The criteria for the success of cardiopulmonary resuscitation (CPR) operations mainly lie in two aspects: the standardization of the operation and the effect of resuscitation. First of all, the position of external chest compression must be accurate. The compression point should be on the lower half of the sternum at the midpoint of the line connecting the two nipples, ensuring that the compression depth is between 5 and 6 centimeters and the frequency is maintained at 100 to 120 times per minute. At the same time, it is necessary to ensure that the thorax fully reels to maintain effective blood circulation. When performing artificial respiration, it is necessary to ensure that the airway is unobstructed. When blowing air mouth-to-mouth or with the aid of a simple respirator, the chest should rise and fall significantly to avoid air leakage and hyperventilation. The ratio of compression to ventilation should be 30:2 to ensure continuous and effective circulatory support.

Secondly, the core criterion for determining the success of resuscitation is the patient's recovery of spontaneous circulation (ROSC). This includes the resumption of heartbeat, the appearance of palpable carotid or femoral artery beats, an increase in blood pressure, and the patient gradually regaining spontaneous breathing. With effective compression, the patient's pupils gradually constrict, the skin color turns rosy, and the blood oxygen saturation rises, all of which are signs of good resuscitation results.

Finally, during the operation process, common mistakes should also be avoided, such as pressing too shallowly, too slowly, missing presses or insufficient ventilation, etc. Only under the premise of standardized operation and in combination with effective improvement of physiological indicators can the success of cardiopulmonary resuscitation be determined.