Differential covering and coating methods
First Claim
1. A medical appliance for placement within a portion of the anatomy of a patient, the appliance comprising:
- a scaffolding, the scaffolding configured to define a substantially cylindrical member having a distal end and a proximal end and extending longitudinally there between, forming a lumen there through, along the longitudinal extension of the appliance the scaffolding having an interior and an exterior surface comprising struts with geometrical patterns formed by angles, wherein the angles determine the relative flexibility of the medical appliance such that the appliance conforms to the topography of a target lumen and when pressure is exerted along varying points of the longitudinal extension of the appliance, the appliance does not foreshorten or elongate, wherein the struts comprise an interior and an exterior surface; and
a cover, comprising an interior surface and an exterior surface, the exterior surface of the cover adhered to the interior surfaces of a plurality of the struts, such that the interior surfaces of the plurality of struts and the are between the plurality of struts are covered.
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Accused Products
Abstract
The present invention, in an exemplary embodiment, provides a stent, which combines many of the excellent characteristics of both silicone and metal stents while eliminating the undesirable ones. In particular, a principal objective in accordance with the present invention is to provide a family of stents where the relative hardness/softness of regions of the stent can differ from other regions of the stent to provide additional patient comfort and resistance to compression forces. Exemplary embodiments provide a stent that is covered so as to provide certain predefined characteristics. In particular, a covered stent is provided that is coated internally such that the outer scaffolding surface of the stent has enhanced friction points while the internal surface exemplifies certain characteristics.
470 Citations
30 Claims
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1. A medical appliance for placement within a portion of the anatomy of a patient, the appliance comprising:
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a scaffolding, the scaffolding configured to define a substantially cylindrical member having a distal end and a proximal end and extending longitudinally there between, forming a lumen there through, along the longitudinal extension of the appliance the scaffolding having an interior and an exterior surface comprising struts with geometrical patterns formed by angles, wherein the angles determine the relative flexibility of the medical appliance such that the appliance conforms to the topography of a target lumen and when pressure is exerted along varying points of the longitudinal extension of the appliance, the appliance does not foreshorten or elongate, wherein the struts comprise an interior and an exterior surface; and a cover, comprising an interior surface and an exterior surface, the exterior surface of the cover adhered to the interior surfaces of a plurality of the struts, such that the interior surfaces of the plurality of struts and the are between the plurality of struts are covered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of covering a medical appliance, comprising the steps of:
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providing a mold having an internal and an external diameter; providing a medical appliance comprising a scaffolding, the scaffolding configured to define a substantially cylindrical member having a distal end and a proximal end and extending longitudinally there between, forming a lumen there through, along the longitudinal extension of the appliance the scaffolding having an interior and an exterior surface comprising struts with geometrical patterns formed by angles, wherein the angles determine the relative flexibility of the medical appliance such that the appliance conforms to the topography of a target lumen and when pressure is exerted along varying points of the longitudinal extension of the appliance, the appliance does not undesirably foreshorten or elongate, wherein the struts comprise and interior and an exterior surface; inserting the medical appliance into the internal diameter of the mold; applying a compliant cover to the interior surface of the medical appliance; and annealing the cover to the stent by applying heat to the cover such that the cover adheres to the interior surfaces of a plurality of struts, such that the interior surfaces of the plurality of struts and the area between the plurality of struts are covered. - View Dependent Claims (28, 29, 30)
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Specification