Final answer:
The nursing measure recommended for preventing pressure ulcers in a patient with diabetes and limited mobility is to place a pillow under the calves to elevate the heels option (a), and position the patient in a 30-degree lateral turn position.
Step-by-step explanation:
To prevent pressure ulcers in a patient with diabetes and limited mobility, the recommended nursing measure is a) Placing a pillow under the calves to elevate the heels. This action will reduce the risk of heel breakdown by alleviating pressure on the heels. Patients at high risk for pressure ulcers should avoid staying in one position and should especially avoid pressure on bony areas of the body.
It is also recommended to position such patients at a 30-degree lateral turn position, rather than a medial turn, to evenly distribute weight and minimize pressure on at-risk areas. While higher-specification foam mattresses are advised over standard hospital foam mattresses for additional support and comfort, alternating pressure support surfaces are specifically needed for patients who already have ulcers, which is not the case for this patient at the moment.