What is the maximum flow rate for a nasal cannula?

The maximum flow rate for a nasal cannula is typically recognized as being in the range of 4 to 6 liters per minute. At this flow rate, the nasal cannula can effectively deliver supplemental oxygen to patients who require assistance in breathing or have low oxygen saturation levels. This range is optimal because it allows for increased oxygen concentration to be delivered without causing discomfort or complications associated with higher flow rates.

Higher flow rates can lead to dryness in the nasal passages and may also exceed the patient's capacity to effectively utilize the oxygen being delivered. Thus, while the nasal cannula can sometimes be used at higher flow rates, the standard and most comfortable limit typically cited for effective therapy remains within this 4 to 6 liters per minute range.