02 February 2023 02 Feb 2023

A PU has been defined as ‘localised injury to the skin and/or underlying tissue usually over a bony prominence, as a result of pressure, or pressure in combination with shear. A number of contributing or confounding factors are also associated with PUs; the significance of these factors is yet to be elucidated’ (NPUAP/EPUAP/PPPIA, 2014). This definition has been adopted by the National Institute of Health and Care Excellence in its latest PU guideline update (2019).