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Once someone goes into shock or starts choking, the first reaction is to perform cardiopulmonary resuscitation!

Cardiopulmonary resuscitation is a general term; its full name should be "cardiopulmonary cerebral resuscitation," aiming to help the person in shock restore spontaneous heartbeat and breathing through external means.

Generally speaking, cardiopulmonary resuscitation consists of several steps, colloquially known as A, B, C. Of course, there are also D and E, but D and E refer to medicinal resuscitation in the hospital, which we won't discuss here.

The so-called A stands for airway, meaning to establish an open airway. When a person has lost their heartbeat and stopped breathing, the first task is to ensure that breathing can be restored smoothly. At this point, if there is a foreign object in the patient's mouth, it needs to be removed to maintain an unobstructed airway.