Which surface is not typically considered pressure-relieving?

• A. Gel-overlay cushions
• B. Alternating pressure mattresses
• C. High-density foam mattresses
• D. Rigid innerspring mattress

Answer: (D)

Pressure-relieving surfaces work by distributing body weight and allowing immersion and envelopment so peak pressures at bony areas are minimized. Gel-overlay cushions mold to the body and spread pressure, reducing high-pressure points. Alternating pressure mattresses periodically shift pressure away from any one area, giving true relief over time. High-density foam provides good contouring and support, helping distribute load more evenly than standard foam. A rigid innerspring mattress, however, resists contouring and immersion, keeping pressure concentrated under bony prominences and increasing risk of pressure-related issues. Therefore, the surface not typically pressure-relieving is the rigid innerspring mattress.