Final answer:
Contracture boots are not a measure for preventing pressure ulcers; instead, repositioning, applying skin barrier creams, and changing incontinence pads are effective preventive strategies.
Step-by-step explanation:
The preventive measures to avoid pressure ulcers in elderly patients include various strategies, except for the use of contracture boots in immobile patients, which is not typically a measure for preventing bedsores. These boots are designed to prevent foot and ankle deformities, not to relieve pressure on areas prone to ulcer development. The correct preventive measures include repositioning the patient every 2 hours, applying skin barrier creams to high-pressure areas, and changing incontinence pads as soon as they are soiled. These actions help in maintaining skin integrity and improving blood flow, consequently preventing the formation of bedsores or decubitus ulcers caused by prolonged pressure, especially over bony prominences.