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Design and Fabrication of a New Expandable Transtibial Liner with Manual Volume Control: A Prototype.

Authors
  • M J, Nouri1
  • G, Aminian2
  • F, Farahmand3
  • M, Rahgozar4
  • 1 PhD Candidate, Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Science, Tehran, Iran. , (Iran)
  • 2 PhD, Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Science, Tehran, Iran. , (Iran)
  • 3 PhD, Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran. , (Iran)
  • 4 PhD, Department of Biostatistics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. , (Iran)
Type
Published Article
Journal
Journal of biomedical physics & engineering
Publication Date
Aug 01, 2020
Volume
10
Issue
4
Pages
543–548
Identifiers
DOI: 10.31661/jbpe.v0i0.2001-1056
PMID: 32802802
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Diurnal volume changes is one of the main factors influencing socket fit in transtibial prosthesis and causing pressure problem issues. Embedded bladder liners have been recently a potential approach to deal with this problem. The aim of this technical note was to introduce a new transtibial silicone liner designed based on hybrid socket theory. To make expandability in the liner, an integrated wax structure was constructed over the selected areas of the positive model and then removed after lamination process. In addition, a mechanical system with manual control was designed to fit the liner with the residual limb volume by pumping the water in or out of the liner through connective tubes. The results showed that this new design had high reliability in maintaining identical surface pressures after volume changes in laboratory trials. Therefore, it seems that selective expandability of this liner would accommodate residual limb volume fluctuations without disturbing effect on preliminary pressure pattern. Copyright: © Journal of Biomedical Physics and Engineering.

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