What best describes a stage 4 pressure ulcer?

A stage 4 pressure ulcer is characterized by a complete loss of skin layers, extending down to underlying tissues, which may include exposure of muscle, tendons, and bone. This classification indicates that the ulcer has significantly progressed through the stages of pressure ulcer development, moving from superficial layers of skin to more profound structures.

In this stage, the ulcer can have various presentations, potentially contaminated with necrotic tissue or eschar, but the defining feature is the depth and severity of tissue loss. It is critical for medical professionals to recognize the signs of a stage 4 pressure ulcer, as this condition requires intensive treatment and management to promote healing and prevent complications.

The other descriptions reflect different stages or manifestations of skin issues, but only the complete loss of skin with underlying tissue exposure accurately characterizes a stage 4 pressure ulcer.