What should the nurse emphasize to Preston Wright regarding his IV therapy?

The emphasis on avoiding pressure on the heel and sacrum is crucial in the context of IV therapy, especially for patients who may be at risk for pressure injuries or have limited mobility. These areas are particularly vulnerable due to the weight of the body resting on them, which can lead to skin breakdown and ulcer formation.

When a patient is receiving IV therapy, they may need to be in a specific position for extended periods while the infusion is taking place. If pressure builds up on areas like the heel or sacrum, it can significantly increase the risk of developing pressure ulcers, especially in individuals who may be less mobile or have other risk factors.

Highlighting this aspect helps ensure that the patient takes active measures to shift their weight or reposition themselves periodically, thereby promoting comfort and preventing complications related to immobility or pressure.

The other choices, although relevant in their contexts, do not emphasize the prevention of pressure injuries as effectively. While remaining still during the infusion may contribute to the IV maintaining its position, it does not address the risk of pressure injury. Similarly, feeling pressure on the IV site or discomfort may indicate complications that require attention, but these concepts do not encompass the broader need for skin integrity and patient safety during IV therapy.