You are the circulating nurse in the OR. The surgery began at 0700. The vital signs at 0700 were BP 120/80, RR 16, HR 88. At 0708, you notice that the patient's heart rate is 136 and the monitor is alarming. The anesthesiologist stops the anesthesia and suspects that the patient is experiencing Malignant Hyperthermia. Which of the following interventions would be inappropriate in this situation?

Choice A rationale Hyperthermia represents a hypermetabolic state where the body temperature can rise rapidly, sometimes exceeding 44 degrees Celsius. Internal cooling measures are vital to prevent cellular damage and multi-organ failure. A cooling blanket facilitates conductive heat loss through the skin. Reducing the core temperature is a priority to stabilize the metabolic rate and prevent the denaturation of critical proteins and enzymes within the systemic circulation during a crisis. Choice B rationale Malignant hyperthermia causes a massive increase in oxygen consumption and carbon dioxide production due to sustained muscle contractions. Normal respiration rates of 12 to 20 breaths per minute are insufficient. Providing high-flow 100 percent oxygen helps meet the increased metabolic demands of the tissues and assists in the elimination of excess carbon dioxide. This intervention is necessary to prevent severe respiratory and metabolic acidosis during the intraoperative emergency. Choice C rationale Administering warmed intravenous fluids is contraindicated because the primary goal in malignant hyperthermia is to lower the body temperature rapidly. Warmed fluids would further elevate the core temperature, exacerbating the hypermetabolic state and worsening the clinical outcome. Instead, chilled or cold intravenous saline is typically administered to help cool the patient from the inside out. This choice represents an inappropriate action that could harm the patient. Choice D rationale Dantrolene sodium is the specific pharmacological treatment for malignant hyperthermia. It acts as a muscle relaxant by abolishing the excitation-contraction coupling in muscle cells. Specifically, it inhibits the release of calcium ions from the sarcoplasmic reticulum. By lowering intracellular calcium levels, it stops the uncontrolled muscle contractions and the resulting heat production. Prompt administration is the most effective way to reverse the life-threatening symptoms and stabilize the patient.