A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/130, 128/81.
A61M 5/00 (2006.01)
Patent
CA 1144836
ABSTRACT A totally subcutaneous implant for use with an apparatus providing an extracorporeal blood flow path extending from a blood withdrawing percutaneous cannula cooperable with said im- plant to a blood returning percutaneous cannula cooperable with said implant. In this novel implant, a body of elastomeric material is adapted to be implanted totally subcutaneously in a femoral extremity and means are provided in said body defining an arterial passage, a spaced venous passage, and a bypass conduit extending from one end of said arterial passage to one end of said venous passage. Arterial and venous tubes of vascular prosthesis material each having one end connected in communica- ting relation with the other end of the respective venous or arterial passage and an opposite end is adapted to be connected with a main femoral vein or artery side wall in communicating relation with the interior of the femoral artery. Blood with- drawing and returning percutaneous cannula receiving means in said elastomeric body extend from positions exterior of said elastomeric body inwardly thereof to positions in communicating relation with said arterial and venous passages, respectively, each such cannula means being movable between (1) a closed condition excluding fluid containing space within said body between said positions so that blood flowing from said arterial tube through said arterial passage will pass therefrom through said bypass conduit into said venous passage and out of said venous tube and blood flowing from said bypass conduit will pass therefrom into said venous passage and out of said venous tube and (2) an open condition excluding fluid receiving space within said body from the exterior periphery of the portion of a blood withdrawing or returning cannula extending between said two positions which also extends percutaneously and in communicating relation respectively with said arterial passage so that blood flowing from said arterial tube through said arterial passage will flow through said blood withdrawing cannula and said bypass conduit and with the venous passage so that said venous passage will receive blood flowing both from said blood returning cannula and said bypass conduit. The totally subcutaneous implant alleviates the problems of infection and blood-clotting which can arise in the use of exteriorized shunts for connecting the extracorporeal blood flow circuit with the blood system of the patient.
399705
Borden Ladner Gervais Llp
Research Against Cancer Inc.
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