The time to remove the infusion port is usually six months to one year, depending on the prophylactic chemotherapy, continuous chemotherapy, and whether or not there has been thrombosis. 1. Prophylactic chemotherapy: the fixed cycle of chemotherapy is 4~8 cycles, one cycle is about 21 days, and the port can be removed after the chemotherapy is finished. 2. Continuous chemotherapy: for example, when a certain cancer is in the advanced stage and requires continuous use of chemotherapeutic drugs or other medications, in order to facilitate the use of medications and to prevent the damage of chemotherapeutic drugs to the muscles, skin, and blood vessels, the port can exist for a long time, and it is necessary to maintain the port on a regular basis. 3. Suspected or already have blood clots: wear infusion port for a long time, if suspected or already formed blood clots should be removed from the infusion port. Patients should use the infusion port or remove the infusion port under the guidance of the physician, and patients should not act on their own to avoid adverse results.