What is described as a Stage III pressure ulcer?

A Stage III pressure ulcer is characterized by full-thickness tissue loss where subcutaneous fat may be visible, but there is no exposure of bone, tendon, or muscle. The presence of slough, which is a yellow or gray tissue that may be moist, can also be observed in this stage. The key aspect of a Stage III ulcer is that it extends through the epidermis and dermis, potentially affecting deeper tissues but still maintaining some level of tissue coverage above underlying structures.

This definition aligns with the characteristics of a Stage III ulcer, making it the correct choice. Understanding the different stages of pressure ulcers is crucial for effective assessment and treatment, emphasizing the need for careful monitoring of any changes in wound presentation to prevent further deterioration. In contrast, the other options describe different stages of pressure ulcers, such as Stage I, which involves intact skin with redness, and Stage II, where there is partial-thickness loss and might present as an open sore but does not reach the full thickness required for Stage III.