An implantable device grafted directly to vascular structures for high volume blood and/or fluid infusion and/or removal for such purpose as hemodialysis, apheresis, exchange transfusion, or large volume fluid infusion. The device is also adaptable to intermittent access to the venous or arterial circulations...http://www.google.fr/patents/US6056717?utm_source=gb-gplus-shareBrevet US6056717 - Implantable vascular device
