The correct answer is A. Gastric distention.

Decreased airway compliance means there is increased resistance when ventilating the patient, making it harder to deliver breaths with a bag-valve mask (BVM).

Why A is correct:

Gastric distention occurs when air is forced into the stomach during ventilation, especially if:

Ventilations are too forceful

Ventilations are delivered too quickly

The airway is not properly opened

This leads to:

Increased pressure in the abdomen

Upward pressure on the diaphragm

Reduced lung expansion

NREMT-based airway management guidance states:

“Gastric distention can impair ventilation by limiting lung expansion.”

“Excessive ventilation pressure may force air into the stomach, decreasing compliance.”

Why the other options are incorrect:

B. A poor face mask seal: This causes air leakage, not decreased compliance. You would feel less resistance, not more.

C. A low oxygen flow rate: Affects oxygen delivery, not airway compliance or resistance.

D. The patient ' s age: A 27-year-old has no age-related compliance issues.

Exact Extracts:

“Gastric distention increases resistance to ventilation and decreases lung compliance.”

“Air forced into the stomach can reduce the effectiveness of ventilations.”

“Proper ventilation technique is essential to prevent gastric inflation.”