CAMRT Radiography Practice Exam

Which area of the body is most vulnerable to decubitus ulcers?

1. Knees

2. Heels

3. Sacrum

4. Scapulae

The correct answer is: Sacrum

The sacrum is the area of the body most vulnerable to decubitus ulcers, commonly known as pressure ulcers or bedsores. This susceptibility arises from several factors. The sacrum is a bony prominence that bears weight when a person is lying down, particularly in the supine position. When pressure is applied to any part of the body and is not relieved, blood flow to that area can become restricted. This leads to tissue ischemia, and if pressure persists, it can result in skin breakdown. Additionally, the sacral area is typically subjected to continuous pressure, especially in immobile patients or those who are bedridden. The skin overlying the sacrum is often thinner and more prone to injury than other areas, compounding the risk. Factors such as moisture, friction, and shear can further affect the integrity of the skin in this area. While other locations such as the heels, knees, and scapulae can also develop pressure ulcers, the sacrum remains the most common site due to its anatomical and physiological vulnerabilities. Recognizing this can help healthcare providers implement preventative measures effectively, such as frequent repositioning and skin care.