What is a drainage tube

Drainage tube is a medical device used for clinical surgical drainage to guide pus, blood and liquid accumulated between human tissues or body cavities to the outside of the body to prevent postoperative infection and promote wound healing. There are many types of surgical drainage tubes used clinically, some are used for catheterization, some are used for wounds, thoracic cavity, brain cavity, gastrointestinal tract, biliary tract and so on. The purpose of surgical drainage is to guide the pus, blood, and fluid accumulated between human tissues or body cavities to the outside of the body to prevent postoperative infection and affect wound healing.