To study the change of pressure generated by pressure garments upon active limb movements

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To study the change of pressure generated by pressure garments upon active limb movements

 

Author: Lam, Shuk-yan
Title: To study the change of pressure generated by pressure garments upon active limb movements
Degree: M.Sc.
Year: 2008
Subject: Hong Kong Polytechnic University -- Dissertations.
Pressure suits -- Therapeutic use.
Hypertrophic scars -- Care.
Pressure transducers.
Department: Dept. of Rehabilitation Sciences
Pages: ix, 95 leaves : ill. (some col.) ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2276522
URI: http://theses.lib.polyu.edu.hk/handle/200/4730
Abstract: Introduction Pressure therapy is the most common non-invasive means of preventing and controlling hypertrophic scarring (Macintyre, 2007; Kerckhove, Fieuws, & Massage, 2007; Herndon, 2002). The success or failure of the treatment is determined by the amount of pressure exerted by the pressure garments on the skin (Macintyre & Baird, 2006). Low pressures fail to produce required pressure to influence scar (Giele et al., 1998) whereas high pressures are potentially harmful (Sone et al., 2000). Previous works mostly focused on examining the pressure generated by pressure garment in a resting position (Macintyre, 2007; Kerckhove, Fieuws, & Massage, 2007; Yildiz, 2007; Liu et al., 2007; Giele et al., 1997). However, it is likely that pressure would change throughout the day during different activities of daily living. Objective The purpose of this study was to examine the effect of active limb movements on pressure change generated by pressure garments. Method Skin-garment interface (SG) pressure on twelve body parts was measured in both static and dynamic circumstances in 30 healthy volunteers and 7 subjects with hypertrophic scars. Static pressure was measured when elbow/knee was fully extended which formed a baseline of measurement. Dynamic pressure was then measured during elbow and knee movement from full extension to full flexion. The novel pliance-x system was used to measure the SG pressure while synchronized active elbow and knee range of motion was recorded by the DS3000 electrogoniometer. Results Results of repeated measures analysis of variance (ANOVA) found that active limb movements significantly influenced the change of SG pressure (P<0.05). Increasing flexion of the elbow and knee joints significantly increased the SG pressure over all the measured body sites. The change of SG pressure was dramatic around the joint, especially over flexural creases. More gradual change was found over proximal and distal part of the limb with the least pressure change was observed over proximal limb girdle. Similar findings were found in subjects with hypertrophic scars. Active joint movements may be one of the most important factors influencing the skin pressure profiles generated by pressure garments. The results of the study increased our understanding of the mechanism of pressure garments applying on active human beings and were important in formulating the guidelines for design and regulation of pressure garment in management of hypertrophic scar.

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