Apparatus and methods for delivering devices for reducing left atrial pressure
First Claim
1. An apparatus for coupling to an atrial shunt for regulating blood pressure between a patient'"'"'s left atrium and right atrium, the apparatus comprising:
- a catheter having a proximal region and a distal region, the distal region sized and shaped to be advanced to the patient'"'"'s atrial septum;
one or more latching legs disposed at the distal region of the catheter, the one or more latching legs having a hook portion and a ramp portion disposed proximal to the hook portion;
a ring coupled to the one or more latching legs;
an actuator disposed at the proximal region of the catheter, the actuator configured to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward; and
a ring base coupled to the ring and the actuator, wherein the actuator causes the ring base to move the ring between the first position and the second position.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for regulating blood pressure between a patient'"'"'s left atrium and right atrium, and apparatus for delivery the device, are provided. The delivery apparatus may include one or more latching legs, a release ring, a pull chord, and a catheter wherein the latching legs are configured to engage the device for delivery. The inventive devices may reduce left atrial pressure and left ventricular end diastolic pressure, and may increase cardiac output, increase ejection fraction, relieve pulmonary congestion, and lower pulmonary artery pressure, among other benefits. The inventive devices may be used, for example, to treat subjects having heart failure, pulmonary congestion, or myocardial infarction, among other pathologies.
331 Citations
20 Claims
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1. An apparatus for coupling to an atrial shunt for regulating blood pressure between a patient'"'"'s left atrium and right atrium, the apparatus comprising:
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a catheter having a proximal region and a distal region, the distal region sized and shaped to be advanced to the patient'"'"'s atrial septum; one or more latching legs disposed at the distal region of the catheter, the one or more latching legs having a hook portion and a ramp portion disposed proximal to the hook portion; a ring coupled to the one or more latching legs; an actuator disposed at the proximal region of the catheter, the actuator configured to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward; and a ring base coupled to the ring and the actuator, wherein the actuator causes the ring base to move the ring between the first position and the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for coupling to an atrial shunt for regulating blood pressure between a patient'"'"'s left atrium and right atrium, the apparatus comprising:
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a catheter having a proximal region and a distal region, the distal region sized and shaped to be advanced to the patient'"'"'s atrial septum; one or more latching legs disposed at the distal region of the catheter, the one or more latching legs having a hook portion and a ramp portion disposed proximal to the hook portion, the one or more latching legs comprising two latching legs that share a common ramp portion and a third latching leg having a separate ramp portion; a ring coupled to the one or more latching legs; and an actuator disposed at the proximal region of the catheter, the actuator configured to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward. - View Dependent Claims (12)
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13. A method of coupling to an atrial shunt configured for implantation at an atrial septum, the method comprising:
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advancing a distal region of a catheter of an apparatus to the atrial septum, the apparatus further comprising an actuator at a proximal region of the catheter, one or more latching legs disposed at the distal region of the catheter and having a hook portion and a ramp portion disposed proximal to the hook portion, the one or more latching legs configured to move the atrial shunt longitudinally forward and longitudinally backward through a sheath, and a ring coupled to the one or more latching legs; and actuating the actuator to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward. - View Dependent Claims (14, 15)
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16. A method of coupling to an atrial shunt configured for implantation at an atrial septum, the method comprising:
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advancing a distal region of a catheter of an apparatus to the atrial septum, the apparatus further comprising an actuator at a proximal region of the catheter, one or more latching legs disposed at the distal region of the catheter and having a hook portion and a ramp portion disposed proximal to the hook portion, and a ring coupled to the one or more latching legs; actuating the actuator to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward; and positioning the atrial shunt across a puncture through a fossa ovalis such that a neck region of the atrial shunt is positioned in the puncture, and wherein a first flared end region of the atrial shunt is disposed in a right atrium in an expanded state and a second flared end region is disposed in a left atrium in an expanded state. - View Dependent Claims (17, 18)
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19. A method of coupling to an atrial shunt configured for implantation at an atrial septum, the method comprising:
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identifying a middle of a fossa ovalis of the atrial septum by pressing a needle against the fossa ovalis to partially tent the fossa ovalis, and puncturing the middle of the fossa ovalis with the needle such that the atrial shunt is deployed away from a limbus, an atrial wall, and a ridge between an inferior vena cava and coronary sinus; advancing a distal region of a catheter of an apparatus to the atrial septum, the apparatus further comprising an actuator at a proximal region of the catheter, one or more latching legs disposed at the distal region of the catheter and having a hook portion and a ramp portion disposed proximal to the hook portion, and a ring coupled to the one or more latching legs; and actuating the actuator to move the ring between a first position, where the ring contacts a first section of the ramp portion such that the one or more latching legs extend radially outward, and a second position, where the ring contacts a second section of the ramp portion such that the one or more latching legs move radially inward. - View Dependent Claims (20)
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Specification