Multi-layer braided structures for occluding vascular defects
First Claim
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1. A medical device for occluding a patent ductus arteriosus, the medical device comprising:
- at least two layers of generally concentrically oriented tubular metal fabric having an expanded preset configuration comprising proximal and distal ends,wherein the medical device comprises in the expanded preset configuration a proximal disk-shaped portion at the proximal end and a distal disk-shaped portion at the distal end and a central cylindrical portion disposed therebetween, each of the proximal and distal disk-shaped portions having a maximum cross-sectional dimension larger than the central cylindrical portion;
wherein the medical device in the expanded preset configuration further comprises a reduced diameter segment coupled to either of the proximal or distal disk-shaped portions and the central cylindrical portion, the reduced diameter segment having a maximum cross-sectional dimension smaller than both the proximal and distal disk-shaped portions and the central cylindrical portion.
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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.
153 Citations
20 Claims
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1. A medical device for occluding a patent ductus arteriosus, the medical device comprising:
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at least two layers of generally concentrically oriented tubular metal fabric having an expanded preset configuration comprising proximal and distal ends, wherein the medical device comprises in the expanded preset configuration a proximal disk-shaped portion at the proximal end and a distal disk-shaped portion at the distal end and a central cylindrical portion disposed therebetween, each of the proximal and distal disk-shaped portions having a maximum cross-sectional dimension larger than the central cylindrical portion; wherein the medical device in the expanded preset configuration further comprises a reduced diameter segment coupled to either of the proximal or distal disk-shaped portions and the central cylindrical portion, the reduced diameter segment having a maximum cross-sectional dimension smaller than both the proximal and distal disk-shaped portions and the central cylindrical portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification