CFRN Respiratory Emergencies and Mechanical Ventilation 3

Question 1

What is the primary risk of administering 100% FiO2 for extended periods during flight transport?

Accepted Answer

Absorption atelectasis and oxygen toxicity

Answer

Prolonged 100% FiO2 causes nitrogen washout, absorption atelectasis, and oxygen-induced lung injury (oxygen toxicity) over time.

Question 2

A patient on CPAP via facemask vomits during transport. What is the immediate priority?

Accepted Answer

Remove the mask, suction the airway, and prepare for intubation if needed

Answer

Vomiting with a tight-fitting CPAP mask creates aspiration risk; remove the mask immediately, clear the airway by suctioning, and reassess the need for definitive airway.

Question 3

Which breath sound finding is associated with pulmonary edema during auscultation in-flight?

Accepted Answer

Bilateral basilar crackles (rales)

Answer

Pulmonary edema causes fluid accumulation in the alveoli, producing bilateral fine crackles (rales) heard predominantly at the lung bases.

Question 4

Auto-PEEP (intrinsic PEEP) is most likely to develop in which type of transport patient?

Accepted Answer

Mechanically ventilated COPD or asthma patient with air trapping

Answer

Patients with obstructive lung disease (COPD, asthma) develop auto-PEEP due to incomplete exhalation, causing progressive air trapping and hemodynamic compromise.

Question 5

What is the recommended initial SpO2 target for adult non-COPD patients during air medical transport?

Accepted Answer

94–98%

Answer

For most adult patients, SpO2 of 94–98% is the recommended target to ensure adequate oxygenation without unnecessary hyperoxia.

CFRN - Certified Flight Registered Nurse Practice Test

CFRN - Certified Flight Registered Nurse Practice Test

CFRN Respiratory Emergencies and Mechanical Ventilation 3