NUR 751 Inhaled/Volatile Anesthetics–Questions
and Answers | 2026 Update | 100% Correct.
what substances are inhaled anesthetics?
volatile liquids, halogenated agents, xenon (rare), N2O
which inhaled anesthetics are used in current practice?
N2O, sevo, iso, des
desired characteristics of inhaled anesthetic
nonflammable- organic compounds/ether are highly flammable
poor lipid solubility
resist metabolism
favorable recovery
minimal side effects
on/off fast
simple delivery
versatile
HD stable
molecular structure of volatiles
halogenated hydrocarbons
which molecules are the halogens of halogenated hydrocarbons?
fluoride (better)
chloride (worse)
, why are volatiles halogenated? what is the downside?
decrease combustibility and flammability
BUT increase toxicity
why is fluoride better than chloride for halogenation?
increases stability and decreases toxicity compared to chloride
what is MAC?
minimum alveolar concentration- % at which half of patients don't move to painful stimulus
68% of patients won't move at _____ MAC
95% of patients won't move at _____ MAC
99% of patients won't move at _____ MAC
1.1
1.2
1.3
what are the MAC values for the gases?
"I Smell Donuts Nearby"
Iso- 1.17 <-- most potent
Sevo- 2
Des- 6
N2O- 104 <-- least potent
how to calculate MAC
and Answers | 2026 Update | 100% Correct.
what substances are inhaled anesthetics?
volatile liquids, halogenated agents, xenon (rare), N2O
which inhaled anesthetics are used in current practice?
N2O, sevo, iso, des
desired characteristics of inhaled anesthetic
nonflammable- organic compounds/ether are highly flammable
poor lipid solubility
resist metabolism
favorable recovery
minimal side effects
on/off fast
simple delivery
versatile
HD stable
molecular structure of volatiles
halogenated hydrocarbons
which molecules are the halogens of halogenated hydrocarbons?
fluoride (better)
chloride (worse)
, why are volatiles halogenated? what is the downside?
decrease combustibility and flammability
BUT increase toxicity
why is fluoride better than chloride for halogenation?
increases stability and decreases toxicity compared to chloride
what is MAC?
minimum alveolar concentration- % at which half of patients don't move to painful stimulus
68% of patients won't move at _____ MAC
95% of patients won't move at _____ MAC
99% of patients won't move at _____ MAC
1.1
1.2
1.3
what are the MAC values for the gases?
"I Smell Donuts Nearby"
Iso- 1.17 <-- most potent
Sevo- 2
Des- 6
N2O- 104 <-- least potent
how to calculate MAC
