How does impaired mobility affect the risk of pressure ulcers?

Impaired mobility significantly increases the risk for pressure ulcers. When an individual has limited movement, they are less able to shift their position, which is crucial in alleviating pressure on bony prominence areas of the body. This sustained pressure reduces blood flow to the affected skin and tissues, leading to tissue ischemia and subsequently the formation of pressure ulcers.

Pressure ulcers, also known as decubitus ulcers, typically develop in areas where bone is close to the skin, such as the heels, hips, and back. Regular movement or repositioning is essential to distribute weight evenly and relieve pressure, promoting healthy blood circulation. Therefore, without the ability to move freely, individuals are at a much higher risk of developing these ulcers due to prolonged pressure on specific areas of the body.

The other options do not accurately reflect the connection between mobility and the risk of pressure ulcers, as impaired mobility logically leads to a higher risk rather than a reduction in need for repositioning or improvement in circulation.