What oxygen delivery device provides the highest concentration of oxygen?

The non-rebreather mask is designed to deliver the highest concentration of oxygen among commonly used oxygen delivery devices. It features a reservoir bag and special one-way valves that prevent exhaled air from entering the bag. When properly fitted and used, the non-rebreather mask can deliver oxygen concentrations of up to 90-100%. This is particularly crucial for patients in respiratory distress or those requiring high-flow oxygen due to conditions such as severe hypoxia.

The effectiveness of the non-rebreather mask stems from its ability to provide a tight seal around the patient’s face, minimizing the amount of room air that can mix with the oxygen being delivered. Additionally, the reservoir bag allows for a sufficient supply of oxygen during inhalation, ensuring that the patient receives a concentrated dose.

Other devices, like the simple face mask and nasal cannula, offer lower concentrations of oxygen, making them suitable for less critical cases where high levels of oxygen are not necessary. The bag-valve-mask can provide high concentrations as well, but the non-rebreather mask is typically the first choice for maximizing oxygen delivery in emergency situations.