Multi-layer braided structures for occluding vascular defects
First Claim
1. A collapsible medical device comprising an outer metal fabric surrounding an inner metal fabric, said outer and inner metal fabrics each having a plurality of braided metal strands with an expanded preset configuration and proximal and distal ends, said proximal and distal ends having means for securing the plurality of braided strands comprising the inner and outer metal fabrics together, the medical device being shaped to create an occlusion of an abnormal opening in a vascular organ, said expanded preset configuration being deformable to a lesser cross-sectional dimension for delivery through a channel in a patient'"'"'s body the outer and inner metal fabrics having a memory property such that the medical device tends to return to said expanded preset configuration when unconstrained.
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Accused Products
Abstract
A collapsible medical device and associated methods of occluding an abnormal opening in, for example, a body organ, wherein the medical device is shaped from plural layers of a heat-treatable metal fabric. Each of the fabric layers is formed from a plurality of metal strands and the assembly is heat-treated within a mold in order to substantially set a desired shape of the device. By incorporating plural layers in the thus-formed medical device, the ability of the device to rapidly occlude an abnormal opening in a body organ is significantly improved.
521 Citations
83 Claims
- 1. A collapsible medical device comprising an outer metal fabric surrounding an inner metal fabric, said outer and inner metal fabrics each having a plurality of braided metal strands with an expanded preset configuration and proximal and distal ends, said proximal and distal ends having means for securing the plurality of braided strands comprising the inner and outer metal fabrics together, the medical device being shaped to create an occlusion of an abnormal opening in a vascular organ, said expanded preset configuration being deformable to a lesser cross-sectional dimension for delivery through a channel in a patient'"'"'s body the outer and inner metal fabrics having a memory property such that the medical device tends to return to said expanded preset configuration when unconstrained.
- 28. A collapsible medical device comprising an outer metal fabric surrounding an inner metal fabric, said outer and inner metal fabrics each having a plurality of braided metal strands with an expanded preset configuration and proximal and distal ends, said proximal and distal ends having means for securing together the plurality of braided strands comprising the inner and outer metal fabrics, the medical device being pre-shaped with a central cylindrical portion with end walls, said central cylindrical portion enclosed at each end by a coaxial disk member formed of back to back inner and outer walls, said disk members having an inner diameter portion perpendicular to the axis of the central cylindrical portion and a disk outer diameter portion which is angled toward the central cylindrical portion and being larger in diameter than the central cylindrical portion, said central cylindrical portion and disk members meeting at a reduced diameter that is small in comparison to the diameter of the cylindrical portion, to create an occlusion of an abnormal opening in a vascular organ, said expanded preset configuration being deformable to a lesser cross-sectional dimension for delivery through a channel in a patient'"'"'s body the outer and inner metal fabrics having a memory property such that the medical device tends to return to said expanded preset configuration when unconstrained.
- 75. A collapsible medical device comprising a cylindrical central segment and distal and proximal end segments, each of said segments having a plurality of braided metal strands exhibiting an expanded, preset configuration where the distal and proximal end segments comprise disk members having diameters greater than that of the central segment, the disk members being integrally attached to opposed ends of the central segment by connecting segments of a diameter less than that of the central segment, the central segment surrounding an inner cylindrical layer of braided metal strands.
Specification