Anesthesiology and Intensive Care

 MAC: prevents movement in response to surgical stimulationin 50% of patients  1.3 MAC: prevents movement in response to surgical stimulation in 95% of patients 0.3–0.4 MAC: associated with awakening from anesthesia  1.5–1.7 MAC: the concentration required to block autonomic reflexes to surgical stimulation

Higher  MAC indicates a lower potency of the volatile  anesthetic: Nitrous oxide            105 ______________________ Desfl urane                  6 ______________________ Sevofl urane                2 ______________________ Isofl urane                  1.2 ______________________ Enfl urane                  1.7 ______________________ Halothane                  0.75 ______________________ Methoxyfl urane       0.16