PAT PRESSURE INJURY STAGING MODEL™0980 Pat Pressure Injury Staging Model A unique, compact, comprehensive and realistic model displaying the following pressure injuries (per NPUAP 2016 National Pressure Ulcer Advisory Panel): Stage 1 (in both darkly and lightly pigmented skin), Stage 2, Stage 3 with undermining, tunneling and slough, a shallow Stage 4 over the malleolus with exposed bone and tendon, and an unstageable eschar slough wound,. The darkly pigmented skin section shows how