Basic Life Support (BLS) Practice Exam

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

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

2. A single person technique is more effective for BVM ventilations in all situations.

3. The use of BVM is not recommended in cases of respiratory distress.

4. BVMs can only be used on patients who are conscious.

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.

The statement that a two-person technique is the preferred methodology for bag-valve-mask (BVM) ventilations is correct because this approach allows for more effective ventilation. When two rescuers are involved, one person can maintain an optimal head position and seal the mask tightly against the patient's face, while the other person can squeeze the bag to provide breaths. This teamwork increases the chance of delivering effective volumes of air into the patient's lungs, improving the overall effectiveness of ventilation. In contrast, a single rescuer may struggle to achieve both a proper seal and efficient bag compression simultaneously, particularly in cases where the patient's anatomy or positioning makes it difficult. Thus, using a two-person technique is generally recommended, especially in critical situations where proper ventilation is vital. Furthermore, the other statements incorrectly suggest limitations or misapplications of the BVM device, while the two-person technique's advantages in certain scenarios highlight its superior efficacy in providing life-saving ventilation.