The most frequently talked about topic before surgery is the “risk of surgery”. Many patients, or their families, ask this question: Are there any risks associated with surgery? How big are the risks? Does a better doctor or a bigger hospital have less risk? In fact, the size of risk can only be relative, and risk exists everywhere. The question of surgical risk, or medical risk. Is it true that the risk of surgery is less when you go to a higher level hospital? It is not an appropriate analogy, because the factors that affect the risk of surgery are many, that is, there are many factors that affect the width and height ratio, making it difficult for doctors to give a definite ratio (or risk probability) We can use such a formula to think: Surgical risk = 1/(doctor’s experience x equipment x doctor’s responsibility x patient’s physical condition x other) x 100% here is definitely not to popularize mathematical knowledge or to come up with a certain law, so you do not have to think about the perfection of this formula, here just for the convenience of the narrative. The greater the number of factors in the denominator, the smaller the risk of surgery. Both doctors and patients want the denominator to be larger, preferably infinitely large, but not every item can be increased at will, and no matter how to increase the denominator, mathematically speaking, the risk of surgery cannot be 0. The experience of doctors is not necessarily proportional to the time spent in practice, especially surgeons. Nowadays, with the continuous subdivision of medical disciplines, doctors are more and more specialized, in one aspect can be a master, but it means sacrificing some energy on the other side, which is similar to the human stomach, you choose to eat meat, the food will not hold much, anyway, the stomach capacity is so big. Therefore it is obviously important to choose the right doctor, and it is also vital that the doctor choose the right indications for the surgery. This is the case, especially to large general hospitals, where the strength of the doctor’s expertise is more prominent. Doctor responsibility is currently the most criticized by the people, not to elaborate, both sides of the brick words can not be said, but inevitable, this is a factor that affects the risk of surgery. The patient’s physical condition is something that must be taken seriously, and many patients and family members have the understanding that, “Oh, my God, it’s a good thing he’s young and strong, he recovered so quickly. Other factors include: the trust and pressure from the family (the two create opposite psychological feelings for the doctor); the fatigue and psychological state of the doctor; the comfort of the surgical environment; etc. These complex factors need to be well integrated and coordinated in a very short period of time in order to truly expand the denominator and reduce the score: surgical risk. Otherwise, the denominator is still not large enough. If the above factors are well integrated and coordinated, the risk can be controlled to a relatively low level even in small and medium-sized hospitals. Therefore, it is important to face the fact that the risk of surgery is objective and its magnitude can only be viewed in a relative manner. Specifically, when a patient comes to a certain doctor in a certain hospital, in the denominator value of the above formula, in fact, except for the doctor’s responsibility and the patient’s trust in the doctor are adjustable factors, the others are basically not optional, so it is wise for both doctors and patients to work together as much as possible to expand several indicators in the denominator in order to truly reduce medical risks.