What type of device is used to deliver more than 90% supplemental oxygen?

The correct choice is the non-rebreather mask, which is specifically designed to deliver high concentrations of oxygen to patients. This device is equipped with a one-way valve that allows exhaled air to escape while preventing room air from entering, ensuring that the patient receives nearly pure oxygen—typically over 90%—from the oxygen supply connected to it.

In emergency situations where patients exhibit significant respiratory distress or require high-flow oxygen for conditions like severe hypoxia, the use of a non-rebreather mask is crucial. Its design allows for efficient oxygen delivery during critical interventions.

While an oxygen mask can provide supplemental oxygen, it does not achieve the same concentration levels as a non-rebreather mask due to potential mixture with ambient air. A bag-mask device is primarily utilized for ventilation rather than for delivering high concentrations of oxygen, although it can assist in achieving high oxygenation when used correctly. The CPR mask is aimed at providing a barrier for rescue breathing but does not deliver oxygen at effective concentrations when used alone.

Thus, the non-rebreather mask is the device of choice for ensuring that patients receive the maximum level of supplemental oxygen required in emergency scenarios.