Abstract: A artificial blood vessel for facilitating the introduction of fluids into or withdrawal of fluids from the vascular system of an individual, or both, includes a tubular portion that lies beneath skin of the individual and is grafted to a natural blood vessel. Located along the tubular portion where it is offset laterally from the tubular portion is at least one pocket which encloses a chamber that communicates with the lumen of the tubular portion. The artificial blood vessel also includes a port which is attached to the pocket and has grommet that lies over the skin and contains access bore. The port also has a valve which lies at the end of the access bore to normally prevent blood from escaping through the access bore, but does allow access to the chamber for medical procedures.