Adult oral-to-mouth artificial respiration is usually divided into three cases: 1. When the patient is completely unconscious and the patient needs to get a heart rate through extracardiac compressions and involuntary breathing through artificial respiration, artificial respiration must be given according to the frequency of compressions and ventilation of 30:2, with 30 compressions and 2 artificial respirations given at 100-120 compressions per minute. 2. When the patient has a spontaneous heart rhythm, but the breathing is very weak, the artificial respiration is given 10-12 times per minute. 3, when the patient has been intubated through the mouth, artificial respiration needs to be given through the human pinch ball, if the artificial respiration is given through the pinch ball, the frequency is usually given 10 times per minute.