An implantable port is a thin, soft, hollow tube made of plastic. It’s put into a vein in your chest or arm. Implantable ports are sometimes called portacaths or subcutaneous ports.
It has an opening just under the skin. This is called the port. The port is a disc about 2.5–4cm (1–1.5in) in diameter.
It can be used to give chemotherapy or medicine into your vein, or to take blood.
The tube is usually put in (tunnelled) under the skin of your chest or sometimes in your arm. One end of the tube goes into a large vein just above your heart. The other end connects with the port. This goes under the skin on your upper chest or arm. You'll be able to see and feel a small bump underneath your skin.