Transcatheter prosthetic heart valve delivery device with release features
First Claim
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1. A delivery device for percutaneously deploying a stented prosthetic heart valve including a stent frame to which a valve structure is attached, the device comprising:
- a delivery sheath assembly terminating at a distal end and defining a lumen;
an inner shaft slidably disposed within the lumen; and
a capture assembly for selectively coupling the stented prosthetic heart valve relative to the inner shaft, the capture assembly comprising;
a spindle attached to the inner shaft and including at least one coupling section defining a slot; and
a biasing member positioned in the slot and configured to transition from a deflected condition to a normal condition, wherein the biasing member includes a fixed end and a free end rotatable about the fixed end, a radial projection of the free end relative to a centerline of the inner shaft is greater in the normal condition than in the deflected condition,wherein the delivery device is configured to provide;
a delivery state in which the delivery sheath assembly retains the stented prosthetic heart valve over the inner shaft and the biasing member in the deflected condition, including a portion of the stented prosthetic heart valve engaged with the at least one coupling section and the biasing member forced to the deflected condition; and
a deployment state in which the distal end of the delivery sheath assembly is withdrawn from covering at least a portion of the capture assembly, wherein the biasing member transitions to the normal condition such that the free end rotates about the fixed end to radially deflect the stent frame, and wherein the biasing member further includes an intermediate region positioned between the free end and the fixed end, wherein the intermediate region projects radially to a greater distance from the centerline than the fixed end in the normal and deflected conditions.
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Abstract
A delivery system for percutaneously delivering and deploying a stented prosthetic heart valve. The delivery device includes a delivery sheath slidably disposed over an inner shaft, and a capture assembly. The capture assembly includes at least one release feature for releasing the stented prosthetic heart valve from the delivery device.
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Citations
14 Claims
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1. A delivery device for percutaneously deploying a stented prosthetic heart valve including a stent frame to which a valve structure is attached, the device comprising:
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a delivery sheath assembly terminating at a distal end and defining a lumen; an inner shaft slidably disposed within the lumen; and a capture assembly for selectively coupling the stented prosthetic heart valve relative to the inner shaft, the capture assembly comprising; a spindle attached to the inner shaft and including at least one coupling section defining a slot; and a biasing member positioned in the slot and configured to transition from a deflected condition to a normal condition, wherein the biasing member includes a fixed end and a free end rotatable about the fixed end, a radial projection of the free end relative to a centerline of the inner shaft is greater in the normal condition than in the deflected condition, wherein the delivery device is configured to provide; a delivery state in which the delivery sheath assembly retains the stented prosthetic heart valve over the inner shaft and the biasing member in the deflected condition, including a portion of the stented prosthetic heart valve engaged with the at least one coupling section and the biasing member forced to the deflected condition; and a deployment state in which the distal end of the delivery sheath assembly is withdrawn from covering at least a portion of the capture assembly, wherein the biasing member transitions to the normal condition such that the free end rotates about the fixed end to radially deflect the stent frame, and wherein the biasing member further includes an intermediate region positioned between the free end and the fixed end, wherein the intermediate region projects radially to a greater distance from the centerline than the fixed end in the normal and deflected conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for restoring a defective heart valve of a patient, the system comprising:
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a prosthetic heart valve having a stent frame and a valve structure attached to the stent frame, the stent frame defining a distal region and a proximal region, the proximal region forming at least one post; and a delivery device, comprising; a delivery sheath assembly terminating at a distal end and defining a lumen; an inner shaft slidably disposed within the lumen; and a capture assembly for selectively coupling the prosthetic heart valve relative to the inner shaft, the capture assembly comprising; a spindle attached to the inner shaft and including at least one coupling section defining a slot; and a biasing member positioned in the slot and configured to transition from a deflected condition to a normal condition, wherein the biasing member includes a fixed end and a free end rotatable about the fixed end, a radial projection of the free end relative to a centerline of the inner shaft is greater in the normal condition than in the deflected condition, wherein the delivery device is configured to provide; a delivery state in which the delivery sheath assembly retains the prosthetic heart valve over the inner shaft and the biasing member in the deflected condition, including a portion of the prosthetic heart valve engaged with the at least one coupling section and the biasing member forced to the deflected condition; and a deployment state in which the distal end of the delivery sheath assembly is withdrawn from covering at least a portion of the capture assembly, wherein the biasing member transitions to the normal condition such that the free end rotates about the fixed end to radially deflect the stent frame, and wherein the biasing member further includes an intermediate region positioned between the free end and the fixed end, wherein the intermediate region projects radially to a greater distance from the centerline than the fixed end in the normal and deflected conditions. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification