Final answer:
The pressure ulcer described in the question is a Stage II pressure ulcer, characterized by a shallow open ulcer with a pink wound bed.
Step-by-step explanation:
The pressure ulcer described in the question is a Stage II pressure ulcer.
In Stage I, the pressure ulcer is characterized by non-blanchable redness over an area of skin, usually over a bony prominence. Stage II ulcers are characterized by a partial-thickness loss of skin layers, presenting as a shallow open ulcer with a pink wound bed. In this stage, the wound may also be characterized by intact or ruptured serum-filled blisters.
Stage III pressure ulcers involve the full-thickness loss of skin layers and the involvement of underlying tissue. Stage IV pressure ulcers are the most severe, involving extensive tissue loss, exposing muscle, tendons, or bone.