Anti-thrombogenic medical devices
First Claim
1. A medical device for treating an aneurysm, comprising:
- a tubular member comprising a plurality of braided filaments that form a sidewall and a plurality of pores in the sidewall that are sized to inhibit flow of blood through the sidewall into the aneurysm to a degree sufficient to lead to thrombosis and healing of the aneurysm when the tubular member is positioned in a blood vessel and adjacent to the aneurysm, the pores having an average pore size that is less than or equal to about 500 microns when the tubular member is in an expanded state, and each of the filaments crossing another of the filaments at a respective crossing point,the filaments possessing antithrombogenic surfaces to increase antithrombogenicity of the medical device, wherein the pores are substantially free of webs formed by an antithrombogenic material, such that fewer than 5% of the crossing points have webs formed by the antithrombogenic material thereby permitting the pores to be substantially free of webs.
1 Assignment
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Accused Products
Abstract
Medical devices that include a tubular member with a plurality of braided filaments, each filament crossing another of the filaments at a respective crossing point forming sidewall and a plurality of pores in the sidewall that are sized to inhibit flow of blood through the sidewall into an aneurysm to a degree sufficient to lead to thrombosis and healing of the aneurysm when the tubular member is positioned in a blood vessel and adjacent to the aneurysm, the pores have an average pore size that is less than or equal to about 500 microns when the tubular member is in an expanded state, the filaments possessing antithrombogenic surfaces to increase antithrombogenicity of the medical device with pores substantially free of webs formed by antithrombogenic material, such that fewer than 5% of the crossing points have webs formed by antithrombogenic material thereby permitting the pores to be substantially free of webs.
212 Citations
20 Claims
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1. A medical device for treating an aneurysm, comprising:
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a tubular member comprising a plurality of braided filaments that form a sidewall and a plurality of pores in the sidewall that are sized to inhibit flow of blood through the sidewall into the aneurysm to a degree sufficient to lead to thrombosis and healing of the aneurysm when the tubular member is positioned in a blood vessel and adjacent to the aneurysm, the pores having an average pore size that is less than or equal to about 500 microns when the tubular member is in an expanded state, and each of the filaments crossing another of the filaments at a respective crossing point, the filaments possessing antithrombogenic surfaces to increase antithrombogenicity of the medical device, wherein the pores are substantially free of webs formed by an antithrombogenic material, such that fewer than 5% of the crossing points have webs formed by the antithrombogenic material thereby permitting the pores to be substantially free of webs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A medical device for treating an aneurysm, comprising:
a hollow body having a plurality of braided filaments each crossing another of the filaments at a respective crossing point, the body being expandable to an expanded state for treatment of the aneurysm, the body having a section for spanning a neck of the aneurysm and a plurality of pores located between the filaments, the pores in the section having a first average pore size of less than about 500 microns when the body is in the expanded state, the filaments of the section possessing antithrombogenic surfaces to increase antithrombogenicity of the medical device, wherein the pores in the section are substantially free of webs formed by an antithrombogenic material such that fewer than 5% of the crossing points have webs formed by the antithrombogenic material thereby permitting the pores in the section to be substantially free of webs. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification