Psychiatric Technician Practice Exam

What is the highest flow rate of a nasal cannula?

1. 2 Liters/minute

2. 4 Liters/minute

3. 6 Liters/minute

4. 10 Liters/minute

The correct answer is: 6 Liters/minute

The highest flow rate of a nasal cannula is typically considered to be 6 liters per minute. At this rate, it can deliver adequate oxygen concentrations for patients who require supplemental oxygen, particularly in cases of mild to moderate respiratory distress. Using flow rates of up to 6 liters per minute generally allows for a comfortable delivery of oxygen while maintaining effective dispersion in the nasal passages, which helps to avoid discomfort that might arise from higher flow rates. Flow rates above this limit can lead to drying of the nasal mucosa and may result in discomfort or the need for additional humidification to provide a comfortable experience for the patient. It's important to note that while flow rates can be adjusted based on individual patient needs, exceeding the typical maximum of 6 liters per minute often requires alternative delivery methods, such as a face mask or other devices, to ensure adequate oxygenation and patient comfort.