ANESTHESIA MACHINE AND EQUIPMENT CORE
ANESTHESIA DELIVERY SYSTEMS AND SAFETY
REVIEW 2026
◉ The oxygen flush valve
a. allows oxygen to flow into the breathing system without going
through the vaporizer
b. increases the anesthetic concentration within the circuit
c. causes the patient to breathe deeper
d. is used primarily to keep the reservoir bag deflated.
Answer: a. allows oxygen to flow into the breathing system without
going through the vaporizer
◉ The advantages of a nonrebreathing system, as compared with a
circle breathing system, include all of the following, except
a. reduced resistance to breathing
b. greater potential for hypothermia caused by high flows needed
c. reduced mechanical dead space
d. no soda lime required.
Answer: b. greater potential for hypothermia caused by high flows
needed
, ◉ The minimum fresh gas flow in a semiclosed system is correctly
determined by the
a. patients metabolic rate
b. patients respiratory rate
c. drugs used for premedication
d. size of the soda lime canister.
Answer: a. patients metabolic rate
◉ All inhalant anesthetic machines should have
a. a nitrous oxide flowmeter
b. blood pressure monitors
c. respiratory monitors
d. an anesthetic waste gas scavenging system.
Answer: d. an anesthetic waste gas scavenging system
◉ Vaporizers may be classified by all of the following except the
a. method of regulating output
b. method of vaporization
c. location in the anesthetic circuit
d. type of breathing circuit with which they can be used.
Answer: d. type of breathing circuit with which they can be used
ANESTHESIA DELIVERY SYSTEMS AND SAFETY
REVIEW 2026
◉ The oxygen flush valve
a. allows oxygen to flow into the breathing system without going
through the vaporizer
b. increases the anesthetic concentration within the circuit
c. causes the patient to breathe deeper
d. is used primarily to keep the reservoir bag deflated.
Answer: a. allows oxygen to flow into the breathing system without
going through the vaporizer
◉ The advantages of a nonrebreathing system, as compared with a
circle breathing system, include all of the following, except
a. reduced resistance to breathing
b. greater potential for hypothermia caused by high flows needed
c. reduced mechanical dead space
d. no soda lime required.
Answer: b. greater potential for hypothermia caused by high flows
needed
, ◉ The minimum fresh gas flow in a semiclosed system is correctly
determined by the
a. patients metabolic rate
b. patients respiratory rate
c. drugs used for premedication
d. size of the soda lime canister.
Answer: a. patients metabolic rate
◉ All inhalant anesthetic machines should have
a. a nitrous oxide flowmeter
b. blood pressure monitors
c. respiratory monitors
d. an anesthetic waste gas scavenging system.
Answer: d. an anesthetic waste gas scavenging system
◉ Vaporizers may be classified by all of the following except the
a. method of regulating output
b. method of vaporization
c. location in the anesthetic circuit
d. type of breathing circuit with which they can be used.
Answer: d. type of breathing circuit with which they can be used
