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New sensor made to discriminate between tissue blood flow at different tissue depths at the sacral area
Abstract
Evaluation of antidecubitus mattresses is to a large extent based on interface pressure and
pressure distribution measurements. These measurements do not give an answer to the effect
on the tissue microcirculation cause by the external loading. A better and more direct
parameter on the propertiesâ of the mattress would be to measure blood flow in the tissue
under loading. This paper presents a new optical sensor probe for blood flow measurement
that combines the two methods laser Doppler and photoplethysmography, PPG. With use of
two methods, multiple light wavelengths and combinations of the distances between light
sources and photodetector in the PPG, the blood flow at several different tissue depths can be
assessed. However, interference problems between the two methods occurred with the present
sensor design. The preliminary result presented in this paper, shows differences in blood flow
response at the different measurement depths.
Bibtex
@techreport{Kaisdotter Andersson (Jonsson)1065,
author = {Annika Kaisdotter Andersson (Jonsson)},
title = {New sensor made to discriminate between tissue blood flow at different tissue depths at the sacral area},
month = {April},
year = {2006},
url = {http://www.es.mdu.se/publications/1065-}
}