2680: According to the Occupational Safety and Health Administration (OSHA), operating room personnel should not be exposed to more than how many parts per million of a halogenated agent? What if nitrous oxide is used?
If nitrous oxide is also used, the maximum exposure to halogenated agents allowed by OSHA is 0.5 ppm. If nitrous oxide is not used, then the maximum exposure is 2 ppm. The maximum exposure to nitrous alone is 25 ppm.
3423: What is MAC?
MAC represents “the Mean Alveolar Concentration that prevents movement in 50% of subjects in response to a surgical incision.”
3505: What is MAC-BAR?
MAC-BAR refers to the concentration of inhaled anesthetic that Blunts Adrenergic Response to skin incision (increased heart rate, blood pressure, plasma norepinephrine levels). MAC-BAR50 is the dose of volatile anesthetic that prevents the adrenergic response in 50% of patients and MAC-BAR95 is the dose that prevents an adrenergic response in 95% of patients.