Final answer:
Procedures that extend beyond two hours greatly increase the risk of developing pressures ulcers or bedsores, particularly in immobile or elderly patients. Frequent repositioning is a preventative practice used in healthcare settings.
Step-by-step explanation:
Procedures longer than two hours significantly increase the risk of pressure ulcer formation, also known as bedsore or decubitis ulcer development. These are caused by constant, unrelieved pressure on certain areas of the body, often over bony prominences, which can reduce blood flow and lead to tissue necrosis. To prevent bedsores, it is a common practice in medical facilities to reposition patients, typically those who are elderly or immobile, every few hours. Neglecting to regularly reposition patients can lead to serious complications if the bedsores become infected.