Final answer:
The nurse should massage the patient's legs when leg cramps occur during hemodialysis.
Step-by-step explanation:
The nurse should take the action of massaging the patient's legs when a patient reports leg cramps during hemodialysis. Leg cramps during hemodialysis can occur due to decreased blood flow to the muscles, electrolyte imbalances, or other factors. Massage can help improve blood circulation and relieve the cramps.
Repositioning the patient supine may not directly address the leg cramps. Giving acetaminophen (Tylenol) may help with pain relief but may not specifically resolve the cramps. Infusing a bolus of normal saline may be warranted if the patient is experiencing hypovolemia, but it may not directly address the leg cramps.