Florida Nursing Assistant Competency Pracrice Exam

What can lead to skin injuries classified as pressure ulcers?

1. Prolonged pressure on the skin

2. Excessive heat exposure

3. Low humidity levels

4. Frequent movement

The correct answer is: Prolonged pressure on the skin

Prolonged pressure on the skin is a primary cause of pressure ulcers, also known as bedsores or decubitus ulcers. These injuries occur when there is consistent pressure on particular areas of the body that impedes blood flow to the skin and underlying tissues. When blood flow is restricted, the affected skin begins to break down, resulting in ulceration. This is particularly common in individuals who are immobilized or have limited mobility, as they might not be able to reposition themselves frequently enough to relieve pressure on susceptible areas such as the heels, sacrum, and elbows. While excessive heat exposure, low humidity levels, and frequent movement can negatively impact skin integrity, they do not directly cause pressure ulcers in the same way that prolonged pressure does. Excessive heat can lead to sweating or increased friction, while low humidity can dry out the skin, making it more susceptible to damage, but neither of these factors is a direct cause of ulcer formation. Frequent movement, on the contrary, is helpful as it helps redistribute pressure and promote better circulation, reducing the risk of pressure ulcers.