Which statement is true regarding ventilations using BVM?

The statement indicating that two operators improve effectiveness by sealing the mask and squeezing the bag is accurate because using a two-person approach enhances the overall efficiency of ventilations with a Bag-Valve-Mask (BVM) device. When one operator focuses on maintaining a proper seal around the patient's face, it ensures that air is delivered effectively into the lungs without significant leakage. Simultaneously, the second operator can manage the squeezing of the bag to provide consistent and adequate ventilations.

This collaborative effort is particularly important in emergencies where rapid and effective ventilations are critical. Proper seal and bag compression are essential elements of successful BVM use, making the dual-operator technique a best practice in Advanced Life Support scenarios.

The other options do not align with optimal BVM usage practices: relying on a single operator can result in inadequate mask seal and less effective ventilation. Operating without a mask seal should be avoided, as it leads to wasted effort and air escaping rather than effectively ventilating the patient. Lastly, having the patient positioned flat is not typically recommended; a slight tilt or adjustment may facilitate better airway management and improve ventilation effectiveness.