Which device is commonly used for bag-mask ventilation?

The bag-valve-mask (BVM) is the most commonly used device for bag-mask ventilation due to its design, which allows a single rescuer or a team to deliver positive pressure ventilation to a patient who is not breathing adequately or at all. The BVM consists of a self-expanding bag that pumps air through a unidirectional valve, connected to a face mask that forms a seal over the patient's nose and mouth. This effective setup enables the rescuer to deliver oxygen-rich air directly into the lungs, which is crucial in emergency situations when a patient's respiratory drive is compromised.

Other devices listed serve different purposes in airway management. A nasal cannula delivers supplemental oxygen but does not provide ventilation. An endotracheal tube is utilized for securing the airway and is more invasive, typically used in advanced airway management, particularly in cases requiring intubation. An oropharyngeal airway is used to maintain airway patency but does not assist with ventilation on its own. Thus, the BVM is specifically designed to facilitate ventilation, making it the correct choice for this scenario.