Before a doctor performs surgery, he or she will use a green cloth to cover most of the patient's body. The cloth has a hole in it through which the surgeon will operate on the patient. The medical term for the cloth covering the patient's body is called a surgical hole towel, or sterile cloth, and its primary function is to ensure a stable sterile environment during surgery.

This is done mainly to prevent contamination and bacterial infection of the patient's wound during surgery by operating aseptically. Surgical procedures are most afraid of wound infections. By covering the rest of the patient in this way, leaving only the surgical area, the probability of infection can be greatly reduced. This requires that doctors and nurses in the operating room must strictly follow the surgical procedure.

Surgery seems to be very sacred, even a piece of cloth has many many people curious, in that case, let us start from "a piece of cloth" to unveil the mystery of surgery.

Some surgeries do not require general anesthesia, but only semi-anesthesia, such as appendicitis surgery, the patient can also be awake, but because the patient is very nervous, usually let the patient fall asleep, often encountered when the patient surgery snoring loudly, the doctor listened to the snoring, while operating.

Then, since it is not to prevent patients from peeking, then the only purpose of laying a green or blue cloth is for one reason: sterility. Surgery is a very, very strict procedure, but because surgery is also a trauma, need to cut a part of the body, as long as there is a wound, there is inevitably the possibility of bacterial infection.

Nowadays, the operating rooms are very advanced, basically laminar flow operating rooms, which try to eliminate the possibility of spreading pathogenic microorganisms from the air. Surgical instruments are also sterilized by high temperature and pressure or plasma, the doctor before surgery are also strictly clean hands up to the site above the bilateral elbow joints, but also wear sterile surgical gowns, masks, hats, sterile gloves, all these are to avoid bacterial infection through the surgical incision patient, although the doctor is very complete, surgical instruments are also strictly sterilized, but, if the patient that aspect of sterilization and aseptic do Not in place, everything is in vain.