The first time we entered someone’s operating room, we were asked to get a flu shot before entering the operating room, not at the hospital, but at the CVS in the community, where the doctors knew we were studying. First of all, when we entered the operating room in our home hospital, we were asked to change our shoes at the entrance of the operating room, usually the slippers provided by the operating room, but also our own fixed slippers, and then we entered the locker room to change our hand clothes to enter the operating room, and we were never allowed to wear our own white coats into the operating area. But in the United States, we all wear our own leather shoes into the operating room area, and put on a mask and hat before entering the operating room room, and doctors can wear white coats into the operating room area, and take them off before entering the operating room room, so you can often see a lot of doctors’ white coats hanging in front of the operating room room, and I also see a lot of nurses carrying their own bags into the operating area, but put them in front of the operating room room. In other words, the focus of their aseptic requirements is the operating room room, there is no aseptic requirements outside the operating room room area, even in the third operating room opposite the door is the bathroom, doctors and nurses can urinate and defecate in it, which is unimaginable in China. All operating rooms are laminar air flow, which may be the guarantee of their concept of sterility, that is, they feel that the sterility requirement is to ensure that the patient’s incision is as little as possible to be entered by bacteria, the airtightness of the operating room, laminar air flow, items that may come into contact with the patient’s incision are absolutely sterile, all invasive operations are absolutely sterile, even tracheal intubation, deep vein puncture, arterial puncture, etc. are to wear sterile surgical All invasive operations are absolutely sterile. Surgeons wear surgical gowns after all the nurses help to put on gloves, generally hands are not exposed outside the cuffs, because the doctor’s hands may be germ-bearing. They pay special attention to hand contamination and require doctors and nurses to wash their hands with hand sanitizer before entering and leaving the operating room. After a surgery, they usually enter 5-6 nurses to clean the operating room, and they use sterilized rags to apply all the items in the operating room to ensure it is clean. To sum up, their concept of sterility is to ensure that the last link that touches the patient’s incision is thoroughly sterile, including the laminar flow air in the operating room, the sterility of the doctor’s and nurse’s hands, the sterility of the anesthesiologist’s operation, and the sterility of all items that touch the incision; and this last link is not necessarily related to the whole surgical area, the doctor’s shoes, the bathroom in the operating room, etc., so there is no requirement.