What is a pressure ulcer?

A pressure ulcer, also known as a bedsore or decubitus ulcer, specifically refers to a sore that develops from prolonged pressure on the skin. This occurs when sustained pressure restricts blood flow to the area, typically over bony prominences such as the heels, sacrum, or elbows. When tissue does not receive enough blood, it can become damaged and eventually break down, leading to the formation of a sore.

Understanding pressure ulcers is crucial in a healthcare context, especially for caregivers and nursing assistants, as they often care for patients who may be bedridden or have limited mobility. Prevention strategies include regular repositioning of patients and ensuring they are on appropriate support surfaces to relieve pressure.

The other options describe different medical conditions or injuries. A bruise results from a minor injury but does not develop from sustained pressure like a pressure ulcer does. An infection caused by bacteria involves pathogens, while a skin condition due to allergic reactions relates to hypersensitivity rather than pressure-induced damage. These distinctions underline the unique nature of pressure ulcers and highlight the importance of addressing them in patient care.