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.
230 Citations
15 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.
Specification