1) Select the appropriate mask size for the patient;

2) Take out the anesthesia mask from the packaging bag, align the bottom of the mask with the back of the patient's lower lip, and gently buckle the anesthesia mask to cover the patient's mouth and nose;

3) Fasten the mask with the thumb, index finger and middle finger, and lift the chin of the patient with the remaining fingers if necessary;

4) There is no need to press the mask downward to ensure the sealing: the material of the edge part and the design that conforms to the anatomy of the human face ensure that the sealing can be achieved with the minimum pressure, and finally the mask is fixed to the patient's face with a fixing belt.