CFRN Flight and Transport 3

Question 1

A patient being transported via helicopter at 5,000 feet cabin altitude has a SpO2 of 88% on 4 L/min NC. The flight nurse's priority action is:

Accepted Answer

Apply a non-rebreather mask at 15 L/min

Answer

Switching to a non-rebreather mask maximizes FiO2 immediately, which is the fastest intervention to correct hypoxia at altitude.

Question 2

Which of the following is the BEST indicator of proper oxygen cylinder management for a 2-hour fixed-wing transport of a ventilated patient on 10 L/min?

Accepted Answer

Calculate tank duration and confirm sufficient supply before departure

Answer

The flight nurse must calculate O2 consumption (flow rate × time) and confirm that on-board supply exceeds estimated need plus reserve before departure.

Question 3

During air medical transport, the phenomenon of 'flicker vertigo' is caused by:

Accepted Answer

Sunlight flickering through rotating rotor blades at 4–20 Hz

Answer

Flicker vertigo occurs when sunlight pulses through rotor blades at 4–20 cycles/second, potentially triggering photosensitive seizures or spatial disorientation.

Question 4

A CFRN is preparing to transport a neonate requiring 40% FiO2. At a flight altitude resulting in a cabin altitude of 6,000 feet, the equivalent FiO2 needed to maintain the same PaO2 is approximately:

Accepted Answer

50–55%

Answer

At 6,000 feet cabin altitude, barometric pressure drops approximately 20%, so FiO2 must increase proportionally to roughly 50–55% to maintain equivalent PaO2.

Question 5

The 'sterile cockpit' concept in air medical operations means:

Accepted Answer

Non-essential communication with flight crew is prohibited during critical flight phases

Answer

Sterile cockpit prohibits non-essential crew communication during takeoff, landing, and other critical flight phases to prevent distraction-related accidents.

CFRN - Certified Flight Registered Nurse Practice Test

CFRN - Certified Flight Registered Nurse Practice Test

CFRN Flight and Transport 3