which statement about bag-valve-mask (BVM) resuscitators is
true?
Select the correct answer to this question.
The BVM should extend past the patient’s chin when it is properly placed.
A two-person technique is the preferred methodology for bag-valve-mask (BVM)
ventilations as it provides better seal and ventilation volume.
The bag should be depressed completely to deliver a volume of 1,000 to 2,000
mL oxygen.
Supplemental oxygen should not be attached to the BVM.
The Correct Answer and Explanation is :
The correct answer is: A two-person technique is the preferred methodology for bag-valve-mask (BVM) ventilations as it provides better seal and ventilation volume.
Explanation:
Bag-valve-mask (BVM) resuscitators are crucial tools in providing artificial ventilation to patients who are unable to breathe adequately on their own. The effectiveness of BVM ventilation hinges on a proper seal around the patient’s face, which is best achieved with a two-person technique.
1. Importance of the Two-Person Technique:
In a two-person technique, one rescuer holds the mask in place while the other squeezes the bag. This allows for more consistent pressure on the mask, which is critical for creating an airtight seal. A good seal ensures that the air being delivered from the bag goes into the lungs rather than leaking out, thus maximizing ventilation efficiency. Studies have shown that the two-person method improves the volume of air delivered and reduces the risk of air entering the stomach, which can lead to complications such as vomiting or aspiration.
2. Incorrect Statements:
- The BVM should extend past the patient’s chin when it is properly placed. This statement is false; the mask should fit snugly over the patient’s nose and mouth without extending beyond the chin.
- The bag should be depressed completely to deliver a volume of 1,000 to 2,000 mL oxygen. This statement is misleading. A typical adult BVM bag delivers about 500 mL of air with each squeeze, and while multiple squeezes may be necessary, complete depression of the bag is not required for each breath.
- Supplemental oxygen should not be attached to the BVM. This is also incorrect; supplemental oxygen is typically attached to the BVM to increase the oxygen concentration delivered to the patient, improving the effectiveness of ventilation.
In conclusion, using a two-person technique enhances the effectiveness of BVM ventilation, making it the preferred method in emergency situations.