STAN STAGE 4 PRESSURE INJURY MODEL™0970 0975 Stan Stage 4 Pressure Injury Model features a large sacral Stage 4 pressure injury (per NPUAP 2016 Pressure Ulcer Staging Guidelines), with eschar, subcutaneous fat, undermining, tunneling, slough, eschar and exposed bone with osteomyelitis. This model also includes a Stage 3 pressure injury with subcutaneous fat and granulation tissue. The large size and depth of the Stage 4 pressure injury, as well as the undermining and tunneling, make it