During many lectures on the principles and practice of CPR, the physics of the Venturi effect, which is the flow of air through the trachea during mouth-to-mouth resuscitation, was explained in detail, and the concept of the Sellick maneuver was introduced to prevent the airflow from entering the esophagus. Later, during the CPR simulator training, the inspiration came to me and the modified Sellick maneuver was born. The accumulation of daily work and the deep exploration of pathophysiological mechanisms are the source of inspiration. God always favors the prepared mind, and we should always be ready. Some people study the most active time of inspiration is mainly two, one is before going to sleep, when it will be quick thinking, thoughts like flying; the other is sitting on the toilet, when it will also produce a lot of inspiration; so, should be widely promoted the use of sitting toilet, less squatting toilet, the latter is more painful, may not be conducive to the generation of inspiration. In addition, in the bed and toilet to prepare paper and ink, in order to facilitate the timely recording of inspiration, may also be a good suggestion. Remember the old saying “a flash of inspiration”, inspiration is fleeting, do not record it in time, very block will forget. The so-called modified Sellick maneuver refers to the cardiopulmonary resuscitation (CPR), the operator in pushing the forehead to lift the chin to open the airway after the mouth-to-mouth artificial respiration at the same time, the right hand pinky metacarpophalangeal joint in the cricoid cartilage pressure, can significantly reduce the mouth-to-mouth artificial respiration gas and gastric contents reflux caused by aspiration pneumonia. This artificial respiration combined with the traditional Sellick maneuver, that is, the modified Sellick maneuver, has greater practical value in clinical practice. I. Traditional Sellick maneuver Mouth-to-mouth artificial respiration was invented by Peter Safar in 1958, and it is a basic operation method widely used in CPR. However, the endotracheal airflow generated during mouth-to-mouth artificial respiration can cause the trachea to retract (Venturi effect), causing the adjoining esophagus to open up, causing some of the gas to enter the stomach through the esophagus, resulting in gastric distention; the latter not only affects the effect of chest cardiac compressions, but also can cause aspiration pneumonia when a large amount of gas and contents of the stomach return into the oropharynx during chest compressions. To prevent gastric distension and aspiration pneumonia, the following improvements have been made to CPR recently: 1. The blowing speed of mouth-to-mouth artificial respiration is reduced from rapid blowing in the past to slow blowing (1.5-2.0 seconds/time) to reduce the Venturi effect. 2. The Sellick maneuver (Sellick maneuver) commonly used during tracheal intubation for anesthesia is transplanted to CPR: that is, pressure is applied in front of the cricoid cartilage (with the thumb and index finger) so that the cricoid cartilage moves backward to compress the posterior esophagus and stop the regurgitation of gastric contents into the oropharynx. However, there are two problems in the application of Sellick maneuver in CPR: 1, two people need to operate at the same time to complete the operation, one person performs mouth-to-mouth artificial respiration, and the other person compresses the cricoid cartilage and does Sellick maneuver. 2, because the thumb and index finger directly compress the cricoid cartilage, the compression force is not easy to control, when the force is too large, the trachea can be flattened, resulting in airway obstruction. Second, the modified Sellick maneuver I invented the modified Sellick maneuver is to open the airway (airway, A) in CPR by pushing the forehead and lifting the chin, and then apply pressure on the cricoid cartilage (Sellick maneuver) with the metacarpophalangeal joint of the right pinky finger, and perform mouth-to-mouth artificial respiration (breathing, B) at the same time. Manipulation. The advantages of the modified Sellick maneuver are: 1. The organic combination of mouth-to-mouth respiration and compression of the cricoid cartilage can be completed by one person, and the maneuver is smooth. 2. Since the cricoid cartilage is compressed at the metacarpophalangeal joint of the little finger, the force is not too large, which is less likely to cause airway obstruction. In conclusion, the modified Sellick maneuver is an organic combination of artificial respiration and the traditional Sellick maneuver, which has greater practical value.