What is the definition of a pressure ulcer?

A pressure ulcer, also known as a bedsore or decubitus ulcer, is specifically defined as a localized injury to the skin and underlying tissue that occurs as a direct result of prolonged pressure, often in combination with shear and friction. This condition typically develops in areas of the body where bony prominences are located, such as the heels, sacrum, and elbows, particularly in individuals who have limited mobility.

The development of a pressure ulcer is primarily influenced by factors such as decreased blood flow to the affected area, which can lead to tissue necrosis and damage. Understanding this definition is crucial in healthcare settings, as it underscores the importance of regular skin assessments, repositioning patients, and implementing preventative measures to ensure skin integrity, especially for those at risk.

The other choices do not align with the clinical definition of a pressure ulcer. For example, a skin condition resulting from dry skin addresses a different issue of skin integrity, while burns related to heat exposure and rashes due to allergic reactions refer to completely separate dermatological problems. These distinctions are essential for accurate diagnosis and effective treatment.