If the device is working properly, try placing the nasal cannula in water and observing for bubbles. If there are bubbles, the device is working properly. After the nasal cannula enters the nose, the nose will not feel much pressure due to the low flow rate of 450ml of hydrogen and oxygen gas. In fact, it is higher than the human system. The normal nasal cavity can sense the pressure of hydrogen and oxygen gas at a flow rate of at least 1500ml/min to have a noticeable sensation.
By vevor
