Sacral pressure-induced blood flow responses at different tissue depths during one hour supine bedrest in nursing home residents
2015 (English)Manuscript (preprint) (Other academic)
Background. Pressure induced vasodilation (PIV) protects the skin from pressure induced ischemia. PIV responses at individual level during a long-term measurement period have not previously been described in an elderly population in a clinically relevant situation.
Aim. To describe individual PIV responses in a nursing home resident population for 1-hour periods of bed rest.
Method. From May 2011 to August 2012, blood flow at three tissue depths was measured for one hour over the sacrum in 0° supine position and 30° supine tilt position in 25 individuals aged 65 years or older while lying on a pressure redistributing mattress. Measurements were made using the non-invasive optical techniques Laser Doppler Flowmetry (LDF) and photoplethysmography. The individuals were divided into a PIV group and a non-PIV group based upon the LDF data.
Results. In the PIV group, the blood flow in almost all cases increased immediately and remained over baseline for the entire 60 minutes of loading in both positions, while the blood flow decreased immediately and remained below baseline in the non-PIV group. These blood flow patterns were also seen in deeper tissue layers although a PIV response was most common in the underlying tissue in both groups.
Conclusion. The cutaneous blood flow response among the nursing home residents was distinct, appeared early and remained during the one hour of loading in both the PIV and non-PIV group. The non-PIV group may be more vulnerable to pressure and thus may be at risk for pressure ulcer development. More research is needed in order to verify the results.
Place, publisher, year, edition, pages
Tissue blood flow, pressure-induced vasodilation, interface pressure, skin temperature, pressure ulcer, nursing home residents
IdentifiersURN: urn:nbn:se:liu:diva-117446OAI: oai:DiVA.org:liu-117446DiVA: diva2:808213