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consensus conference and their comments were used to create the final definitions. Pressure Ulcer Definition. A pressure ulcer is localized injury to the skin and/or underlying tissue usually over a bony prominence, as. a result of pressure, or pressure in combination with shear.
Two additional stages of pressure ulcer formation were added in 2007: 1  Suspected Deep Tissue Injury: Area of localized discolored intact skin that is purple or maroon-red in color. 2  Unstageable Pressure Ulcers: Full-tissue thickness loss where the base of the ulcer is covered by slough or an eschar. The true depth of the damage cannot be determined until the necrotic tissue is cleared away or the eschar removed and the base of the pressure ulcer is visible.