CAA CAA Equipment & Technology in Anesthesia

Question 1

Which component of the anesthesia machine is responsible for reducing high-pressure gas from the cylinder to a lower, usable working pressure?

Accepted Answer

Pressure regulator (reducing valve)

Answer

The pressure regulator reduces high-pressure cylinder gas to a safe working pressure of approximately 45–55 psi for use in the machine.

Question 2

The oxygen flush valve on an anesthesia machine delivers oxygen at approximately what flow rate?

Accepted Answer

35–75 L/min

Answer

The oxygen flush valve bypasses the flowmeters and vaporizer, delivering oxygen at 35–75 L/min directly to the common gas outlet.

Question 3

Which safety feature prevents the administration of a hypoxic gas mixture on a modern anesthesia machine?

Accepted Answer

Oxygen ratio monitor/controller (ORMC)

Answer

The oxygen ratio monitor/controller (ORMC) mechanically links nitrous oxide and oxygen flowmeters to ensure a minimum of 21–25% oxygen in the delivered mixture.

Question 4

In a circle breathing system, the PRIMARY function of the CO2 absorbent is to:

Accepted Answer

Absorb exhaled carbon dioxide to allow rebreathing

Answer

CO2 absorbent (e.g., soda lime or Amsorb) chemically absorbs exhaled CO2, allowing safe rebreathing and reducing fresh gas requirements.

Question 5

Which anesthesia machine alarm should prompt immediate verification that the oxygen supply has not been interrupted?

Accepted Answer

Oxygen supply low-pressure alarm

Answer

The oxygen supply low-pressure alarm activates when pipeline oxygen pressure falls below approximately 30 psi, indicating potential supply failure.

(CAA) Certified Anesthesiologist Assistant Practice Test

(CAA) Certified Anesthesiologist Assistant Practice Test

CAA CAA Equipment & Technology in Anesthesia