Hall Anesthesia Review EXAM (New 2026/
2027 Update) Questions & Answers {Grade
A} 100% Correct (Verified Solutions)
An incompetent ventilator pressure-relief valve can result in
A. Hypoxia
B. Barotrauma
C. A low-circuit-pressure signal
D. Hypoventilation
E. Hyperventilation - Correct answer : D. Hypoventilation
*there would be a direct communication between the patient breathing circuit and the
scavenging system circuit. This would result in delivery of part of the VT during the
inspiratory phase of the ventilator cycle directly to the scavenging system
The pressure gauge of a size "E" compressed-gas cylinder containing air shows a
pressure of 1000 psi. Approximately how long could air be delivered from this cylinder
at the rate of 10 L/min?
A. 10 minutes
B. 20 minutes
,C. 30 minutes
D. 40 minutes
E. 50 minutes - Correct answer : C. 30 minutes
Full tank = 660L and 2200 psi
660 L/2200 psi = 0.3 (psi -> L conversion factor)
1000 psi x 0.3 = 300 L
300 L / 10 L/min = 30 min
The most frequent cause of mechanical failure of the anesthesia delivery system to
deliver adequate O2 to the patient is
A. Attachment of the wrong compressed-gas cylinder to the O2 yoke
B. Crossing of pipelines during construction of the OR
C. Improperly assembled O2 rotameter
D. Fresh-gas line disconnection from the anesthesia machine to the in-line hosing
E. Disconnection of the O2 supply system from the patient - Correct answer :
E. Disconnection of the O2 supply system from the patient
,The esophageal detector device
A. Uses a negative pressure bulb
B. Is especially useful in children younger than 1 year of age
C. Requires a cardiac output to function appropriately
D. Is reliable in morbidly obese patients and parturients
E. Is contraindicated if there is blood in the airway - Correct answer : A. Uses a
negative pressure bulb
*The esophageal detector device (EDD) is essentially a bulb that is first compressed
then attached to the ETT after the tube is inserted into the patient. The pressure
generated is about negative 40 cm of water.
*If the ETT is placed in the esophagus, then the negative pressure will collapse the
esophagus and the bulb will not inflate.
*If the ETT is in the trachea, then the air from the lung will enable the bulb to inflate
The reason CO2 measured by capnometer is less than the arterial PaCO2 value
measure simultaneously is?
, A. Use of ion specific electrode for blood gas determination
B. Alveolar capillary gradient
C. One way values
D. Alveolar dead space
E. Intrapulmonary shunt - Correct answer : D. Alveolar dead space
*The difference between the end-tidal CO2 (EtCO2) and the arterial CO2 (PaCO2) is
typically 5-10 mm Hg and is due to alveolar dead space ventilation
Which of the following arrangements of rotameters on the anesthesia machine
manifold is safest with left to right gas flow?
A. O2, CO2, N2O, air
B. CO2, O2, N2O, air
C. N2O, O2, CO2, air
D. Air, CO2, O2, N2O
E. Air, CO2, N2O, O2 - Correct answer : E. Air, CO2, N2O, O2
2027 Update) Questions & Answers {Grade
A} 100% Correct (Verified Solutions)
An incompetent ventilator pressure-relief valve can result in
A. Hypoxia
B. Barotrauma
C. A low-circuit-pressure signal
D. Hypoventilation
E. Hyperventilation - Correct answer : D. Hypoventilation
*there would be a direct communication between the patient breathing circuit and the
scavenging system circuit. This would result in delivery of part of the VT during the
inspiratory phase of the ventilator cycle directly to the scavenging system
The pressure gauge of a size "E" compressed-gas cylinder containing air shows a
pressure of 1000 psi. Approximately how long could air be delivered from this cylinder
at the rate of 10 L/min?
A. 10 minutes
B. 20 minutes
,C. 30 minutes
D. 40 minutes
E. 50 minutes - Correct answer : C. 30 minutes
Full tank = 660L and 2200 psi
660 L/2200 psi = 0.3 (psi -> L conversion factor)
1000 psi x 0.3 = 300 L
300 L / 10 L/min = 30 min
The most frequent cause of mechanical failure of the anesthesia delivery system to
deliver adequate O2 to the patient is
A. Attachment of the wrong compressed-gas cylinder to the O2 yoke
B. Crossing of pipelines during construction of the OR
C. Improperly assembled O2 rotameter
D. Fresh-gas line disconnection from the anesthesia machine to the in-line hosing
E. Disconnection of the O2 supply system from the patient - Correct answer :
E. Disconnection of the O2 supply system from the patient
,The esophageal detector device
A. Uses a negative pressure bulb
B. Is especially useful in children younger than 1 year of age
C. Requires a cardiac output to function appropriately
D. Is reliable in morbidly obese patients and parturients
E. Is contraindicated if there is blood in the airway - Correct answer : A. Uses a
negative pressure bulb
*The esophageal detector device (EDD) is essentially a bulb that is first compressed
then attached to the ETT after the tube is inserted into the patient. The pressure
generated is about negative 40 cm of water.
*If the ETT is placed in the esophagus, then the negative pressure will collapse the
esophagus and the bulb will not inflate.
*If the ETT is in the trachea, then the air from the lung will enable the bulb to inflate
The reason CO2 measured by capnometer is less than the arterial PaCO2 value
measure simultaneously is?
, A. Use of ion specific electrode for blood gas determination
B. Alveolar capillary gradient
C. One way values
D. Alveolar dead space
E. Intrapulmonary shunt - Correct answer : D. Alveolar dead space
*The difference between the end-tidal CO2 (EtCO2) and the arterial CO2 (PaCO2) is
typically 5-10 mm Hg and is due to alveolar dead space ventilation
Which of the following arrangements of rotameters on the anesthesia machine
manifold is safest with left to right gas flow?
A. O2, CO2, N2O, air
B. CO2, O2, N2O, air
C. N2O, O2, CO2, air
D. Air, CO2, O2, N2O
E. Air, CO2, N2O, O2 - Correct answer : E. Air, CO2, N2O, O2
