Which of the following is used to prevent laryngospasm due to GA:
**Core Concept**
Laryngospasm is a life-threatening condition characterized by the sudden closure of the larynx, leading to obstruction of the airway. During general anesthesia (GA), the airway reflexes are suppressed, making laryngospasm a significant risk.
**Why the Correct Answer is Right**
To prevent laryngospasm, a non-depolarizing neuromuscular blocking agent (NMBA) is administered to paralyze the muscles of the larynx and trachea. Succinylcholine is a depolarizing NMBA, which can actually trigger laryngospasm. The correct choice is a non-depolarizing agent that can prevent laryngospasm by blocking acetylcholine receptors at the neuromuscular junction, thereby relaxing the laryngeal muscles.
**Why Each Wrong Option is Incorrect**
* **Option A:** Succinylcholine is a depolarizing NMBA that can trigger laryngospasm due to its agonist action on nicotinic acetylcholine receptors.
* **Option B:** (Missing option)
* **Option D:** (Missing option)
**Clinical Pearl / High-Yield Fact**
Non-depolarizing NMBAs, such as rocuronium and vecuronium, can be used to prevent laryngospasm during GA by blocking the acetylcholine receptors at the neuromuscular junction.
**Correct Answer:** C. Non-depolarizing neuromuscular blocking agent (e.g., rocuronium).