An implantable port is a catheter with a small reservoir (port) attached to it. It can be used to give chemotherapy or medicine into your vein, or to take blood. Implantable ports are sometimes called portacaths or subcutaneous ports.
The catheter is a thin, soft, flexible tube made of silicone. It 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 to the port. The port is a small disc that goes under the skin on your upper chest or arm. You will be able to see and feel a small bump on your skin where the port is.