Part of a venous access device consisting of a subcutaneously implanted port through which medications are injected. Leading from the port is a catheter that is inserted in the cephalic, jugular, or subclavian vein. The catheter extends into the superior vena cava. The port has a self-sealing septum through which a needle is inserted to have access for administering medications, such as cancer chemotherapy agents, and for drawing blood samples. The septum of the port is made to withstand from 1000 to 2000 punctures depending on the size needle used. Sterile technique is used each time a needle enters the port. The port permits unrestricted patient activity. Each time it is used care must be taken to be certain the line is open and that the catheter in the vein has remained in the proper position.