Implantable intravenous drug delivery system (VIAS), referred to as infusion port, chemotherapy pump (Port). The implantable intravenous drug delivery system began in the early 1970s and has been widely used in clinical practice overseas, gaining a wealth of experience. In the United States, the use rate of implantable intravenous drug delivery system for chemotherapy has reached 50.3%. In China, less than 5% of this technology is being used. Implantable intravenous drug delivery system is the latest technology of clinical intravenous infusion system in recent years, which is the permanent access to chemotherapy. It is a closed intravenous infusion system that can be completely implanted in the body, and an infusion pump is connected to the implanted tube and buried under the skin after the central venous cannula, which has the advantages of infection, obstruction, reduced chance of thrombosis and long service life compared with the widely used external central venous catheter, It can reduce the pain and difficulty of repeated venipuncture, prevent the damage of irritating drugs to peripheral veins, and the patient’s daily life is not restricted, no need to change drugs, and can take a bath, which greatly improves their quality of life. It also solves the difficulty of skin allergy caused by the patient’s puncture point dressing, and the implantable infusion port should be flushed once a month during the non-therapeutic period, which makes up for the shortcomings of central venous placement and central venous placement via peripheral venous puncture. From an economic point of view, although implantable IV delivery systems are more expensive for a one-time implantation, they can be used by patients for at least 10 years after implantation, and flushing is sufficient every 4 weeks during inter-treatment periods. This is not only safer and more durable than conventional chemotherapy (up to one year and flushing every 7 days between treatments), with fewer complications, but also significantly reduces nursing care and increases ward turnover.