Multi-layer braided structures for occluding vascular defects and for occluding fluid flow through portions of the vasculature of the body
First Claim
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1. A medical device comprising:
- an outer fabric layer surrounding at least one inner fabric layer, each of the outer fabric layer and the at least one inner fabric layer comprising a plurality of braided strands extending from a proximal end to a distal end of each of the outer fabric layer and the at least one inner fabric layer, the outer fabric layer and the at least one inner fabric layer having an expanded preset configuration, the expanded preset configuration comprising at least one expanded diameter portion configured to be constrained to a lesser cross-sectional dimension for delivery to a treatment site in a patient'"'"'s body, the outer fabric layer and the at least one inner fabric layer having a memory property such that the at least one expanded diameter portion tends to return to the expanded preset configuration when unconstrained.
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Abstract
Described herein are a collapsible medical device and associated methods of occluding an abnormal opening in 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.
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Citations
20 Claims
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1. A medical device comprising:
an outer fabric layer surrounding at least one inner fabric layer, each of the outer fabric layer and the at least one inner fabric layer comprising a plurality of braided strands extending from a proximal end to a distal end of each of the outer fabric layer and the at least one inner fabric layer, the outer fabric layer and the at least one inner fabric layer having an expanded preset configuration, the expanded preset configuration comprising at least one expanded diameter portion configured to be constrained to a lesser cross-sectional dimension for delivery to a treatment site in a patient'"'"'s body, the outer fabric layer and the at least one inner fabric layer having a memory property such that the at least one expanded diameter portion tends to return to the expanded preset configuration when unconstrained. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification