What are important components of the mechanism of injury by pressure injuries (pressure ulcers)?

Updated: Mar 26, 2020
  • Author: Christian N Kirman, MD; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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Answer

Shear forces and friction aggravate the effects of pressure and are important components of the mechanism of injury (see the image below). [22] Maceration may occur in a patient who has incontinence, predisposing the skin to injury. Pressure, shear forces, and friction cause microcirculatory occlusion and consequent ischemia, which leads to inflammation and tissue anoxia. Tissue anoxia leads to cell death, necrosis, and ulceration.

 

Advanced sacral pressure ulcer shows effects of pr Advanced sacral pressure ulcer shows effects of pressure, shearing, and moisture.

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