Systems for deploying an expandable cardiac shunt
First Claim
1. A system for deploying an expandable shunt into a puncture wound in a tissue wall to maintain an opening therebetween, the wall defining a reference plane, comprising:
- the expandable shunt comprising, in an expanded state;
a central flow tube defining a central axis therethrough;
distal flanges attached to a first axial end of the central flow tube; and
proximal flanges attached to a second axial end of the central flow tube opposite the first end;
a delivery catheter having a proximal handle, an outer sheath surrounding an inner sheath, the shunt being mounted in a collapsed configuration on the inner sheath with the outer sheath surrounding and maintaining the shunt in a collapsed state with the proximal flanges oriented toward the handle, and a pair of actuating rods extending from the handle distally through the inner sheath each of which engages one of the proximal flanges of the shunt, the actuating rods being linearly slidable within the inner sheath;
a puncture catheter having a proximal handle, an elongated flexible body having a distal tip, a guidewire lumen extending through the body from the handle to the distal tip, and a needle lumen extending through the body from the handle to a side port located near the distal tip; and
an elongated puncture sheath having a lumen and an elongated needle having a sharp tip sized to fit through the puncture sheath lumen such that the sharp tip projects therefrom, the puncture sheath being sized to pass through the needle lumen of the puncture catheter and project out of the side port to form a puncture in a tissue wall.
1 Assignment
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Accused Products
Abstract
Disclosed are cardiac shunts and method of delivery, and in particular, to a shunt to reduce elevated left atrial pressure (LAP). The methods include forming a puncture hole between the left atrium and the coronary sinus, widening the puncture hole, and placing an expandable shunt within the widened puncture hole. A first catheter having a side-extending needle may be used to form a puncture into the left atrium. A second catheter extends along a guidewire and an expandable shunt with distal and proximal flanges is expelled therefrom into the puncture. The shunt defines a blood flow passage therethrough that permits shunting of blood from the left atrium to the coronary sinus when the LAP is elevated. The shunt is desirable formed of a super-elastic material and manipulated with control rods. The shunt defines a tilted flow tube that facilitates collapse into the catheter.
51 Citations
20 Claims
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1. A system for deploying an expandable shunt into a puncture wound in a tissue wall to maintain an opening therebetween, the wall defining a reference plane, comprising:
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the expandable shunt comprising, in an expanded state; a central flow tube defining a central axis therethrough; distal flanges attached to a first axial end of the central flow tube; and proximal flanges attached to a second axial end of the central flow tube opposite the first end; a delivery catheter having a proximal handle, an outer sheath surrounding an inner sheath, the shunt being mounted in a collapsed configuration on the inner sheath with the outer sheath surrounding and maintaining the shunt in a collapsed state with the proximal flanges oriented toward the handle, and a pair of actuating rods extending from the handle distally through the inner sheath each of which engages one of the proximal flanges of the shunt, the actuating rods being linearly slidable within the inner sheath; a puncture catheter having a proximal handle, an elongated flexible body having a distal tip, a guidewire lumen extending through the body from the handle to the distal tip, and a needle lumen extending through the body from the handle to a side port located near the distal tip; and an elongated puncture sheath having a lumen and an elongated needle having a sharp tip sized to fit through the puncture sheath lumen such that the sharp tip projects therefrom, the puncture sheath being sized to pass through the needle lumen of the puncture catheter and project out of the side port to form a puncture in a tissue wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for deploying an expandable shunt into a puncture wound in a tissue wall to maintain an opening therebetween, the wall defining a reference plane, comprising:
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the expandable shunt comprising, in an expanded state; a central flow tube defining a central axis therethrough; distal flanges attached to a first axial end of the central flow tube; and proximal flanges attached to a second axial end of the central flow tube opposite the first end; a delivery catheter having a proximal handle, an outer sheath surrounding an inner sheath, the shunt being mounted in a collapsed configuration on the inner sheath with the outer sheath surrounding and maintaining the shunt in a collapsed state with the proximal flanges oriented toward the handle, and a pair of actuating rods extending from the handle distally through the inner sheath each of which engages one of the proximal flanges of the shunt, the actuating rods being linearly slidable within the inner sheath; a puncture catheter having a proximal handle, an elongated flexible body having a distal tip, a guidewire lumen extending through the body from the handle to the distal tip, and a needle lumen extending through the body from the handle to a side port located near the distal tip, the puncture catheter further including an expandable anchoring member located on the flexible body opposite the side port; and an elongated puncture sheath sized to pass through the needle lumen of the puncture catheter and project out of the side port to form a puncture in a tissue wall. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification