There is a story that says: a patient who just came off the operating table, holding the surgeon’s hand excitedly said: doctor your medical skills are really brilliant, the operation is really good, I do not hurt at all! The surgeon did not deny it. In fact, the patient was wrong. The person who made him painless was not the surgeon, but the anesthesiologist. The anesthesiologist is not only responsible for making the patient undergo surgery without pain, but also for monitoring the patient’s blood pressure, heart rate, respiration, oxygen saturation and other indicators during the operation, and the anesthesiologist is also responsible for blood and fluid transfusion during the operation. That is why some people say that anesthesia is life-saving and surgery is a cure. Do you think anesthesia is important? The purpose of anesthesia is to provide good conditions for surgery, and there are many types of anesthesia around this topic, including general anesthesia, intravertebral anesthesia, regional nerve block, and so on. For example, if a patient has an upper arm fracture in a car accident, a simple fracture of the humerus can be done with a brachial plexus block. However, some hospitals do not use brachial plexus (especially large hospitals) or the anesthesiologist on duty does not know how to use brachial plexus, so general anesthesia can be chosen. The choice of anesthesia sometimes depends on the availability of the anesthesiologist. To provide good conditions for surgery also thought of many ways such as: double-lumen tracheal tube and blocker that allows isolation of the left and right lungs, critical or controlled hypotensive patients, to have arterial puncture placement and controlled hypotension. Central venous catheter placement for rapid blood replacement, fluid replacement and high ion input if necessary. These are all part of the anesthesiologist’s job, and it takes a long time to prepare for these tasks each day. The anesthesiologist usually visits the patient’s ward the day before the procedure (sometimes with the help of an assistant or teaching student) to understand the condition, plan the anesthesia, and prepare the anesthetic instruments and drugs. General anesthesia is the most widely used form of anesthesia today. The patient is completely anesthetized – unconscious, pain-free, and with relaxed muscles. The patient is comfortable and the surgeon is comfortable. General anesthesia also has many complications, such as the possibility of damage to the soft tissues of the oral mucosa and teeth during tracheal intubation. Nowadays, a laryngeal mask can be used instead of intubation. General anesthesia may also delay awakening and so on. Most of these complications can be avoided by experienced anesthesiologists to reduce the incidence of the latter. With the development of anesthesia disciplines, anesthesia is subdivided into pediatric anesthesia, cardiovascular anesthesia, neurosurgery anesthesia, obstetrics anesthesia, etc. Large hospitals are also grouped according to these subdisciplines, and each anesthesiologist has a specialized focus. A good anesthesiologist has a positive effect on patient prognosis and vice versa.