What is the correct method of ventilating a patient using bag-valve-mask?

The correct approach to ventilating a patient using a bag-valve-mask involves ensuring a tight seal on the mask, opening the airway appropriately, and delivering breaths at a rate of 10-12 breaths per minute.

A tight seal is critical to prevent air leaks, which can reduce the effectiveness of ventilation. If air leaks out around the mask, the patient does not receive adequate breaths, which can lead to hypoxia and further complications.

Opening the airway is equally important, as it allows for a clear passage for air to flow into the lungs. Typically, this is achieved by using the head-tilt-chin-lift maneuver or, in certain situations, the jaw-thrust maneuver for patients suspected of having cervical spine injuries.

The recommended ventilation rate of 10-12 breaths per minute corresponds to a relaxed and safe delivery of air, allowing adequate time for exhalation while preventing hyperventilation, which can lead to elevated intrathoracic pressure and reduce blood flow to the heart.

Overall, this combination of techniques ensures that positive pressure ventilation is effective, minimizes the risk of complications, and maximizes the patient's oxygenation and ventilation needs.