An implanted port, also known as a port-a-cath, is a small medical device that is surgically placed under the skin, typically in the chest, to provide easy access to a vein. It consists of a reservoir connected to a central venous catheter that is inserted into a large vein. Implanted ports are commonly used for patients requiring long-term intravenous therapy, such as chemotherapy, antibiotics, or total parenteral nutrition.