Transcatheter Heart Valve Delivery System With Reduced Area Moment of Inertia
First Claim
1. A device for repairing a heart valve of a patient, the device comprising:
- a prosthetic heart valve having a stent frame and a valve structure attached to the stent frame and forming at least two valve leaflets, the prosthetic heart valve being radially self-expandable from a compressed arrangement to a natural arrangement, the stent frame defining an axial length; and
a delivery system comprising;
an inner shaft assembly including an intermediate portion forming a coupling structure,a delivery sheath assembly defining a lumen sized to slidably receive the inner shaft assembly and including;
a shaft,a capsule extending distally from the shaft and having a distal segment defining a first outer diameter and a proximal segment defining a second outer diameter,wherein the first outer diameter is greater than the second outer diameter, and an axial length of the distal segment is less than the axial length of the stent;
wherein the device is configured to provide a loaded state in which the prosthetic heart valve engages the coupling structure and is compressibly retained within the capsule segments.
1 Assignment
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Accused Products
Abstract
A device for percutaneously repairing a heart valve of a patient including a self-expanding, stented prosthetic heart valve and a delivery system. The delivery system includes delivery sheath slidably receiving an inner shaft forming a coupling structure. A capsule of the delivery sheath includes a distal segment and a proximal segment. An outer diameter of the distal segment is greater than that of the proximal segment. An area moment of inertia of the distal segment can be greater than an area moment of inertia of the proximal segment. Regardless, an axial length of the distal segment is less than the axial length of the prosthesis. In a loaded state, the prosthesis engages the coupling structure and is compressively retained within the capsule. The capsule is unlikely to kink when traversing the patient'"'"'s vasculature, such as when tracking around the aortic arch, promoting recapturing of the prosthesis.
98 Citations
26 Claims
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1. A device for repairing a heart valve of a patient, the device comprising:
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a prosthetic heart valve having a stent frame and a valve structure attached to the stent frame and forming at least two valve leaflets, the prosthetic heart valve being radially self-expandable from a compressed arrangement to a natural arrangement, the stent frame defining an axial length; and a delivery system comprising; an inner shaft assembly including an intermediate portion forming a coupling structure, a delivery sheath assembly defining a lumen sized to slidably receive the inner shaft assembly and including; a shaft, a capsule extending distally from the shaft and having a distal segment defining a first outer diameter and a proximal segment defining a second outer diameter, wherein the first outer diameter is greater than the second outer diameter, and an axial length of the distal segment is less than the axial length of the stent; wherein the device is configured to provide a loaded state in which the prosthetic heart valve engages the coupling structure and is compressibly retained within the capsule segments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of loading a transcatheter delivery system with a prosthetic heart valve having a stent frame and a valve structure assembled to the stent frame and forming at least two valve leaflets, the prosthetic heart valve being radially self-expandable from a compressed arrangement to a natural arrangement, the method comprising:
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receiving a delivery system including; an inner shaft assembly including an intermediate portion forming a coupling structure, a delivery sheath assembly defining a lumen sized to slidably receive the inner shaft assembly and including a shaft and a capsule extending distally from the shaft, the capsule including a distal segment and a proximal segment, wherein an outer diameter of the distal segment is greater than an outer diameter of the proximal segment; coaxially disposing the prosthetic heart valve over the inner shaft assembly such that a proximal region of the prosthetic heart valve is adjacent the coupling structure; and compressing the prosthetic heart valve to the compressed arrangement over the inner shaft assembly, including disposing the capsule segments over the prosthetic heart valve and crimping the prosthetic heart valve into engagement with the coupling structure to achieve a loaded state; wherein the loaded state includes the distal segment encompassing a distal region of the prosthetic heart valve and the proximal segment encompassing a proximal region of the prosthetic heart valve. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method of repairing a defective heart valve of a patient, the method comprising:
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receiving a delivery system loaded with a radially self-expandable prosthetic heart valve having a stent frame to which a valve structure is attached, the delivery system including an inner shaft assembly coaxially received within a delivery sheath assembly having a capsule forming a distal segment and a proximal segment, the distal segment having an outer diameter greater than an outer diameter of the proximal segment, wherein the distal segment is disposed over and compressively retains a distal region of the prosthetic heart valve and the proximal segment is disposed over and compressively retains a proximal region of the prosthetic heart valve such that the prosthetic heart valve is in a compressed arrangement within the capsule; inserting the prosthetic heart valve into a bodily lumen while the prosthetic heart valve is constrained within the capsule; manipulating the delivery system to guide the prosthetic heart valve through the patient'"'"'s vasculature and into the defective heart valve; and withdrawing the capsule from the prosthetic heart valve to permit the prosthetic heart valve to self-expand and release from the delivery system and into engagement with the native heart valve. - View Dependent Claims (24, 25, 26)
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Specification