GENERAL HISTOLOGY

Detailed explanation-1: -an open wound or blister – a category 2 pressure ulcer. a deep wound that reaches the deeper layers of the skin – a category 3 pressure ulcer. a very deep wound that may reach the muscle and bone – a category 4 pressure ulcer.

Detailed explanation-2: -They are caused when an area of skin is placed under pressure. They are sometimes known as “bedsores” or “pressure sores". Pressure ulcers can range in severity from patches of discoloured skin to open wounds that expose the underlying bone or muscle.

Detailed explanation-3: -Stage I: A reddened, painful area on the skin that does not turn white (blanch) when pressed. This is a sign that a pressure ulcer may be forming. The skin may be warm or cool, firm or soft. Stage II: The skin blisters or forms an open sore.

Detailed explanation-4: -Injuries to the superficial layers of the skin caused by friction are not pressure ulcers and should not be classified or treated as such.