Multilayer stent
AssigneesStryker NV Operations Limited, Stryker Corporation
InventorsBrent C. Gerberding, Ted W. Layman, Clay W. Northrop
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Abstract
A multilayer stent configured for implantation in a body lumen, including a tubular outer layer comprising a first plurality of struts defining an outer layer mesh pattern extending between first and second ends of the outer layer, and a tubular inner layer comprising a second plurality of struts defining an inner layer mesh pattern extending between first and second ends of the inner layer. The inner-layer is at least partially disposed within the outer layer, wherein at least a portion of the inner layer is attached to, or integrally formed with, at least a portion of the outer layer.
Claims20
A multilayer stent configured for implantation in a body lumen, comprising:
- a tubular outer layer comprising a first plurality of struts defining an outer layer mesh pattern extending between first and second ends of the outer layer;
- and
- a tubular inner layer comprising a second plurality of struts defining an inner layer mesh pattern extending between first and second ends of the inner layer,
- the inner-layer at least partially disposed within the outer layer,
- wherein at least a portion of the inner layer is attached to, or integrally formed with, at least a portion of the outer layer.
A method for making a multilayer stent from a tubular body, the tubular body comprising first and second end regions, the method comprising:
- creating a circumferential space within a wall of the tubular body spaced apart from the first and second end regions, thereby creating a central region including an outer layer and an inner layer;
- forming a respective plurality of struts in each of the outer and inner layers to provide a multilayer central portion, including a first plurality of struts defining an outer-layer mesh pattern, and a second plurality of struts defining an inner-layer mesh pattern.
A method for making a multilayer stent, comprising:
- forming a tubular outer member comprising a first plurality of struts defining an outer member mesh pattern extending between first and second ends of the outer member;
- forming a tubular inner member comprising a second plurality of struts defining an inner member mesh pattern extending between first and second ends of the inner member;
- positioning the inner member so as to be at least partially disposed within the outer member;
- and
- fixing the outer and inner members together at discrete locations.
A method for making a multilayer stent, comprising:
- depositing a first sacrificial layer onto an outer surface of a core to create a pattern of first recesses between regions of the first sacrificial layer corresponding to a desired mesh pattern for a first stent layer;
- depositing stent material to substantially fill the first recesses, thereby forming a plurality of first struts within the first recesses;
- removing excess stent material from the first struts to define the first stent layer;
- depositing a second sacrificial layer over the first sacrificial layer and the first stent layer to create a pattern of second recesses between regions of the second sacrificial layer corresponding to a desired mesh pattern for a second stent layer;
- depositing stent material to substantially fill the second recesses, thereby forming a plurality of second struts within the second recesses;
- removing excess stent material from the second struts to define the second stent layer;
- and
- removing the first and second sacrificial layers.
Dependencies are inferred from the claim text.