What is the correct method of oxygen intake

The correct method of oxygen inhalation includes the steps of pre-use preparation, device connection, adjustment of oxygen flow and mask oxygenation.
Oxygen inhalation is a commonly used treatment method in clinic, before using, we should firstly prepare the humidifier, oxygen inhalation tube, flow meter, etc., and at the same time, we should check whether the equipment is intact or not, check whether there is any abnormality in the oxygen flow rate, whether there is any breakage of the humidifier, etc.; after checking the device is connected, connect the oxygen tube with the nasal catheter or the mask, open the oxygen valve and the flow meter, and test whether the oxygen is normal or not.
After everything is normal, start to adjust the oxygen flow rate, generally the oxygen flow rate needs to be adjusted at 2~3L per minute, and then give the nasal conduit or mask to the patient to inhale oxygen, if there is any discomfort need to be adjusted or withdrawn in time.