Sitting can cause ischaemia in the subcutaneous tissue of the buttocks, which implicates multilayer tissue damage in the development of pressure ulcers
2009 (English)In: Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery, ISSN 0284-4311, E-ISSN 2000-656X, Vol. 43, no 2, 82-89 p.Article in journal (Refereed) Published
A better understanding of how pressure ulcers develop in the buttocks will improve prophylactic measures. Our aim was to investigate signs of reduced perfusion and ischaemia in the subcutaneous fat in the buttocks during sitting. A microelectrode was used to quantify oxygen (pO2). Metabolites that indicate aerobic or anaerobic metabolism (glucose, lactate, pyruvate, and glycerol) were quantified using microdialysis. Sixteen healthy people were studied while they sat on a wheel chair cushion, and a hard surface. Sitting pressures were mapped, and the thickness of the subcutaneous fatty layer was measured. The results showed that pO2 and glucose were significantly reduced during sitting, and for pO2 the effect is significantly more profound during sitting on a hard surface. After loading, both glucose and pO2 increased significantly. We conclude that the subcutaneous adipose tissue covering the ischial tuberosities becomes ischaemic during sitting. This finding supports the theory that not only is the skin involved in early development of pressure ulcers, but also the deeper tissues.
Place, publisher, year, edition, pages
2009. Vol. 43, no 2, 82-89 p.
Pressure ulcer development, spinal cord injury, ischaemia, reperfusion, microdialysis, microelectrode, adipose tissue, sitting pressure
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-17697DOI: 10.1080/02844310902749455OAI: oai:DiVA.org:liu-17697DiVA: diva2:211636