Valved apical conduit with trocar for beating-heart ventricular assist device placement
First Claim
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1. An inflow cuff assembly for beating-heart apical cannulation of a heart, comprising:
- a tube having a first end and a second end and a lumen defined therethrough, said first end constructed and adapted to be inserted into the heart;
a valve disposed on and integral with the interior of said tube, said valve having two or more compliant leaves constructed and adapted to form a releasable seal with one another, said valve (1) preventing blood flow out of the heart when closed and (2) opening in response to pressure directed towards the heart;
trocar for selective insertion through-its the lumen of said tube, the trocar constructed and arranged to form a hole in the heart of sufficient size to admit the first end of said tube; and
synthetic conduit constructed and arranged for selective insertion into the lumen of said tube to open said valve and to establish a route for blood flow out of the heart.
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Abstract
An inflow cuff with trocar for apical cannulation of the heart. The inflow cuff has an omni-directional or unidirectional valve that prevents blood from flowing out of the heart, thus facilitating apical cannulation in beating-heart situations. The inflow cuff is particularly suited for use in ventricular assist device (VAD) implantation procedures, in which the trocar would be used to punch a hole in the apex, followed by immediate insertion of the inflow cuff. If used in a VAD implantation procedure, the valve of the inflow cuff prevents blood loss until an inflow conduit from the VAD is inserted.
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Citations
20 Claims
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1. An inflow cuff assembly for beating-heart apical cannulation of a heart, comprising:
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a tube having a first end and a second end and a lumen defined therethrough, said first end constructed and adapted to be inserted into the heart;
a valve disposed on and integral with the interior of said tube, said valve having two or more compliant leaves constructed and adapted to form a releasable seal with one another, said valve (1) preventing blood flow out of the heart when closed and (2) opening in response to pressure directed towards the heart;
trocar for selective insertion through-its the lumen of said tube, the trocar constructed and arranged to form a hole in the heart of sufficient size to admit the first end of said tube; and
synthetic conduit constructed and arranged for selective insertion into the lumen of said tube to open said valve and to establish a route for blood flow out of the heart. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A medical device which may be inserted into the heart of a patient to provide a passageway for blood flow, comprising:
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an inflow cuff having a lumen and a valve, wherein said valve (1) prevents blood from flowing out of the heart when closed and (2) opens in response to pressure in the lumen directed inward toward the heart;
a trocar which is inserted longitudinally through the lumen of said inflow cuff and protrudes beyond an insertion end of said inflow cuff, said trocar being retractable and removable from the lumen of said inflow cuff; and
a synthetic conduit constructed and arranged for selective insertion into the lumen of said tube to open said valve and to establish a route for blood flow out of the heart. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of providing a passageway for blood flow out of a heart, comprising:
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inserting an inflow cuff into the apex of heart, the inflow cuff including a tube having a first end and a second end and a lumen defined therethrough, said first end constructed and adapted to be inserted into the heart;
a sewing ring disposed on an exterior surface of said tube proximate to said first end, said sewing ring constructed and adapted to be sutured to an exterior wall of the heart and to retain the first end of said tube at a selected position in the heart; and
a valve disposed on and integral with the interior of said tube, said valve having two or more compliant leaves constructed and adapted to form a releasable seal with one another, said valve (1) preventing blood flow out of the heart when closed and (2) opening in response to pressure directed towards the heart;
said inserting including inserting a trocar through the lumen of said tube, the trocar constructed and arranged to form a hole in the heart of sufficient size to admit the first end of said tube;
retracting said trocar and removing it from said tube; and
inserting a synthetic conduit through the lumen of said tube to open said valve and to establish a route for blood flow out of the heart. - View Dependent Claims (20)
securing said sewing ring to the heart; and
applying an external tie to an exterior surface of said inflow cuff to retain the conduit within said inflow cuff.
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Specification