Minimum Alveolar Concentration of sevoflurane in % is

**Core Concept**
The Minimum Alveolar Concentration (MAC) of an inhaled anesthetic is a measure of its potency, defined as the concentration of the anesthetic in the lungs that is required to prevent movement in 50% of patients in response to a painful stimulus, such as a surgical incision. MAC values are used to compare the potency of different anesthetics and to determine the required concentrations for safe anesthesia.

**Why the Correct Answer is Right**
Sevoflurane is a volatile anesthetic agent with a MAC value of 2%. This means that a concentration of 2% sevoflurane in the lungs is sufficient to prevent movement in 50% of patients in response to a painful stimulus. The MAC value of sevoflurane is lower than that of other inhalational anesthetics, such as isoflurane (1.15%) and desflurane (6%), indicating its greater potency. The MAC value of sevoflurane is also lower at higher altitudes, where the partial pressure of oxygen is lower.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.
* **Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
When using sevoflurane for anesthesia, it is essential to ensure that the concentration is accurately measured and delivered to the patient, as a higher concentration than necessary can increase the risk of respiratory depression and other adverse effects.

**Correct Answer:** 2. 2%.