A patient presents with malignant hypehermia and metabolic acidosis. Immediate treatment should be staed with
**Core Concept**
Malignant hyperthermia (MH) is a life-threatening medical emergency characterized by an uncontrolled hypermetabolic state, rapid rise in body temperature, and metabolic acidosis. It is often triggered by exposure to volatile anesthetics or succinylcholine, and is associated with a genetic predisposition.
**Why the Correct Answer is Right**
The immediate treatment for malignant hyperthermia involves the administration of dantrolene, a direct-acting skeletal muscle relaxant that inhibits calcium ion release from the sarcoplasmic reticulum. Dantrolene rapidly reverses the hypermetabolic state, reduces body temperature, and improves cardiac function. The administration of dantrolene is crucial in the initial management of MH, as it directly addresses the underlying pathophysiology of the condition.
**Why Each Wrong Option is Incorrect**
**Option A:** Haloperidol is an antipsychotic medication that is not indicated in the initial treatment of malignant hyperthermia.
**Option B:** Atropine is an anticholinergic medication that can exacerbate the hypermetabolic state in MH.
**Option C:** Fentanyl is an opioid analgesic that can trigger or worsen MH in susceptible individuals.
**Clinical Pearl / High-Yield Fact**
Dantrolene is the only FDA-approved medication for the treatment of malignant hyperthermia, and it should be administered promptly in patients with suspected or confirmed MH.
**Correct Answer: D. Dantrolene**