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What are the four stages of pressure sores?

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What are the four stages of pressure sores?

Pressure sore stages are determined by the depth of the wound. Stage I: Patch of redness, usually over a bony prominence, with the skin intact. The reddened area may feel painful or warm to the touch. Stage II: The first layer of skin is worn away, showing a pink area or wound below. It may look like a scrape, blister, or shallow crater. The area is tender and painful. Stage III: The full layer of skin is gone. Fatty tissue may be seen. Tunneling, which means greater damage than can be visualized, may be present. Stage IV: The pressure injury is very deep, reaching the muscle and bone. Serious complications can occur at Stage IV.

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