maglogo: N pubinfo: dt: Jul2018 vid: 56 iid: 7 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 130320742 130320742 NLM29235055 130320742 10.1007/s11517-017-1758-z NLM29235055 130320742 ppf: 1227 ppct: 14 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: A finite element model to assess transtibial prosthetic sockets with elastomeric liners. aug: au: Cagle, John C. Reinhall, Per G. Allyn, Kate J. McLean, Jake Hinrichs, Paul Hafner, Brian J. Sanders, Joan E. affil: Department of Bioengineering, University of Washington, Seattle, WA, USA sug: subj: Models, Theoretical Prosthesis Design Finite Element Analysis Tibia Physiology Polymers Pharmacodynamics Male Stress, Mechanical Reproducibility of Results Magnetic Resonance Imaging Human Male ab: People with transtibial amputation often experience skin breakdown due to the pressures and shear stresses that occur at the limb-socket interface. The purpose of this research was to create a transtibial finite element model (FEM) of a contemporary prosthesis that included complete socket geometry, two frictional interactions (limb-liner and liner-socket), and an elastomeric liner. Magnetic resonance imaging scans from three people with characteristic transtibial limb shapes (i.e., short-conical, long-conical, and cylindrical) were acquired and used to develop the models. Each model was evaluated with two loading profiles to identify locations of focused stresses during stance phase. The models identified five locations on the participants' residual limbs where peak stresses matched locations of mechanically induced skin issues they experienced in the 9 months prior to being scanned. The peak contact pressure across all simulations was 98 kPa and the maximum resultant shear stress was 50 kPa, showing reasonable agreement with interface stress measurements reported in the literature. Future research could take advantage of the developed FEM to assess the influence of changes in limb volume or liner material properties on interface stress distributions. Graphical abstract Residual limb finite element model. Left: model components. Right: interface pressures during stance phase. pubtype: Academic Journal doctype: diagnostic images pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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