Florida Nursing Assistant Competency Pracrice Exam

What does a decubitus ulcer commonly develop from?

1. Improper nutrition

2. Prolonged pressure on the skin

3. Frequent hydration

4. Inadequate physical exercise

The correct answer is: Prolonged pressure on the skin

A decubitus ulcer, also known as a pressure sore or bed sore, commonly develops due to prolonged pressure on the skin. When an individual remains in one position for an extended period—such as lying in bed or sitting in a wheelchair—the weight of the body compresses the skin against an underlying surface. This pressure can reduce blood flow to the area, leading to tissue damage and the formation of ulcers. Understanding the mechanics behind pressure injuries is crucial in nursing care, as it highlights the importance of repositioning patients regularly to relieve pressure and ensuring proper skin care. This aspect of patient management is key for those who may have limited mobility or are unable to shift positions themselves. Improper nutrition can contribute to skin health issues, but it is not the primary cause of decubitus ulcers. Frequent hydration is generally beneficial and helps maintain skin integrity. Inadequate physical exercise may affect overall health and mobility, but the direct cause of decubitus ulcers is specifically related to sustained pressure rather than activity levels alone.