PROSTHETIC VALVE AND DEPLOYMENT METHOD
First Claim
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1. A prosthetic valve, comprising:
- an anchor formed from a shape memory material having martensitic state, an austenitic state, and a transition condition that is not a normal body condition, the anchor defining a delivery size, being mechanically deformable to a deployment size which is larger than the delivery size when in the martensitic state, and trained to shrink to a repositioning size which is smaller than deployment size when exposed to the transition condition and to remain at the repositioning size when subsequently exposed to normal body conditions; and
a leaflet device carried by the anchor and movable between an open orientation and a closed orientation.
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Abstract
Prosthetic valves that are adapted to be expanded into deployment and shrunk for repositioning and methods that are applicable to such valves.
102 Citations
32 Claims
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1. A prosthetic valve, comprising:
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an anchor formed from a shape memory material having martensitic state, an austenitic state, and a transition condition that is not a normal body condition, the anchor defining a delivery size, being mechanically deformable to a deployment size which is larger than the delivery size when in the martensitic state, and trained to shrink to a repositioning size which is smaller than deployment size when exposed to the transition condition and to remain at the repositioning size when subsequently exposed to normal body conditions; and a leaflet device carried by the anchor and movable between an open orientation and a closed orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for use with a prosthetic valve having a leaflet device and a valve anchor with a martensitic state and an austenitic state, the method comprising the step of:
shrinking the valve anchor from a deployed size to a smaller repositioning size by causing the valve anchor to transition from the martensitic state to the austenitic state. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. An assembly, comprising:
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a probe defining a longitudinal axis; an expandable device, carried by the probe, including distal portion and a carrying portion, the distal portion defining a larger cross-sectional size perpendicular to the longitudinal axis than the carrying portion; and a prosthetic valve including a leaflet device and an anchor formed from shape memory material carried by the carrying portion of the expandable device. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A prosthetic valve, comprising:
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an anchor including at least one structural member formed from a shape memory material and defining a non-constant cross-sectional size; and a leaflet device carried by the anchor and movable between an open orientation and a closed orientation. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification