EDAIC Anesthetic Equipment and Safety 4

Question 1

Which component of the anesthesia machine is responsible for reducing cylinder pressure from approximately 2000 psi to a safe working pressure of around 45 psi?

Accepted Answer

Pressure regulator (reducing valve)

Answer

The pressure regulator (reducing valve) steps down high cylinder pressure to a safe, consistent working pressure of approximately 45 psi for use in the machine.

Question 2

A patient breathing circuit shows persistently elevated CO2 on capnography despite adequate fresh gas flow. The MOST likely cause is:

Accepted Answer

Exhausted CO2 absorbent

Answer

Exhausted CO2 absorbent loses its capacity to neutralize exhaled CO2, leading to rebreathing and elevated inspired CO2 on capnography.

Question 3

When using a Bain circuit (Mapleson D modification), the recommended fresh gas flow for spontaneously breathing adult patients is approximately:

Accepted Answer

2–3 times minute ventilation

Answer

For spontaneous ventilation with a Bain circuit, fresh gas flows of 2–3 times the minute ventilation (~150–200 mL/kg/min) are required to prevent rebreathing.

Question 4

The Pin Index Safety System (PISS) on gas cylinders is designed to:

Accepted Answer

Prevent accidental connection of wrong gas cylinders to yokes

Answer

PISS uses unique pin configurations for each gas to prevent incorrect cylinders from being mounted on the wrong yoke connection.

Question 5

During anesthesia machine checkout, the 'oxygen flush valve' is tested. What pressure does activating this valve deliver oxygen at?

Accepted Answer

35–75 psi

Answer

The oxygen flush valve delivers oxygen directly from pipeline supply at 35–75 psi, bypassing the flowmeters and vaporizer.

EDAIC - European Diploma in Anesthesiology and Intensive Care Practice Test

EDAIC - European Diploma in Anesthesiology and Intensive Care Practice Test

EDAIC Anesthetic Equipment and Safety 4