A device for a traumatic access to a blood vessel of a living organism through the cutaneous surface thereof. The device includes in combination an implantable device comprising a tubular segment for access to the blood vessel; a valving element for the tubular segment; a mechanism for controlling the...http://www.google.ca/patents/US4654033?utm_source=gb-gplus-sharePatent US4654033 - Device for atraumatic access to the blood circuit
