Even if there is no sign of infection, the drainage tip and drainage can be cultivated by culturing the drainage and the drainage tip in advance. It is considered to be a very natural response to try to respond by knowing the information as soon as possible. On the other hand, the diagnostic value of such a uniform drain tip culture has been debated, and since the examination requires cost and time, research is being conducted to review its significance. A meta–analysis concluded that it had no effect on predicting SSI. Furthermore, the guidelines published by the Japanese Society for Surgical Infection also state that drain placement itself is not necessary for many surgical procedures, and the premise of discussion is broken. Drains are needed, and difficult surgical cases where drain management holds the fate of patients will not disappear, and proper drain management is important now and in the future.
