What is the most appropriate oxygen delivery device for an unresponsive individual who is gasping?

The most appropriate oxygen delivery device for an unresponsive individual who is gasping is a CPR mask with an oxygen inlet. This device allows rescuers to provide emergency breaths effectively while also delivering supplemental oxygen. The CPR mask is designed to create a seal around the person's mouth and nose, minimizing the loss of exhaled air and ensuring that the delivered breaths are effective. The inclusion of an oxygen inlet enables the rescuer to attach an oxygen source to provide higher concentrations of oxygen, which is crucial in a situation where the individual is unresponsive and gasping.

In contrast, other options may not provide the same level of effectiveness for someone in this critical condition. A nasal cannula is typically used for patients who are alert and can breathe on their own; it is not effective for an unresponsive individual. A simple face mask also delivers oxygen but does not provide the same secure seal as a CPR mask, which is essential during rescue breaths. A non-rebreather mask is excellent for providing a high concentration of oxygen, but it is not specifically designed for the delivery of breaths by a rescuer and may not be as manageable during CPR as the CPR mask with an oxygen inlet.