Carrying out induction in a different city would have what reliable effect on the rate of inhalation induction?

Carrying out induction in a different city would have what reliable effect on the rate of inhalation induction?

• A. Increase the rate
• B. Decrease the rate
• C. No effect
• D. Unpredictable

Answer: (C)

The speed of inhalation induction is determined by how quickly the alveolar concentration of the anesthetic builds toward the inspired concentration, which depends on the agent’s solubility in blood (blood–gas partition coefficient), the delivered inspired concentration and fresh gas flow, the patient’s alveolar ventilation, and cardiac output. Carrying out induction in a different city does not inherently change these factors, so the rate should be the same as long as the same agent, the same delivery settings, and similar patient physiology are used. Therefore there is no reliable effect from the location itself.

The speed of inhalation induction is determined by how quickly the alveolar concentration of the anesthetic builds toward the inspired concentration, which depends on the agent’s solubility in blood (blood–gas partition coefficient), the delivered inspired concentration and fresh gas flow, the patient’s alveolar ventilation, and cardiac output. Carrying out induction in a different city does not inherently change these factors, so the rate should be the same as long as the same agent, the same delivery settings, and similar patient physiology are used. Therefore there is no reliable effect from the location itself.