Which statement about bag-valve-mask (BVM) resuscitators is true?

A. The BVM should extend past the patient's chin when it is properly placed.

B. A two-person technique is the preferred methodology for bag-valve-mask (BVM) ventilations as it provides a better seal and ventilation volume.

C. The bag should be depressed completely to deliver a volume of 1,000 to 2,000 mL oxygen.

D. Supplemental oxygen should not be attached to the BVM.

Answer:

B. A two-person technique is the preferred methodology for bag-valve-mask (BVM) ventilations as it provides a better seal and ventilation volume.

Explanation:

B. True:

The two-person BVM technique is preferred because:

Why the other options are incorrect:

The BVM mask should fit over the nose and mouth and not extend past the chin. It must seal properly to be effective but should not cover areas beyond what's needed.

Delivering 1,000–2,000 mL is too much. The proper tidal volume is about 500–600 mL per breath—just enough to see chest rise. Over-ventilation can cause complications like gastric inflation or barotrauma.

Supplemental oxygen should be attached to the BVM whenever available to increase the oxygen concentration delivered to the patient (can provide up to 100% oxygen).