A study of the effect of hole drilling on a viscoelastic foam cushion for reduction of ischial pressure

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A study of the effect of hole drilling on a viscoelastic foam cushion for reduction of ischial pressure

 

Author: Tse, Lee-shing Jeffrey
Title: A study of the effect of hole drilling on a viscoelastic foam cushion for reduction of ischial pressure
Degree: M.Sc.
Year: 1998
Subject: Bedsores -- Prevention
Cushions
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Jockey Club Rehabilitation Engineering Centre
Pages: vii, 59 leaves : ill. ; 29 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1439070
URI: http://theses.lib.polyu.edu.hk/handle/200/1061
Abstract: Pressure sore prevention is an ongoing challenge to health care professionals and those who design and manufacture specialized cushion equipment for the disabled. The treatment of pressure sore is costly and is a tremendous burden to the carers and health care providers. Obviously, the most efficient way to manage pressure sore is the prevention of their occurrence. Hole drilling on Polyurethane (PU) cushions was found to be effective in reducing pressure for abled seaters (Kang & Mak, 1997). However, how effective it is applied for disabled seaters and how to improve the effectiveness of pressure relief is worth investigating. In this study, nine disabled subjects were asked to sit on a cushion, firstly with no hole drilled, and then 3 other times with progressively more holes drilled. Ischial pressures were measured in a cushion before and after modification of hole drilling. The result indicated a trend for pressure reduction with the first two hole patterns. However there was a slightly increase in ischial pressure on cushion with hole pattern 3. Based on the statistical results, the mean average ischial pressure and mean maximum ischial pressure showed significant pressure reduction by 9.5% and 16% respectively (帢=0.05) using the hole pattern 2 method. In addition, hole density was demonstrated to be important on pressure reduction. In conclusion, simple hole drilling on Sunmate cushion provided significant pressure relief for disabled seaters.

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