Lubricious antithrombogenic catheters, guidewires and coatings
First Claim
Patent Images
1. Method for rendering a surface of a preformed article lubricious and antithrombogenic comprising:
- providing on said surface a thin coating of biologically compatible, lubricious, hydrophilic polymer including acid groups, and thereafter applying to said coating ammonium cation, heparin and buffer solution in the manner that heparin is bound by electrostatic attraction to ammonium cation of said coating to permit time release of heparin in the presence of body fluid, and said buffer solution acts to enhance lubriciousness of said coating.
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Abstract
Method for rendering a preformed article lubricious and antithrombogenic and a device being the same. On the surface of the article a thin coating of a biologically compatible, lubricious, hydrophilic polymer including acid groups, is provided. On the coating, ammonium cation, and heparin are applied in the manner that heparin is bound by electrostatic attraction to the ammonium cation of the coating to permit time release of heparin. A buffer solution may be applied in a manner to act to enhance the lubriciousness of the coating.
495 Citations
48 Claims
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1. Method for rendering a surface of a preformed article lubricious and antithrombogenic comprising:
providing on said surface a thin coating of biologically compatible, lubricious, hydrophilic polymer including acid groups, and thereafter applying to said coating ammonium cation, heparin and buffer solution in the manner that heparin is bound by electrostatic attraction to ammonium cation of said coating to permit time release of heparin in the presence of body fluid, and said buffer solution acts to enhance lubriciousness of said coating. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 47, 48)
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2. Method for rendering a surface of a preformed article lubricious and antithrombogenic comprising:
providing on said surface a thin coating of biologically compatible, lubricious, hydrophilic polymer including acid groups, and thereafter applying to said coating ammonium cation and heparin in the manner that heparin is bound, by electrostatic attraction to ammonium cation of said coating to permit time release of heparin in the presence of body fluid, the thickness of said lubricious and antithrombogenic coating being of the order of about 10 microns or less when dry.
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26. A medical device for use within the body formed of a dimensionally stable base material forming the main body of said device and having a thin lubricious coating on its surface, said coating being capable of reducing the thrombogenicity of said surface and comprising:
a lubricious, hydrophilic, swellable polymer, being on said surface said polymer having covalently bonded acid groups, and incorporating noncovalently bonded ammonium cations, and heparin bound in a manner permitting time release in the presence of body fluid, the thickness of said lubricious and antithrombogenic coating being of the order of 10 microns or less when dry. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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27. A medical device for use within the body formed of a dimensionally stable base material forming the main body of said device and having a thin lubricious coating on its surface, said coating being capable of reducing the thrombogenicity of said surface and comprising:
a lubricious, hydrophilic, swellable polymer being on said surface, said polymer having covalently bonded acid groups and incorporating noncovalently bonded ammonium cations, and heparin bound in a manner permitting time release in the presence of body fluid, and acid salts to enhance lubricity.
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45. A medical device for use within the body formed of a dimensionally stable base material forming the main body of said device and having a thin lubricious coating on its surface, said coating being capable of reducing the thrombogenicity of said surface and formed by the process comprising:
providing on said surface a thin coating of biologically compatible, lubricious, hydrophilic polymer including acid groups, and thereafter applying to said coating ammonium cation, heparin and buffer solution in the manner that heparin is bound by electrostatic attraction to ammonium cation of said coating to permit time release of heparin in the presence of body fluid, and said buffer solution acts to enhance lubriciousness of said coating.
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46. A medical device for use within the body formed of a dimensionally stable base material forming the main body of said device and having a thin lubricious coating on its surface, said coating being capable of reducing the thrombogenicity of said surface and formed by the process comprising:
providing on said surface a thin coating of biologically compatible, lubricious, hydrophilic polymer including acid groups, and thereafter applying to said coating ammonium cation and heparin in the manner that heparin is bound, by electrostatic attraction to the ammonium cation of said coating to permit time release of heparin in the presence of body fluid, the thickness of said lubricious and antithrombogenic coating being of the order of about 10 microns or less when dry.
Specification