Existence of Tissue Blood Flow in Response to External Pressure in the Sacral Region of Elderly Individuals - Using an Optical Probe Prototype
2010 (English)In: MICROCIRCULATION, ISSN 1073-9688, Vol. 17, no 4, 311-319 p.Article in journal (Refereed) Published
Pandgt;Objective: The aim was to investigate the existence of sacral tissue blood flow at different depths in response to external pressure and compression in elderly individuals using a newly developed optical probe prototype. Methods: The tissue blood flow and tissue thickness in the sacral area were measured during load in 17 individuals using laser Doppler flowmetry and photoplethysmography in a combined probe, and digital ultrasound. Results: The mean age was 68.6 +/- 7.0 years. While loading, the mean compression was 60.3 +/- 11.9%. The number of participants with existing blood flow while loading increased with increased measurement depth. None had enclosed blood flow deep in the tissue and at the same time an existing more superficial blood flow. Correlation between tissue thickness and BMI in unloaded and loaded sacral tissue was shown: r = 0.68 (P = 0.003) and r = 0.68 (P = 0.003). Conclusions: Sacral tissue is highly compressed by external load. There seems to be a difference in responses to load in the different tissue layers, as occluded blood flow in deeper tissue layers do not occur unless the blood flow in the superficial tissue layers is occluded.
Place, publisher, year, edition, pages
Taylor and Francis , 2010. Vol. 17, no 4, 311-319 p.
pressure ulcer, photoplethysmography, laser Doppler flowmetry, non-invasive, tissue blood flow
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-56449DOI: 10.1111/j.1549-8719.2010.00027.xISI: 000277123800008OAI: oai:DiVA.org:liu-56449DiVA: diva2:319263
This is an electronic version of an article published in:
Sara Bergstrand, Toste Länne, Maria Linden and Margareta Lindgren, Existence of Tissue Blood Flow in Response to External Pressure in the Sacral Region of Elderly Individuals - Using an Optical Probe Prototype, 2010, MICROCIRCULATION, (17), 4, 311-319.
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Copyright: Taylor and Francis