Pressure-induced vasodilation and reactive hyperemia at different depths in sacral tissue under clinically relevant conditions
2014 (English)In: Microcirculation, ISSN 1073-9688, Vol. 21, no 8, 761-771 p.Article in journal (Refereed) Published
OBJECTIVE: To characterize pressure-induced vasodilatation and reactive hyperemia at different sacral tissue depths in different populations under clinically relevant pressure exposure.
METHODS: Forty-two subjects (< 65 years), 38 subjects (≥ 65 years), and 35 patients (≥ 65 years) participated. Interface pressure, skin temperature, and blood flow at tissue depths of 1 mm, 2 mm, and 10 mm (using laser Doppler flowmetry and photoplethysmography) were measured in the sacral tissue before, during, and after load in a supine position.
RESULTS: pressure-induced vasodilatation and reactive hyperemia were observed at three tissue depths. At 10 mm depth, the proportion of subjects with a lack of pressure-induced vasodilatation was higher compared to superficial depths. The patients had higher interface pressure during load than the healthy individuals, but there were no significant differences in blood flow. Twenty-nine subjects in all three study groups were identified with a lack of pressure-induced vasodilatation and reactive hyperemia.
CONCLUSIONS: pressure-induced vasodilatation and reactive hyperemia can be measured at different tissue depths. A lack of these responses was found in healthy individuals as well as in patients indicating an innate susceptibility in some individuals, and are potential important factors to evaluate in order to better understand the etiology of pressure ulcers.
Place, publisher, year, edition, pages
John Wiley & Sons, 2014. Vol. 21, no 8, 761-771 p.
Pressure ulcer, photoplethysmography, laser Doppler flowmetry, non-invasive, tissue blood flow
Nursing Clinical Medicine
IdentifiersURN: urn:nbn:se:liu:diva-109950DOI: 10.1111/micc.12160ISI: 000344789400010PubMedID: 25100630OAI: oai:DiVA.org:liu-109950DiVA: diva2:741848