What does bag/valve/mask ventilation depend on?

Bag/valve/mask ventilation is a critical technique in airway management that ensures adequate ventilation in patients who are unable to breathe effectively on their own. This method relies heavily on the proper positioning of the mandible, which is crucial for maintaining a clear and open airway. By positioning the mandible forward, the tongue is also elevated away from the oropharynx, thus preventing it from obstructing the airway. This effectively allows the bag/valve/mask system to create a better seal against the patient's face, facilitating the delivery of oxygen and preventing air leaks during ventilation.

While other factors such as mouth positioning and the patient’s age and size can influence overall success in providing ventilation, the primary mechanism through which effective ventilation is achieved is through proper tongue and jaw positioning. Therefore, ensuring the mandible is positioned to keep the tongue forward is essential for successful bag/valve/mask ventilation.