What action should an EMT take when ventilating a pediatric patient with a bag-valve mask?

When ventilating a pediatric patient with a bag-valve mask, ensuring a tight seal with the mask is crucial for effective ventilation. A proper seal prevents air from escaping and promotes adequate positive pressure ventilation into the lungs. In the pediatric population, where anatomical differences can affect airway management, achieving a good seal is particularly important to ensure that the air delivered through the bag actually reaches the lungs.

While it may be necessary to adjust some factors to achieve effective ventilation, blocking or closing any safety mechanisms like the pop-off valve can lead to dangerous situations, such as barotrauma or over-inflation of the lungs. Monitoring for adequate chest rise is also essential, as it can validate whether air is entering the lungs effectively. However, the primary focus should be on ensuring that the mask fits well to create the necessary pressure for ventilation.