Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

Which of the following contributes to reduced tissue tolerance for pressure injuries?

1. Increased physical activity

2. Muscle wasting

3. Regular skin assessments

4. Increased hydration

The correct answer is: Muscle wasting

Muscle wasting is a significant factor that contributes to reduced tissue tolerance for pressure injuries. When muscle mass decreases, there is less padding and support over bony prominences, which increases the susceptibility of the skin and underlying tissues to pressure damage. Muscle plays a crucial role in distributing weight and absorbing pressure exerted during immobility. Therefore, individuals with muscle wasting are at higher risk for developing pressure injuries because their tissues may not withstand the compressive forces as effectively. In contrast, increased physical activity generally enhances circulation and muscle tone, which can protect against pressure injuries. Regular skin assessments help identify any changes in skin integrity early, allowing for timely interventions. Increased hydration is important for maintaining skin elasticity and overall health, further reducing the risk of pressure injuries. Therefore, muscle wasting stands out as the primary contributor to diminished tissue tolerance against pressure.