The anesthesiologist’s position in surgery is very important, in addition to pre-anesthesia evaluation and administration of anesthesia for the patient before the start of the operation, while the surgeon is performing the operation, he must also be responsible for dealing with the physiological reactions of the patient due to the anesthesia and the operation, and to maintain the patient’s basic vital functions in anesthesia, such as heartbeat, respiration, blood circulation and oxygen delivery and other important functions; in addition, he must also In addition, it is necessary to pay attention to whether the depth of anesthesia is appropriate for the patient, to prevent and urgently deal with any abnormalities that may occur during the anesthesia, so as to avoid the occurrence of complications and serious after-effects. The responsibility of anesthesiologists is not over until the operation is over and the patient is safely and completely out of anesthesia. Generally speaking, the effects of anesthesia on the body, such as slowing down of breathing and heartbeat, lowering of blood pressure, or headache and nausea, will return to normal after the effects of anesthesia have completely worn off. Because each person’s physical and health conditions will affect the effectiveness of anesthetics, therefore, before administering anesthesia, hospitals will generally ask patients to fill out information including personal and family history of special diseases, whether they have tobacco, alcohol, drug addiction, etc., so that physicians can fully understand the overall physical condition of the patient, and customize a set of anesthesia plan for the whole process that belongs to him or her, including medications, dosage, administration methods, and monitoring and assistance under anesthesia. This includes medication, dosage, administration, and monitoring and assistance during anesthesia. Therefore, before undergoing anesthesia, it is absolutely necessary to carefully discuss your physical condition with your anesthesiologist. Because anesthesiologists have the ability to save patients’ lives in critical situations, they are not only important figures in the operating room, but also the main force in emergency care and in many intensive care units and intensive care units. On the other hand, because anesthesiologists know very well the operation mode of the human body’s nervous system, they are also experts in dealing with all kinds of pain. From labor pain, acute pain from surgery, to chronic pain in the body, from behind the scenes to the front of the treatment, anesthesiologists, the role of pain experts, can be said to be “all the way, always the same”. “The purpose of anesthesia is to take care of the patient’s comfort and safety during surgery. According to the scope of anesthesia and the “class” of nerves involved, there are three types of anesthesia: local, regional, and general. Local anesthesia is simpler and safer, and is suitable for small local surgeries, such as wound suturing, small liposuction, or breast sectioning. Regional anesthesia, on the other hand, is used to anesthetize a larger area of the body, such as the entire arm or the entire lower body, with the principle of nerve blocking. The technique of general anesthesia has contributed greatly to the advancement of modern surgical techniques. General anesthesia is necessary for many special parts or large-scale surgeries, such as open heart surgery, liver surgery, heart-lung transplantation, head surgery, and so on. General anesthesia, as the name suggests, of course means that the whole person will lose all consciousness and sensation, and even stop breathing, at this time, it is necessary to be assisted by human beings and rely on the anesthesiologist’s whole process of guarding and monitoring. With the advancement of medical technology, there have been breakthroughs in many difficult surgical procedures that were considered impossible in the past, such as splitting Siamese twins and heart-lung transplants. In fact, behind these successes, the biggest behind-the-scenes contributor is anesthesia. Anesthesia plays a very important role in heart transplantation surgery, as well as in the suturing of superficial wounds, which should not be done carelessly. Therefore, it is not too much to say that “without anesthesia, there would be no surgery”.