Patent US5322659A successfully refreshed from Google Patents.
US5322659A
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Method for rendering a substrate surface antithrombogenic and/or anti-infective
Assignee: Becton Dickinson and Co
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Filing: 1990-09-21
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Granted: 1994-06-21
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Expires: 2010-09-21
Abstract
Abstract A method to render a medical article antithrombogenic and/or anti-infective includes coextruding a base polymer with a hydrophilic laminating polymer having dispersed therein a quarternary salt complexing agent and steeping the extruded article in an aqueous solution of an antithrombogenic and/or anti-infective reagent whereby the reagent is absorbed along with water by the hydrophilic polymer and reacts with the complexing agent.
Inventors
- 👤 Anthony J. Walder
- 👤 Donald D. Solomon
- 👤 Gregory J. Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/0005; A61L33/0011; A61L33/0041; A61L27/00; A61L27/50; A61L27/54; A61L29/00; A61L29/14; A61L29/16; A61L33/0023; B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/09; B29C48/16; B29C48/18; B29C48/21; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/406; A61L2300/42; A61L2300/45; B29C48/10; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; B29K2025/00; B29K2027/00; B29K2027/06; B29K2033/00; B29K2033/04; B29K2067/00; B29K2075/00; B29K2077/00; B29K2105/00; B29K2105/0005; B29K2105/0011; B29K2995/00; B29K2995/0037; B29K2995/0092; B29K2995/0093; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A method to prepare a medical tubing which is antithrombogenic and/or anti-infective comprising coextruding a melt of substantially hydrophobic polymeric substrate with a blend of a hydrophilic polymer and a quaternary ammonium salt which is stable to the conditions of said coextruding to give a tubing of said substrate having thereon a laminated layer of said blend and contacting the tubing having the laminated layer thereon with a solution of a reagent reactive with said salt selected from the group consisting of an antithrombogenic agent, an anti-infective agent and a mixture thereof.
Claim 2
Independent Claim
92 words
A method to prepare a medical tubing which is antithrombogenic and/or anti-infective comprising coextruding a melt of substantially hydrophobic polymeric substrate with a blend of a hydrophilic polymer and a quaternary ammonium salt which is stable to the conditions of said coextruding to give a tubing of said substrate having thereon a laminated layer of said blend and contacting the tubing having the laminated layer thereon with a solution of a reagent reactive with said salt selected from the group consisting of an antithrombogenic agent, an anti-infective agent and a mixture thereof.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said tubing is a solid rod.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said tubing is a hollow tube.
Claim 5
Dependent Claim
28 words
The method of claim 3 wherein said hollow tube has said laminating layer on at least one of the lumen wall and the outside wall of said substrate.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said coextruding is performed at a temperature of about 120° to 300° C.
Claim 7
Dependent Claim
31 words
The method of claim 1 wherein said polymeric substrate is selected from the group consisting of a thermoplastic polyacrylate, polystyrene, polyethylene, polypropylene, polyester, polyamide, vinyl polymer, polyurethane, polyurethaneurea and copolymers thereof.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein said hydrophilic polymer is selected from the group consisting of polyacrylic acid, poly-p-hydroxyethyl acrylate, polyurethane and copolymers thereof.
Claim 9
Dependent Claim
62 words
The method of claim 1 wherein said salt is selected from the group having the structure ##STR3## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of methyl, phenyl, benzyl and phenyl and benzyl substituted with a halogen, vinyl or alkyl group of 1-4 carbon atoms and X is a negative ion.
Claim 10
Dependent Claim
65 words
The method of claim 1 wherein said salt is selected from the group having the structure ##STR4## wherein R 1 , R 2 and R 3 are independently selected from the group consisting of methyl, phenyl, benzyl and phenyl and benzyl substituted with a halogen or alkyl group of 1-4 carbon atoms, n is 2 to about 10,000 and X is be a negative ion.
Claim 11
Dependent Claim
23 words
The method of claim 1 wherein said antithrombogenic agent is selected from the group consisting of heparin, prostaglandin, sulfated polysaccharide and mixtures thereof.
Claim 12
Dependent Claim
29 words
The method of claim 1 wherein said anti-infective agent is selected from the group consisting of an antibiotic, dibromosalicylic acid, phosphonalacetic acid, pipemidic acid, mandelic acid and nalidixic acid.
Claim 13
Dependent Claim
30 words
The method of claim 11 wherein said antibiotic is selected from the group consisting of penicillin, oxacillin, ticarcillin, carbenicillin, cephalosporin, cefoxitin, cefazolin, dicloxacillin, cloxacillin and clavulanic acid, and mixtures thereof.
Claim 14
Independent Claim
65 words
A method to prepare a medical article which is antithrombogenic and/or anti-infective comprising melt dispensing a blend of thermoplastic hydrophilic polymeric melt and complexing agent which is stable to the conditions of said melt dispensing to give a shaped polymeric article and reacting the complexing agent with a reagent selected from the group consisting of an antithrombogenic agent, an anti-infective agent and a mixture thereof.
Claim 15
Independent Claim
65 words
A method to prepare a medical article which is antithrombogenic and/or anti-infective comprising melt dispensing a blend of thermoplastic hydrophilic polymeric melt and complexing agent which is stable to the conditions of said melt dispensing to give a shaped polymeric article and reacting the complexing agent with a reagent selected from the group consisting of an antithrombogenic agent, an anti-infective agent and a mixture thereof.
Claim 16
Dependent Claim
25 words
The method of claim 13 wherein said complexing agent is selected from the group consisting of a quaternary phosphonium salt and a quaternary ammonium salt.
Claim 17
Independent Claim
102 words
A method to render a medical tubing antithrombogenic and/or anti-infective comprising: a) coextruding a melt of a thermoplastic substantially hydrophobic polyurethane with a blend of a hydrophilic polyurethane and a quaternary ammonium salt which is stable to said conditions of coextruding to give a tubing having thereon a laminated layer of said blend; and b) steeping the tubing having the laminated layer thereon in an aqueous solution of a reagent selected from the group consisting of heparin, an antibiotic and a mixture thereof whereby water and said reagent diffuse into said laminated hydrophilic polyurethane and said reagent reacts with said salt therein.
Claim 18
Independent Claim
102 words
A method to render a medical tubing antithrombogenic and/or anti-infective comprising: a) coextruding a melt of a thermoplastic substantially hydrophobic polyurethane with a blend of a hydrophilic polyurethane and a quaternary ammonium salt which is stable to said conditions of coextruding to give a tubing having thereon a laminated layer of said blend; and b) steeping the tubing having the laminated layer thereon in an aqueous solution of a reagent selected from the group consisting of heparin, an antibiotic and a mixture thereof whereby water and said reagent diffuse into said laminated hydrophilic polyurethane and said reagent reacts with said salt therein.
References Cited (Backward Citations)
US2780604A
Cited
US3634123A
Cited
US3617344A
Cited
US3759788A
Cited
US3810781A
Cited
US4349467A
Cited
US4544547A
Cited
US4677017A
Cited
US4500676A
Cited
US4521564A
Cited
US4581390A
Cited
US4678660A
Cited
US4713402A
Cited
US4841968A
Cited
US4865870A
Cited
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