A client demonstrates signs of malignant hyperthermia after anesthesia; which nursing action demonstrates understanding of the prescribed treatment?

• A. Notify the surgeon immediately.
• B. Administer benzodiazepines to calm the patient.
• C. Stop all medications and observe for 24 hours.
• D. Prepare to administer dantrolene and monitor the heart rhythm, vital signs, electrolyte levels, and urine output continuously.

Answer: (D)

Malignant hyperthermia is a life-threatening reaction to certain anesthetic drugs that causes uncontrolled calcium release in skeletal muscle, leading to a hypermetabolic state with rapid increases in heart rate, body temperature, and metabolic demand. The critical treatment is to administer dantrolene, a muscle relaxant that directly inhibits calcium release from the sarcoplasmic reticulum, thereby halting the runaway metabolic process. Because time is crucial, the nursing action that best demonstrates understanding is to prepare to give dantrolene and to monitor the patient continuously—including heart rhythm, vital signs, electrolyte levels, and urine output—so you can detect and manage complications like arrhythmias, hyperkalemia, acidosis, and kidney injury from muscle breakdown. Additional supportive steps include stopping triggering agents and providing 100% oxygen with aggressive cooling, but the core nursing action centers on readiness to administer dantrolene and ongoing, comprehensive monitoring. Other options miss this immediate, targeted treatment or fail to address the ongoing physiologic derangements MH causes.