Which of the following should you report to the registered nurse when caring for a patient with a mitten restraint?

Reporting that the fingertips feel cool to touch is critical when caring for a patient in mitten restraints. Coolness in the fingertips can indicate compromised circulation or inadequate blood flow to the extremities. This is particularly concerning in the context of restraints, as they can restrict blood circulation or cause pressure injuries if not monitored closely. Any signs of altered blood flow, such as coolness, discoloration, or swelling, must be communicated to the registered nurse to ensure timely assessment and intervention.

The other options do not indicate immediate concerns. A patient who is calm and relaxed suggests that the restraint may be effectively managing their agitation without causing distress. A normal body temperature also reflects stability in the patient's condition. The ability to wiggle fingers might indicate that there is no severe restriction of movement, suggesting that circulation may still be adequate. However, the primary focus with restraints remains on ensuring the patient's safety and the proper functioning of limbs, making the report of cool fingertips essential.