North Carolina EMT State Practice Exam

Which device is used for self-refilling during ventilation?

1. Oxygen powered ventilation device

2. 2-person BVM

3. Mouth to mask

4. BVM

The correct answer is: BVM

The device used for self-refilling during ventilation is indeed the Bag-Valve-Mask (BVM). This device is designed to deliver positive pressure ventilation to patients who are not breathing adequately or at all. The BVM consists of a self-expanding bag that, when squeezed, forces air into the patient's lungs through a one-way valve. Once the bag is released, it automatically refills by drawing in surrounding air, which allows for continuous and efficient ventilation. This feature is particularly useful in emergency situations, as it enables a single provider to manage ventilation effectively without the constant need for supplemental oxygen during each squeeze of the bag. In contrast, other options such as the oxygen-powered ventilation device rely on a dedicated oxygen source, while the two-person BVM technique is designed for scenarios where two rescuers are available to optimally manage the airway and ventilation, requiring coordination but without the self-refilling advantage. The mouth-to-mask technique involves a direct seal and manual airway management with a singular breath amount, which does not allow for a self-refilling mechanism. Therefore, the BVM is clearly the most efficacious choice for self-refilling ventilation in emergency medical situations.