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Blood flow measurements at different depths using photoplethysmography and laser Doppler techniques
Mälardalen University, School of Innovation, Design and Engineering.ORCID iD: 0000-0003-1940-1747
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2009 (English)In: Skin research and technology, ISSN 0909-752X, E-ISSN 1600-0846, Vol. 15, p. 139-147Article in journal (Refereed) Published
Abstract [en]

This study has evaluated a multi-parametric system combining laser Doppler flowmetry and photoplethysmography in a single probe for the simultaneous measurement of blood flow at different depths in the tissue. This system will be used to facilitate the understanding of pressure ulcer formation and in the evaluation of pressure ulcer mattresses.

The blood flow in the tissue over the sacrum was measured before, during and after loading with 37.5 mmHg, respectively, 50.0 mmHg. The evaluation of the system consisted of one clinical part, and the other part focusing on the technicalities of the probe prototype.

An increase in blood flow while loading was the most common response, but when the blood flow decreased during loading it was most affected at the skin surface and the blood flow responses may be different due to depths of measurement. Reactive hyperaemia may occur more frequently in the superficial layers of the tissue.

The study showed that the new system is satisfactory for measuring tissue blood flow at different depths. The laser Doppler complements the photoplethysmography, and further development of the system into a thin flexible probe with the ability to measure a larger area is required.

Place, publisher, year, edition, pages
2009. Vol. 15, p. 139-147
Identifiers
URN: urn:nbn:se:mdh:diva-7256DOI: 10.1111/j.1600-0846.2008.00337.xISI: 000265077700002Scopus ID: 2-s2.0-65449166465OAI: oai:DiVA.org:mdh-7256DiVA, id: diva2:237266
Available from: 2009-09-25 Created: 2009-09-25 Last updated: 2017-12-13Bibliographically approved

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Lindén, Maria

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