Which of the following symptoms did the patient most likely experience upon recovery from sedation?

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: The MAC (minimum alveolar concentration) of an inhalational anesthetic is defined as the alveolar concentration at which 50% of patients do not move in response to a surgical stimulus. It is related to the blood/gas partition coefficient of the anesthetic, which determines the rate at which the anesthetic enters and leaves the bloodstream, influencing its potency.

Correct Answer: D

Rationale: The correct answer is D. Increased skeletal muscle tone, fever, skeletal muscle contractions, and diaphoresis are signs of malignant hyperthermia, a rare but life-threatening condition triggered by certain anesthesia agents like halothane and succinylcholine in susceptible individuals. This condition can lead to severe metabolic and respiratory acidosis, cardiac arrhythmias, and hyperkalemia.

Correct Answer: B

Rationale: The decrease in MAC in this case can be attributed to the use of two anesthetics, nitrous oxide and sevoflurane. When two anesthetics are used together, their combined effect can lead to a lower MAC requirement for surgical anesthesia. This phenomenon is known as MAC sparing. In this case, the combination of nitrous oxide and sevoflurane resulted in a lower total MAC requirement of 0.7, compared to the usual 1.3 MAC in most patients. Therefore, the use of two anesthetics is the most likely variable that caused the decrease in MAC in this case.