Drug used for emergency intubation is
**Core Concept**
Emergency intubation is a critical procedure in anesthesia and critical care medicine where a patient is sedated and an endotracheal tube is inserted into their airway to secure their airway and ensure adequate ventilation. The choice of drug for emergency intubation depends on the clinical scenario and the patient's underlying conditions.
**Why the Correct Answer is Right**
The correct answer is a muscle relaxant, specifically a non-depolarizing neuromuscular blocker, which is used to facilitate intubation by relaxing the muscles of the airway and allowing for smooth insertion of the endotracheal tube. This is typically achieved through inhibition of the nicotinic acetylcholine receptors at the neuromuscular junction, preventing acetylcholine from binding and initiating muscle contraction. This class of drugs is often used in conjunction with a sedative or anesthetic to ensure a smooth and safe intubation process.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because succinylcholine is a depolarizing neuromuscular blocker, which can cause muscle fasciculations and rigidity, making intubation more difficult.
**Option B:** This option is incorrect because propofol is a sedative, but it does not provide the muscle relaxation needed for intubation.
**Option C:** This option is incorrect because fentanyl is an opioid analgesic, which can be used for pain relief and sedation, but it does not provide the necessary muscle relaxation for intubation.
**Clinical Pearl / High-Yield Fact**
When choosing a muscle relaxant for emergency intubation, it's essential to consider the patient's underlying conditions, such as renal or hepatic impairment, which may affect the drug's metabolism and clearance. Additionally, knowing the reversal agents for each class of muscle relaxant is crucial in case of post-intubation respiratory depression.
**Correct Answer: C. Rocuronium**