What is a necessary condition for using a BVM safely?

Using a Bag-Valve-Mask (BVM) safely requires the presence of a second person to ensure effective ventilation. This is because one person is needed to maintain the seal of the mask on the patient's face while the other person is responsible for squeezing the bag to ventilate the patient. The collaboration enhances the effectiveness of the BVM and reduces the risk of air escaping, leading to inadequate ventilation. A single rescuer may struggle to achieve a proper seal and deliver proper breaths, which can compromise the victim's oxygenation. Therefore, having a second team member is essential to provide an adequate respiratory support during a medical emergency.