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Evaluation of antidecubitus mattresses
Mälardalen University, Department of Computer Science and Electronics.
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2005 (English)In: Medical & Biological Engineering & Computing, ISSN 0140-0118, Vol. 43, no 5, 541-547 p.Article in journal (Refereed) Published
Abstract [en]

Pressure sores are a current problem in hospitals and care of the elderly, leading to protracted hospital stays and a high care burden. The trauma for the patients is severe, and the cost of pressure sore prevention and treatment, is considerable. Antidecubitus mattresses are used for prevention and in treatment, but they also contribute to the cost of treating pressure sores. The problem highlighted in the review is that the mattresses' effectiveness in preventing and treating pressure sores has not been sufficiently evaluated. When antidecubitus mattresses are evaluated, it is often only with regard to aspects of the interface pressure and the mattresses' ability to redistribute the pressure. The review points out the important observation that, to be able to evaluate the efficacy of the antidecubitus mattress, the mattress's effect on tissue viability needs to be studied. The parameters that ought to be considered when evaluating a support surface are: interface pressure, pressure and blood flow distribution, temperature and humidity in the skin-support surface interface. The authors propose that the effect on tissue viability of external loading can be assessed by simultaneous measurement of the interface pressure and tissue perfusion.

Place, publisher, year, edition, pages
2005. Vol. 43, no 5, 541-547 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mdh:diva-3995DOI: 10.1007/BF02351025ISI: 000234262300001Scopus ID: 2-s2.0-29244476864OAI: oai:DiVA.org:mdh-3995DiVA: diva2:120501
Available from: 2006-04-18 Created: 2006-04-18 Last updated: 2016-01-11Bibliographically approved
In thesis
1. Pressure sore etiology - highlighted with optical measurements of the blood flow
Open this publication in new window or tab >>Pressure sore etiology - highlighted with optical measurements of the blood flow
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

In line with the quality awareness of good prevention of pressure sores and in treatment of those sores already developed, evaluation of antidecubitus mattresses plays an important role. However, there are shortages in the evaluations performed today, since often interface pressure is the only parameter regarded. Since ischaemia in the tissue is the primary cause of pressure sore, the focus in this thesis is on blood flow measurements in tissue exposed external loading. To study the tissue blood flow would give a better and more direct indication on the mattress effectiveness in minimizing the negative effects on the tissue viability.

The results presented in this thesis reveal that the superficial blood flow in areas prone to pressure sore development, is affected by increased skin temperature and external loading of the tissue. Both the effects from pressure and shear stress have been studied.

Measurements of the tissue blood flow is interesting to relate to the two theories about at which tissue layer the pressure sores start to develop. To achieved more knowledge about the pressure sore etiology and also be able to non-invasively measure the tissue blood flow for evaluations of antidecubitus mattresses an optical sensor has been developed. The sensor combines the two optical methods, laser Doppler flowmetry and photoplethysmography. With the design of the sensor, measurements of the superficial skin blood flow and the deeper blood flow, even the muscle blood flow, can be performed. Measurement depths of 2 mm, 8 mm, and 20 mm into the tissue is assumed.

Preliminary result from measurements performed with the optical sensor in four test subjects, revealed great individual differences in blood flow, but also different response to the same external loading at different measurement depths, in the same individual. This new optical sensor is likely to be of great value in future studies of pressure sore etiology and in future evaluations of antidecubitus mattresses.

Place, publisher, year, edition, pages
Västerås: Mälardalens högskola, 2006. 49 p.
Series
Mälardalen University Press Licentiate Theses, ISSN 1651-9256 ; 63
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Elektronik
Identifiers
urn:nbn:se:mdh:diva-135 (URN)91-85485-11-X (ISBN)
Presentation
2006-05-11, Kappa, Mälardalens högskola, Högskoleplan 1, 721 23 Västerås, 10:00
Opponent
Supervisors
Available from: 2006-04-18 Created: 2006-04-18

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Citation style
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