The Heimlich maneuver is known as the Heimlich abdominal shock. Acute airway blockage is not uncommon in life, and because the patient is unable to breathe after the blockage, it may lead to accidental death due to lack of oxygen. The Heimlich abdominal shock method, also known as the Heimlich maneuver, was invented by an American physician, Mr. Heimlich, who first applied the method in 1974 to successfully resuscitate a patient who was suffocating due to a food blockage in the airway, and since then the method has been widely used around the world, saving countless patients. Therefore, this method is called “the embrace of life”. 1, the principle of the human lung can be imagined as a balloon, the trachea is the balloon mouth, if the mouth is blocked by a foreign body, you can squeeze the balloon with your hand, the balloon is pressured to move the air inside the ball, so as to block the mouth of the foreign body flushed out, this is the physics of the Hay abdominal impact method. First-aiders around the patient, suddenly apply pressure to his upper abdomen, forcing his upper abdomen to sink, resulting in a sudden rise of the diaphragm, which will cause a sudden increase in the patient’s chest pressure, because the chest cavity is closed, only the trachea an opening, so the gas in the chest cavity (trachea and lungs) will naturally rush to the trachea under the action of pressure, each impact will produce 450 to 500 ml of gas, so that it is possible to foreign bodies It is possible to expel the foreign body and restore the patency of the airway. 2.Indications (1) Foreign body in the respiratory tract For the removal of foreign body in the respiratory tract, mainly for patients with complete or severe blockage of the respiratory tract. (3) Drowning patients For resuscitation of drowning patients to remove the fluid from their airways. (Note: Some people believe that the method does not expel enough water from the airway or lungs to help resuscitation, and may lead to gastroesophageal reflux causing aspiration pneumonia, while the use of the method may delay the time of cardiopulmonary resuscitation, which is not conducive to successful resuscitation, see the International Federation of American Red Cross and Red Crescent Societies 2011 guidelines for field first aid and cardiopulmonary resuscitation) 3, operation method The first responder first bow the front leg, rear leg Then make the patient sit on his or her bowed thighs and let his or her body lean forward slightly. Then the arms are stretched out from under the patient’s two armpits and encircle the patient. Left hand fist, the right hand from the front to hold the left wrist, so that the left fist tiger mouth in the patient’s chest below, above the navel in the middle of the upper abdomen, forming a “closed” position, and then suddenly tighten the arms, with the left fist tiger mouth to the patient’s upper abdomen in the upper violent pressure, forcing the upper abdomen sink. As the abdomen sinks, the abdominal cavity moves upward, forcing the diaphragm to rise and squeeze the lungs and bronchi, so that each impact can provide a certain amount of air for the airway, thus flushing the foreign body out of the trachea. Immediately after applying pressure, the arm is relaxed and then the procedure is repeated until the foreign body is expelled. In the case of acute airway foreign body obstruction, if no one is around, the patient can also perform abdominal shocks by themselves, using the same technique, or by pressing the upper abdomen against any hard, protruding object and repeating the procedure. For patients who are extremely obese or have a foreign body obstruction in late pregnancy, the chest shock method should be used, with the same posture, except that the tiger’s mouth of the left hand should be placed against the lower end of the patient’s sternum, taking care not to deviate from the sternum to avoid rib fractures. For patients who are unconscious, the first-aider can first make the patient become supine, then ride across the patient’s thighs or on either side of the patient, place both palms of both hands overlapping above the patient’s navel, and apply sudden pressure with the palm root forward and downward, repeatedly. If the patient has undergone cardiac arrest, the patient should be given CPR according to the routine steps of CPR at this time until the arrival of medical personnel. 4.Comorbidities and precautions Although the Hay’s shock method has certain effects, it may also bring certain hazards, especially for the elderly, because of the elasticity and poor compliance of the thoracic and abdominal tissues, so it is easy to lead to the occurrence of injuries, such as rupture, tearing and bleeding of the abdomen or thoracic viscera, rib fractures, etc. Therefore, when airway obstruction occurs, other methods should be used first to remove foreign bodies, and the method should be used only when other methods are ineffective and the patient The method should be used only when other methods are ineffective and the patient is in an emergency situation.