Determining the stage of a pressure sore involves examining the depth and severity of the tissue damage. Here are the critical criteria for staging pressure sores:
- Stage 1: Non-blanchable erythema of intact skin.
- Stage 2: Partial thickness skin loss with exposed dermis.
- Stage 3: Full thickness skin loss. Adipose (fat) is visible in the ulcer, but bone, tendon, and muscle are not exposed.
- Stage 4: Full thickness tissue loss with exposed bone, tendon, or muscle.
Given the options and the requirement to classify the pressure sore shown in the image, we can determine its stage based on visible characteristics. If the sore displays exposed bone, tendon, or muscle, it is classified as:
Stage 4