CAA CAA Anesthesia Equipment & Technology 3

Question 1

Which BIS (bispectral index) value range is typically targeted for adequate general anesthesia?

Accepted Answer

40–60

Answer

0–20

Answer

70–80

Answer

90–100

Question 2

What is the primary hazard of a hypoxic gas mixture that an oxygen analyzer in the breathing circuit is designed to detect?

Accepted Answer

Delivery of less than 21% inspired oxygen

Answer

Excessive volatile anesthetic concentration

Answer

Carbon dioxide rebreathing

Answer

Nitrous oxide contamination of the scavenging system

Question 3

A sudden decrease in end-tidal CO2 to near zero with continued ventilator cycling most likely indicates:

Accepted Answer

Massive pulmonary embolism or esophageal intubation

Answer

Bronchospasm

Answer

Inadequate anesthetic depth

Answer

Malignant hyperthermia

Question 4

In a closed scavenging interface, the positive-pressure relief valve opens when:

Accepted Answer

Suction flow is insufficient to handle the waste gas volume

Answer

Patient inspiratory effort exceeds circuit pressure

Answer

The CO2 absorbent becomes exhausted

Answer

Ventilator bellows compress fully on exhalation

Question 5

Which ventilator alarm should prompt immediate assessment for a circuit disconnect or massive leak?

Accepted Answer

Low exhaled tidal volume / disconnect alarm

Answer

High peak inspiratory pressure alarm

Answer

High respiratory rate alarm

Answer

Low inspiratory flow alarm

Question 6

Which monitoring modality uses near-infrared spectroscopy (NIRS) to assess regional cerebral oxygen saturation?

Accepted Answer

Cerebral oximetry (rSO2)

Answer

Pulse oximetry (SpO2)

Answer

Electroencephalography (EEG)

Answer

Transcranial Doppler (TCD)