Deep Tissue Injury
This presents as a localized, persistent, and non-blanchable area that is dark red, maroon, or even purple in color. The DTI cannot be accurately staged because the skin remains intact and the extent of the wound beneath cannot be visualized.
Bezzant, John L. 1997. Necrosis [Image description:The purple/red area on the heel ...]. Knowledge Weavers Project, Spencer S. Eccles Health Sciences Library, University of Utah. https://collections.lib.utah.edu/ark:/87278/s6zs5w8c