Retaining mechanisms for prosthetic valves
First Claim
1. A delivery system for encircling native leaflets of a heart valve to deliver a support band that at least partially surrounds the native leaflets, the system comprising:
- a delivery catheter with a lumen of a first diameter;
a precurved catheter with a lumen and an outer diameter that is smaller than the first diameter, the precurved catheter being receivable in the lumen of the delivery catheter and biased to return to a predetermined curved configuration when it is advanced out of an opening in the delivery catheter;
a precurved guidewire receivable in the lumen of the precurved catheter, the precurved guidewire being biased to return to a predetermined curved configuration when it is advanced out of the precurved catheter; and
a support band that has an elongate support member, the elongate support member having a lumen for receiving the guidewire.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein are representative embodiments of methods, apparatus, and systems used to deliver a prosthetic heart valve to a deficient valve. In one embodiment, for instance, a support member is positioned to at least partially surround the native leaflets of a valve. A locking member is used to couple both ends of the support member, forming a support band. An expandable prosthetic heart valve is delivered into the native heart valve and expanded while the expandable prosthetic valve is at least partially within the support band, thereby causing one or more of the native leaflets of the native heart valve to be frictionally secured between the support band and the expanded prosthetic heart valve.
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Citations
22 Claims
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1. A delivery system for encircling native leaflets of a heart valve to deliver a support band that at least partially surrounds the native leaflets, the system comprising:
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a delivery catheter with a lumen of a first diameter; a precurved catheter with a lumen and an outer diameter that is smaller than the first diameter, the precurved catheter being receivable in the lumen of the delivery catheter and biased to return to a predetermined curved configuration when it is advanced out of an opening in the delivery catheter; a precurved guidewire receivable in the lumen of the precurved catheter, the precurved guidewire being biased to return to a predetermined curved configuration when it is advanced out of the precurved catheter; and a support band that has an elongate support member, the elongate support member having a lumen for receiving the guidewire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A delivery system for encircling native leaflets of a heart valve to deliver a support band that at least partially surrounds the native leaflets, the system comprising:
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a delivery catheter with a lumen of a first diameter; a precurved catheter with a lumen and an outer diameter that is smaller than the first diameter, the precurved catheter being receivable in the lumen of the delivery catheter and biased to return to a predetermined curved configuration when it is advanced out of an opening in the delivery catheter; a precurved guidewire receivable in the lumen of the precurved catheter, the precurved guidewire being biased to return to a predetermined curved configuration when it is advanced out of the precurved catheter; and a snare configured to be advanced through the delivery catheter, the snare further configured to capture a distal end portion of the precurved guidewire and pull the distal end portion of the precurved guidewire back through the delivery catheter such that a section of the precurved guidewire forms a loop extending around the native leaflets. - View Dependent Claims (11, 12)
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13. A delivery system for encircling native leaflets of a heart valve to deliver a support band that at least partially surrounds the native leaflets, the system comprising:
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a delivery catheter having a distal end; a precurved guidewire configured to extend distally through the delivery catheter in a first direction beyond the distal end of the delivery catheter, around the native leaflets, and proximally back though the delivery catheter in a second direction so as to form a loop around the native leaflets; an elongated pusher member having a distal end portion; and a support band coupled to the distal end portion of the pusher member; wherein the pusher member is configured to push the support band over the precurved guidewire such that the support band extends around the native leaflets. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A delivery system for encircling native leaflets of a heart valve to deliver a support band that at least partially surrounds the native leaflets, the system comprising:
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a delivery catheter having a distal end; a precurved guidewire configured to extend distally through the delivery catheter in a first direction beyond the distal end of the delivery catheter, around the native leaflets, and proximally back though the delivery catheter in a second direction so as to form a loop around the native leaflets; and a snare configured to be advanced through the delivery catheter, the snare further configured to capture a distal end portion of the precurved guidewire and pull the distal end portion of the precurved guidewire back through the delivery catheter in the second direction to form the loop extending around the native leaflets.
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22. A method comprising:
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providing a delivery system for encircling native leaflets of a heart valve, the system comprising; a delivery catheter having a distal end; a precurved guidewire configured to extend distally through the delivery catheter in a first direction beyond the distal end of the delivery catheter, around the native leaflets, and proximally back though the delivery catheter in a second direction so as to form a loop around the native leaflets; advancing the delivery catheter into the body of a patient; advancing the precurved guidewire distally through the delivery catheter in the first direction such that a distal end portion of the guidewire extends beyond the distal end of the delivery catheter; further advancing the precurved guidewire such that the guidewire curves around the native leaflets of the heart valve; and moving the distal end portion of the precurved guidewire proximally back through the delivery catheter in the second direction, wherein moving the distal end portion of the precurved guidewire proximally back through the delivery catheter further comprises advancing a snare distally through the delivery catheter, capturing the distal end portion of the guidewire with the snare, and pulling the snare and the distal end portion of the guidewire proximally back though the delivery catheter.
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Specification