Once breathing stops for more than five to eight minutes, irreversible damage occurs to the body’s major organs and tissues due to lack of oxygen. With the current medical treatment, there is basically no way back. In the past, people often used “stopped breathing” as a euphemism for the departure of a life. Although this expression is inaccurate, it reflects the importance of breathing to life. Respiratory obstruction is an internal medicine emergency, due to the lack of rescue conditions and technical means, many patients with respiratory obstruction run back and forth, delayed treatment and even life-threatening. When it comes to breathing, people immediately think of the lungs. In fact, this understanding is not comprehensive. Because a complete respiratory process, including ventilation and ventilation. The former refers to the process of gas in and out of the body, and the latter refers to the process of exchanging the oxygen that enters the body and the gas components dissolved in the blood. While the lungs are primarily involved in the process of gas exchange, the mainstay of the ventilation process is the airways and associated muscle groups. The former resembles a conveyor belt, while the latter resembles the motor that powers the belt. Typically, an adult’s respiratory rate is about 16-18 breaths per minute when calm, with women breathing 1-2 breaths faster than men and children breathing more than 20 breaths per minute. Fast or slow respiration indicates that the body may be in an abnormal state, the former suggesting that the body may be lacking in oxygen, the latter in many cases reflecting a problem with the central system that regulates respiration. Life activity is a continuous process. Therefore, the respiratory movement, which provides oxygen and releases the associated waste products for life’s activities, must also be a continuous process. Although in extreme cases life can briefly tolerate the onset of respiratory arrest, this time cannot exceed five to eight minutes, and once this time is exceeded, irreversible damage to the body’s major organ tissues occurs as a result of oxygen deprivation. With existing medical treatments, there is basically nothing that can be done back. In this sense, the respiratory tract as the main channel for transporting gases in and out of the body is like a “traffic lane” of life, which should be kept open at all times. If a “traffic jam” occurs, it must be cleared immediately. The respiratory tract is the channel that carries airflow when a person breathes, and its opening is in the nose, ending in the alveoli. Medically, it is divided into upper and lower parts, of which the nose, pharynx and larynx are collectively known as the upper respiratory tract. The trachea and its after a sub-division of the tube, collectively referred to as the lower respiratory tract, including trachea, bronchial tubes, lobe bronchial tubes, segmental bronchial tubes, fine bronchial tubes, terminal bronchial tubes, respiratory bronchioles, alveolar tubes, alveolar sacs and so on. Between one level and another, it is like a branch of a tree that is constantly bifurcating. Therefore, the trachea and its branches are also known as the tracheal tree. Don’t underestimate the tracheal tree, it is through this constant bifurcation that the number of lower bronchial tubes grows geometrically. This ensures, on the one hand, that the airways are spread throughout the lungs in terms of number, and on the other hand, that the terminal bronchi and alveoli have a sufficient area for gas exchange. According to calculations, the surface area of all the alveoli of an adult has a total of 50-60 square meters when breathing normally; when breathing deeply, the surface area will reach about 100 square meters. This is larger than the living area of an average family. It can be seen that the trachea and its branches are the main body of the respiratory tract. The role of the upper respiratory tract is more of a protection for the lower respiratory tract. Therefore, in emergency situations, doctors avoid the upper respiratory tract by means of tracheal intubation or tracheotomy and connect the lower respiratory tract directly to the outside world in order to maintain stable ventilation.