How long can a nasal cannula deliver oxygen at a flow rate?

A nasal cannula is a device used to deliver supplemental oxygen to patients in a comfortable and non-invasive manner. The typical flow rate for oxygen delivered through a nasal cannula ranges from 2 to 6 liters per minute. At this flow rate, the nasal cannula can provide an effective concentration of oxygen to the patient, enhancing their oxygenation without the discomfort that can accompany higher flow rates or other forms of oxygen delivery.

When using a nasal cannula, it's essential to maintain appropriate flow rates to prevent discomfort and side effects which can arise from excessive drying of the nasal passages or other issues related to high oxygen levels. The specified range allows healthcare providers to titrate oxygen to meet individual patient needs while ensuring patient comfort and effectiveness of therapy.

Other options suggest flow rates that either exceed the capacity of a standard nasal cannula or fall below the necessary levels to provide adequate oxygenation, which can limit the device's effectiveness.