Why Two Rescuers Are Better
One-person BVM ventilation requires a single hand to hold the mask seal while the same hand lifts the jaw and the other hand squeezes the bag. Many providers struggle to maintain a seal with this method, which leads to air leaks and gastric distention. The two-person technique lets one provider use both hands to seal the mask and thrust the jaw while the second provider squeezes the bag.
Proper Mask Seal and Positioning
Use the thenar eminence and thumbs to press the mask onto the face, with the fingers pulling the mandible upward into the mask (the E-C clamp). Place the apex of the mask over the bridge of the nose and the base between the lower lip and chin. Use an oropharyngeal or nasopharyngeal airway to keep the tongue from obstructing the airway.
NREMT Exam Takeaways
The exam often tests the fact that the two-person technique is preferred for any patient who needs assisted ventilation. Deliver breaths over about one second, watch for visible chest rise, and ventilate at 10 to 12 breaths per minute for an adult with a pulse. Avoid over-ventilation, which raises intrathoracic pressure and reduces venous return.