ACLS Practice Test: Video 5 Answers (20 Questions)

Question 1

During CPR, PETCO2 remains persistently below 10 mmHg. What does this most strongly suggest?

Accepted Answer

Need to improve compression quality

Answer

A low PETCO2 reflects poor cardiac output, so compression quality should be optimized.

Question 2

Which of the following is the recommended oxygen saturation (SpO2) target after ROSC during post-arrest care?

Accepted Answer

94–99%

Answer

Post-ROSC oxygen therapy should target SpO2 of 94–99% to avoid both hypoxia and hyperoxia, which can worsen neurologic outcomes.

Question 3

How long should interruptions in chest compressions last during an endotracheal intubation attempt?

Accepted Answer

Under 10 seconds

Answer

Compression pauses for intubation should be kept under 10 seconds.

Question 4

Which method is the most reliable for confirming and monitoring endotracheal tube placement?

Accepted Answer

Continuous waveform capnography

Answer

Continuous waveform capnography is the most reliable confirmation and monitoring method for tube placement.

Question 5

When performing bag-mask ventilation during CPR, what is the recommended tidal volume?

Accepted Answer

500–600 mL (enough to produce visible chest rise)

Answer

Tidal volumes of 500–600 mL, sufficient to produce visible chest rise, are recommended to avoid gastric inflation and barotrauma.