NBCRNA Anesthesia Equipment and Technology

Question 1

On the anesthesia machine, the fail-safe valve is designed to prevent the delivery of hypoxic gas mixtures by doing what?

Accepted Answer

Proportionally reducing nitrous oxide flow when oxygen pressure drops

Answer

Alarming when FiO2 falls below 21%

Answer

Shutting off the vaporizer when N2O is on

Answer

Increasing oxygen flow automatically

Question 2

The circle breathing system uses soda lime to do what?

Accepted Answer

Absorb carbon dioxide from exhaled gases

Answer

Generate fresh oxygen for rebreathing

Answer

Remove volatile anesthetic vapors

Answer

Filter bacterial contamination

Question 3

A capnograph waveform showing an elevated baseline (above zero) throughout the respiratory cycle suggests what problem?

Accepted Answer

CO2 rebreathing due to exhausted absorbent

Answer

Esophageal intubation

Answer

Bronchospasm

Answer

Venous air embolism

Question 4

During a pre-use anesthesia machine check, which test verifies that the low-pressure circuit is leak-free?

Accepted Answer

Negative pressure (suction bulb) leak test

Answer

Oxygen flush valve test

Answer

Vaporizer interlock test

Answer

Flowmeter calibration check

Question 5

What does a sustained upslope (shark fin appearance) in the capnography waveform indicate?

Accepted Answer

Obstructive airway disease or bronchospasm

Answer

Esophageal intubation

Answer

Hyperventilation

Answer

Pulmonary embolism

Question 6

The purpose of a pressure-limiting (pop-off) valve in the anesthesia breathing circuit is to do what?

Accepted Answer

Release excess gas pressure to scavenge system

Answer

Prevent negative pressure in the circuit

Answer

Regulate fresh gas flow rate

Answer

Monitor peak inspiratory pressure