What must be done before using a BVM?

Before using a Bag-Valve-Mask (BVM) device, it is essential to attach it to an oxygen reservoir bag. This is crucial because the BVM is designed to provide positive pressure ventilation to patients who are not breathing adequately or at all. By connecting the BVM to an oxygen reservoir, you ensure that the patient receives a higher concentration of oxygen during each ventilation cycle. The reservoir bag helps in delivering the supplemental oxygen effectively as it fills with oxygen and allows for its immediate availability when compressing the bag to create positive pressure.

Proper use of the BVM is fundamental in providing effective ventilation, especially in emergency situations. The availability of high-flow oxygen significantly improves the efficiency of ventilation and boosts the chances of restoring adequate breathing and oxygenation, which is vital in life-saving scenarios.