Which technique is crucial for performing effective bag-mask ventilation?

A proper seal and head positioning are essential for performing effective bag-mask ventilation because they ensure that the mask fits correctly on the patient's face, preventing air leaks. When a proper seal is achieved, the positive pressure generated by squeezing the bag can adequately deliver oxygen to the lungs. Additionally, appropriate head positioning is critical to align the airway and maximize ventilation. The sniffing position, where the neck is slightly extended and the head tilted back, can open the airway, further enhancing the effectiveness of the ventilation.

Effective bag-mask ventilation relies significantly on these two factors, as any leaks or misalignment can result in inadequate ventilation, leading to poor patient outcomes. This approach allows for the most efficient transfer of oxygen, which is vital in emergency situations where every second counts.