Catheter having a balloon with retention enhancement
First Claim
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1. A retrograde cardioplegia catheter for supplying perfusion liquid to a coronary sinus vein through an orifice in the coronary sinus vein, the catheter comprising;
- a body receivable in a coronary sinus vein by way of an orifice in the coronary sinus vein opening into a heart chamber;
the body having a longitudinal centerline, a proximal end, and a distal end opposite from the proximal end;
an infusion lumen formed within the body and extending between the ends thereof;
the infusion lumen having at least one outlet at the distal end for discharge of liquid from the lumen;
an expandable sealing member surrounding the body proximally of the outlet, the sealing member having an exterior surface and being receivable in the orifice in its unexpanded state and radially expandable so that at least a portion of the exterior surface engages a wall of the coronary sinus to form a seal closing the orifice;
a series of barbed protuberances integrally formed on the exterior surface of the sealing member to enhance the purchase between the coronary sinus wall and the sealing member in the expanded state thereby increasing resistance to removal of the sealing member from the coronary sinus and loss of the seal, each of the barbed protuberances comprising;
a proximal surface having a base edge provided on the expandable sealing member, the proximal surface being arcuately convex and extending outwardly and proximally from the exterior surface of the sealing member in a direction oblique to the longitudinal axis of the body; and
an upper surface extending outwardly and proximally from the exterior surface of the sealing member, the upper surface and proximal surface terminating at a common, upper edge.
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Abstract
A catheter for retrograde perfusion of the heart through the coronary sinus, which has an infusion lumen for introducing perfusion liquid into the heart, a retention means such as an inflatable balloon, and can have retention enhancements such as proximally sloping spikes, or barbed protuberances on the surface of the retention means to keep it firmly in place.
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Citations
32 Claims
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1. A retrograde cardioplegia catheter for supplying perfusion liquid to a coronary sinus vein through an orifice in the coronary sinus vein, the catheter comprising;
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a body receivable in a coronary sinus vein by way of an orifice in the coronary sinus vein opening into a heart chamber; the body having a longitudinal centerline, a proximal end, and a distal end opposite from the proximal end; an infusion lumen formed within the body and extending between the ends thereof; the infusion lumen having at least one outlet at the distal end for discharge of liquid from the lumen; an expandable sealing member surrounding the body proximally of the outlet, the sealing member having an exterior surface and being receivable in the orifice in its unexpanded state and radially expandable so that at least a portion of the exterior surface engages a wall of the coronary sinus to form a seal closing the orifice; a series of barbed protuberances integrally formed on the exterior surface of the sealing member to enhance the purchase between the coronary sinus wall and the sealing member in the expanded state thereby increasing resistance to removal of the sealing member from the coronary sinus and loss of the seal, each of the barbed protuberances comprising; a proximal surface having a base edge provided on the expandable sealing member, the proximal surface being arcuately convex and extending outwardly and proximally from the exterior surface of the sealing member in a direction oblique to the longitudinal axis of the body; and an upper surface extending outwardly and proximally from the exterior surface of the sealing member, the upper surface and proximal surface terminating at a common, upper edge. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A catheter for conducting fluid to or from a human body through an orifice in the body, the orifice having an interior surface, the catheter comprising;
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a body receivable in the orifice, the body having opposed proximal and distal ends, a longitudinal axis extending between the ends, an infusion lumen formed within the body extending between the ends thereof and at least one outlet provided adjacent the distal end for discharge of liquid from the lumen; an expandable sealing member provided on and surrounding the body proximally of the outlet, the sealing member having an exterior surface and being expandable between expanded and retracted states, wherein the sealing member is receivable in the orifice in its retracted state and the exterior surface thereof contacts the interior surface of the orifice in the expanded state to form a seal substantially closing the orifice; a series of barbed protuberances integrally formed on the exterior surface of the sealing member to enhance the purchase between the interior surface of the orifice and the sealing member in the expanded state thereby increasing resistance to movement of the sealing member with respect to the orifice and loss of the seal, the barbed protuberances comprising; a proximal surface having a base edge provided on the expandable sealing member, the proximal surface being crescent-shaped and extending outwardly from the exterior surface of the sealing member; and an upper surface extending outwardly and proximally from the exterior surface of the sealing member, the upper surface and proximal surface terminating at a common, upper edge, the upper edge being arcuate. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A retrograde cardioplegia catheter for supplying perfusion liquid to a coronary sinus vein, the catheter comprising:
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a body having proximal and distal ends, the distal end being receivable in the coronary sinus vein; an infusion lumen formed within the body and extending between the ends thereof, the infusion lumen having at least one fluid outlet formed adjacent the distal end; an expandable sealing member mounted on the body proximally of the at least one fluid outlet, the sealing member having an exterior surface and being selectively radially expandable between a retracted state and an expanded state, the sealing member being receivable in the coronary sinus in its retracted state and in the expanded state, the sealing member being adapted to contact a wall of the coronary sinus to effectively prevent the flow of fluid through the coronary sinus vein around the sealing member, the sealing member further having a plurality of protuberances formed on the exterior surface to enhance the purchase between the coronary sinus wall and the sealing member in the expanded state, each protuberance comprising; a proximal surface projecting radially outwardly from the sealing member; a base edge having a pair of ends, the base edge being formed at the juncture of the proximal surface and the exterior surface of the sealing member; and a distal surface projecting radially outwardly from the sealing member, the distal surface intersecting the proximal surface at an outer edge, the outer edge having a pair of ends wherein the ends of the base edge and the ends of the outer edge are coterminous. - View Dependent Claims (17, 18, 20, 21, 22, 23, 24)
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25. A retrograde cardioplegia catheter for supplying perfusion liquid to a coronary sinus vein, the catheter comprising:
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a body having proximal and distal ends, the distal end being receivable in the coronary sinus vein; an infusion lumen formed within the body and extending between the ends thereof, the infusion lumen having at least one fluid outlet formed adjacent the distal end; an expandable sealing member mounted on the body proximally of the at least one fluid outlet, the sealing member having an exterior surface substantially circular in cross section and being selectively radially expandable between a retracted state and an expanded state, the sealing member being receivable in the coronary sinus in its retracted state and, in the expanded state, the sealing member being adapted to contact a wall of the coronary sinus to effectively prevent the flow of fluid through the coronary sinus vein around the sealing member, the sealing member further having a plurality of protuberances formed on the exterior surface to enhance the purchase between the coronary sinus wall and the sealing member in the expanded state, each protuberance comprising; a proximal surface projecting radially outwardly from the sealing member; and a distal surface projecting radially outwardly from the sealing member, the distal surface intersecting the proximal surface at an outer edge, the outer edge forming a partially circular arc which is non-concentric with respect to the circular cross section of exterior surface of the sealing member. - View Dependent Claims (19, 26, 27, 28, 29, 30, 31, 32)
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Specification