Why is the two-person technique preferred during bag-valve-mask ventilation?

The two-person technique during bag-valve-mask (BVM) ventilation is preferred primarily because it helps achieve a better seal and ventilation volume. When one rescuer is responsible for the bag and the other for maintaining the mask's position, the second rescuer can focus on securing the mask tightly against the patient's face. This ensures that air is effectively delivered into the lungs without significant leakage, resulting in more effective ventilation.

Additionally, having a second person allows for better coordination during the ventilation process. One rescuer can deliver breaths while the other monitors the patient’s condition, ensuring that the airway remains open and that ventilation is adequate. This approach enhances the overall efficiency and effectiveness of the BVM technique, particularly in emergency situations where access to quality ventilation can significantly impact patient outcomes. It is essential to maximize the volume of air delivered, as inadequate ventilation can lead to hypoxia and other complications.