Cannula lined with tissue in-growth material and method of using the same
First Claim
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1. A cannula for moving blood between a pump and the circulatory system of a patient, the cannula comprising:
- a liner having a length and comprising an intermediate portion that extends for a majority of the length between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing through the lumen to thereby reduce thrombus formations along an inner blood contacting surface of the cannula, the proximal portion is configured for connecting to the pump and the distal portion is configured for connecting to the circulatory system;
a jacket fully encapsulating the liner; and
a continuous outer layer bonded to and surrounding the jacket and extending along a full length of the intermediate and distal portions of the liner, the outer layer constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing along an outer blood contacting surface of the cannula to thereby reduce thrombus formations along the outer blood contacting surface.
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Abstract
A cannula for moving fluids between a pump and the circulatory system of a patient. The cannula includes a liner having an intermediate portion between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions. At least the intermediate portion of the liner is constructed from a tissue in-growth material for supporting the growth of endothelial cells. A jacket surrounds at least part of the liner.
92 Citations
52 Claims
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1. A cannula for moving blood between a pump and the circulatory system of a patient, the cannula comprising:
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a liner having a length and comprising an intermediate portion that extends for a majority of the length between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing through the lumen to thereby reduce thrombus formations along an inner blood contacting surface of the cannula, the proximal portion is configured for connecting to the pump and the distal portion is configured for connecting to the circulatory system; a jacket fully encapsulating the liner; and a continuous outer layer bonded to and surrounding the jacket and extending along a full length of the intermediate and distal portions of the liner, the outer layer constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing along an outer blood contacting surface of the cannula to thereby reduce thrombus formations along the outer blood contacting surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A cannula for moving blood between a pump and the circulatory system of a patient, the cannula comprising:
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a liner having a length and comprising an intermediate portion that extends for a majority of the length between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing through the lumen to thereby reduce thrombus formations along an inner blood contacting surface of the cannula, the proximal portion is configured for connecting to the pump and the distal portion is configured for connecting to the circulatory system; a reinforcing structure surrounding at least a part of the intermediate portion of the liner for resisting kinks along the length of the cannula; a jacket surrounding the reinforcing structure and fully encapsulating the liner; and a continuous outer layer bonded to and surrounding the jacket and extending along a full length of the intermediate and distal portions of the liner, the outer layer constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing along an outer blood contacting surface of the cannula to thereby reduce thrombus formations along the outer blood contacting surface. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An inflow cannula for moving blood from the heart of a patient to a pump, the inflow cannula comprising:
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a liner having a length and comprising an intermediate portion that extends for a majority of the length between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing through the lumen to thereby reduce thrombus formations along an inner blood contacting surface of the cannula; a jacket fully encapsulating the liner; a continuous outer layer bonded to and surrounding the jacket and extending along a full length of the intermediate and distal portions of the liner, the outer layer constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing along an outer blood contacting surface of the cannula to thereby reduce thrombus formations along the outer blood contacting surface; a tip coupled to the distal portion of the liner and configured to be inserted through a wall of the heart; and a hub coupled to the proximal portion of the liner and configured to secure the inflow cannula to the pump. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
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49. An outflow cannula for moving blood from a pump to an arterial structure within the vascular network of a patient, the outflow cannula comprising:
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a liner having a length and comprising an intermediate portion that extends for a majority of the length between a proximal portion and a distal portion, and a lumen extending between the proximal and distal portions, wherein at least the intermediate portion is constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing through the lumen to thereby reduce thrombus formations along an inner blood contacting surface of the cannula; a jacket fully encapsulating the liner; a continuous outer layer bonded to and surrounding the jacket and extending along a full length of the intermediate and distal portions of the liner, the outer layer constructed from a porous in-growth material that permits embedment therein of endothelial cells of blood flowing along an outer blood contacting surface of the cannula to thereby reduce thrombus formations along the outer blood contacting surface; a hub coupled to the proximal portion of the liner and configured to secure the outflow cannula to the pump; and a distal end that is configured to be coupled to the arterial structure. - View Dependent Claims (50, 51, 52)
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Specification