Journal of Rehabilitation Research & Development (JRRD)

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Volume 50 Number 6, 2013
   Pages 845 — 860

Abstract — How does adding and removing liquid from socket bladders affect residual-limb fluid volume?

Joan E. Sanders, PhD;* John C. Cagle, BSE; Daniel S. Harrison, BS; Timothy R. Myers, MME; Kathryn J. Allyn, CPO

Department of Bioengineering, University of Washington, Seattle, WA

Abstract — Adding and removing liquid from socket bladders is a means for people with limb loss to accommodate residual-limb volume change. We fit 19 people with transtibial amputation using their regular prosthetic socket with fluid bladders on the inside socket surface to undergo cycles of bladder liquid addition and removal. In each cycle, subjects sat, stood, and walked for 90 s with bladder liquid added, and then sat, stood, and walked for 90 s again with the bladder liquid removed. The amount of bladder liquid added was increased in each cycle. We used bioimpedance analysis to measure residual-limb fluid volume. Results showed that the preferred bladder liquid volume was 16.8 +/– 8.4 mL (mean +/– standard deviation), corresponding with 1.7% +/– 0.8% of the average socket volume between the bioimpedance voltage-sensing electrodes. Residual-limb fluid volume driven out of the residual limb when bladder liquid was added was typically not recovered upon subsequent bladder liquid removal. Of the 19 subjects, 15 experienced a gradual residual-limb fluid volume loss over the test session. Care should be taken when implementing adjustable socket technologies in people with limb loss. Reducing socket volume may accentuate residual-limb fluid volume loss.

Key words: accommodation, amputation, bioimpedance, fluid insert, interface pressure, prosthesis, prosthetic socket, residual limb, transtibial, volume.


View HTML  ¦  View PDF  ¦  Contents Vol. 50, No. 6
This article and any supplementary material should be cited as follows:
Sanders JE, Cagle JC, Harrison DS, Myers TR, Allyn KJ. How does adding and removing liquid from socket bladders affect residual-limb fluid volume? J Rehabil Res Dev. 2013;50(6):845–60.
http://dx.doi.org/10.1682/JRRD.2012.06.0121
ResearcherID/ORCID: Joan E. Sanders, PhD: E-8204-2011
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Last Reviewed or Updated  Tuesday, September 10, 2013 10:17 AM

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