What is the highest flow rate for a nasal cannula?

The highest flow rate for a nasal cannula is typically considered to be 6 liters per minute. This flow rate allows for the delivery of supplemental oxygen while still being comfortable for the patient. At flow rates above this level, the cannula may not be as effective and can lead to discomfort or drying of the nasal passages.

Flow rates higher than 6 liters per minute may increase the risk of nasal mucosa irritation, and it is generally recommended to use other forms of oxygen delivery, such as a simple mask or non-rebreather mask, for higher oxygen needs. Therefore, while the nasal cannula can deliver adequate oxygen to patients at lower flow rates, 6 liters per minute is the maximum recommended for effective and safe use in the clinical setting.