What is an important aspect of using the bag-mask device correctly?

Using a bag-mask device correctly is critical for ensuring effective ventilation and delivering oxygen to the patient, especially during a resuscitation effort. An important aspect of this process is ensuring a proper seal while delivering breaths.

When using the bag-mask device, achieving a tight seal between the mask and the patient's face is essential for preventing air leaks. This seal allows the positive pressure from the bag to direct the air into the lungs rather than escaping into the environment. If the mask does not fit securely, it won't adequately ventilate the patient, significantly reducing the efficacy of the rescue breaths being delivered.

The other options highlight actions that may impede effective use of the device. Aligning the mask with the mouth instead of the nose may not ensure an optimal fit because a proper mask positioning should take into account both the mouth and nose. Delivering breaths quickly without care for chest rise can lead to over-inflation and potential harm; monitoring chest rise ensures that air is entering the lungs properly. Lastly, using one hand for bagging and another for compressions can detract from the ability to maintain a proper seal on the mask, as adequate grip is often required to ensure the mask stays in place while effectively ventilating the patient.