Which device is an example of a low-flow oxygen delivery system?

A nasal cannula is considered a low-flow oxygen delivery system because it allows for the administration of oxygen at a varying rate, typically between 1 to 6 liters per minute. This delivery method is designed to supplement the patient's natural breathing, providing a lower concentration of oxygen that is suitable for patients who do not require high levels of supplemental oxygen.

Other devices, such as simple masks, nonrebreathing masks, and partial rebreathing masks, typically deliver higher concentrations of oxygen. A simple mask can provide more oxygen than a nasal cannula but still falls under the low-flow category. However, nonrebreathing masks are considered higher-flow systems as they can deliver oxygen concentrations closer to 100%. Similarly, partial rebreathing masks also provide higher concentrations of oxygen and are more suited for patients in more acute distress.

In contrast, the nasal cannula's ability to deliver oxygen at a lower flow rate makes it ideal for patients with less severe oxygenation needs while still allowing them to speak and eat, enhancing comfort and usability. This is why the nasal cannula is correctly identified as a low-flow oxygen delivery system.