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학습 자료 둘러보기 →A Stage 3 Pressure Injury involves full-thickness skin loss. The defining visual cue is visible subcutaneous fat in the wound bed. Slough or eschar may be present, but they do not obscure the depth of tissue loss. Undermining and tunneling may also occur.
Differentiate from a Stage 4 injury, where deeper structures like bone, tendon, or muscle are directly visible. A Stage 2 injury is partial-thickness with an exposed dermis and a shiny or dry pink wound bed, while a Stage 1 shows intact skin with non-blanchable erythema.
If slough or eschar completely obscures the wound bed, the injury is unstageable. Do not guess Stage 3 or 4 until the base is visible. Deep tissue pressure injury presents as persistent, non-blanchable deep red, maroon, or purple discoloration of intact or non-intact skin.
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