Wash your hands, prepare what you need, and check repeatedly to make sure it is in use.
Check the date of the oxygen inhalation tube, check for leaks, connect the oxygen inhalation tube and the humidification bottle, and connect them firmly, turn on the oxygen switch, and adjust the oxygen flow. Connect the oxygen tube and the mask to ensure that the connection is tight and will not fall off.
After adjusting the flow rate, cover the mouth and nose with the oxygen mask and adjust the tightness. Record oxygen time and oxygen flow in time. Observe the oxygen inhalation status, and close it in time if there is any abnormal status.
When the oxygen time is reached, close it in time, remove the mask, turn off the flow meter, record the time when oxygen is disabled, and wash hands.