The perioperative nurse noticed abrasions on Mr. Jennings' elbows in the ICU. What likely caused this skin injury?

The observation of abrasions on Mr. Jennings' elbows in the ICU is most likely attributed to friction from his elbows rubbing against the sheets. In a hospital setting, especially in intensive care units, patients may spend extended periods in bed, often leading to pressure and friction on areas of the skin that are in contact with surfaces such as sheets. This friction can cause abrasions and skin damage, particularly if the patient is restless or has limited mobility.

Friction injuries are quite common in patients who may be unable to reposition themselves frequently enough to relieve pressure from areas of the skin, which can result in skin breakdown. Proper positioning and using adequate padding can help prevent such injuries, highlighting the importance of vigilant nursing care in managing patients' skin integrity.

Other options, such as negligence or improper bed height adjustment, could potentially lead to skin injuries, but they do not directly address the immediate cause of abrasions on the elbows as effectively as friction does. Infection from surgery might contribute to other skin conditions but is less likely the cause of localized abrasions. Therefore, the most plausible explanation for the abrasions observed is the result of friction.