In the side-lying position, which site is commonly at risk for pressure sores?

• A. Greater trochanter
• B. Acromion process
• C. Ribs
• D. Medial malleolus

Answer: (A)

In side-lying, the body’s weight rests on the lateral hip, making the greater trochanter a primary pressure point. This bony prominence is close to the surface with relatively little soft tissue padding, so sustained external pressure here can compress blood vessels and reduce blood flow to the overlying tissue. Over time, this ischemia leads to tissue damage and pressure sores. Keeping the area well-supported and relieving pressure through positioning and padding—such as placing a pillow under the pelvis or between the legs and using a cushioned mattress—helps offload this site and prevent ulcers. While the acromion can also be a risk in this position, the greater trochanter is the most common and critical site due to bearing the body's weight in side-lying. Ribs and the medial malleolus are less likely to endure prolonged pressure in this posture.