EP0380102A1
Expired / Lapsed
EP
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Vascular catheter with durable lubricious coating
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1990-01-25
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Granted: —
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Expires: 2010-01-25
Abstract
Abstract A vascular catheter (10), particularly a dilatation catheter for angioplasty procedures, having bonded onto the surface thereof a durable lubricious coating (17). The coating (17) preferably has two layers (26, 28), a first polymer layer (26) such as polysiloxane comprising a three-dimensional network of polymer units, which is bonded to the catheter surface, and a second lubricious layer (28) such as silicone oil which is bonded to the first layer (26). Substantial reductions in frictional coefficients and effective profiles are obtained.
Inventors
- 👤 Sachiko Hattori
- 👤 Kirti Kamdar
- 👤 Jerry A. Hart
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:41
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61L; A61L29/00; A61L29/08; A61L29/085; A61M25/0043; A61M25/0045; A61B; A61B17/00; A61B2017/00831; A61B2017/0084; A61B2017/00849; A61M2025/1043; A61M2025/1075
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
87 words
A dilatation catheter for angioplasty procedures which has an elongated catheter body and an inflatable, relatively inelastic balloon on the distal portion thereof, said balloon having a plurality of wings in a deflated condition folded around an inner member and having bonded onto the outer surface thereof a durable lubricious coating formed by a cross-linked polysiloxane polymer having incorporated therein a lubricious material to reduce the effective profile of the balloon and to minimize damage to the arterial lining during angioplasty procedures when the balloon is inflated.
Claim 2
Dependent Claim
87 words
A dilatation catheter for angioplasty procedures which has an elongated catheter body and an inflatable, relatively inelastic balloon on the distal portion thereof, said balloon having a plurality of wings in a deflated condition folded around an inner member and having bonded onto the outer surface thereof a durable lubricious coating formed by a cross-linked polysiloxane polymer having incorporated therein a lubricious material to reduce the effective profile of the balloon and to minimize damage to the arterial lining during angioplasty procedures when the balloon is inflated.
Claim 3
Dependent Claim
37 words
The dilatation catheter of claim 1 wherein the lubricious coating comprises a base layer of cross-linked polymer bonded to the exterior surface of the balloon and lubricious material incorporated into the upper surface of said base layer.
Claim 4
Dependent Claim
14 words
The dilatation catheter of claim 2 wherein the lubricious material is a polysiloxane oil.
Claim 5
Dependent Claim
22 words
The dilatation catheter of claim 2 wherein the base layer has a three-dimensional network of polymer units in the upper portion thereof.
Claim 6
Dependent Claim
30 words
The dilatation catheter of claim 4 wherein the lubricious material is partially incorporated and locked into the three-dimensional network of polymer units in the upper portion of the base layer.
Claim 7
Dependent Claim
31 words
The dilatation catheter of any one of claims 1-5 wherein the polysiloxane polymer is a copolymer having from about 5 to about 50% of the polymeric units having reactive amino sites.
Claim 8
Dependent Claim
38 words
The dilatation catheter of any one of claims 1-6 wherein said durable lubricious coating is applied to essentially the entire distal portion of the catheter which is adapted to extend out the distal end of a guiding catheter.
Claim 9
Dependent Claim
21 words
The dilatation catheter of any one of claims 1-7 wherein the coating thickness ranges from about 0.03 to about 0.08 microns.
Claim 10
Dependent Claim
36 words
A dilatation catheter of any one of the preceding claims wherein the lubricious coating bonded onto the surface has a coefficient of friction at least 0.02 less than the coefficient of friction of the balloon surface.
Claim 11
Dependent Claim
40 words
The dilatation catheter of claim 9 wherein the lubricious coating comprises a base layer of cross-linked polysiloxane polymer bonded to the exterior surface of the balloon and a top lubricious layer bonded to the upper surface of said base layer.
Claim 12
Dependent Claim
28 words
The dilatation catheter of claim 10 wherein the polysiloxane polymer is a copolymer having from about 5 to about 50% of the polymeric units having reactive amino sites.
Claim 13
Dependent Claim
14 words
The dilatation catheter of claim 10 wherein the lubricious material is a polysiloxane oil.
Claim 14
Dependent Claim
22 words
The dilatation catheter of claim 10 wherein the base layer has a three-dimensional network of polymer units in the upper portion thereof.
Claim 15
Dependent Claim
30 words
The dilatation catheter of claim 10 wherein the lubricious layer is partially incorporated and locked into the three-dimensional network of polymer units in the upper portion of the base layer.
Claim 16
Dependent Claim
21 words
The dilatation catheter of claim 9 wherein the coating thickness on the balloon ranges from about 0.03 to about 0.08 microns.
Claim 17
Independent Claim
108 words
A method of forming a durable lubricious coating on the surface of a vascular catheter comprising: a) applying a first layer of curable resin onto the surface of the vascular catheter; b) applying curing medium to the applied resin to at least partially cure the resin and bond the resin to the catheter surface; c) applying a second layer of a lubricious material onto the first layer of resin, incorporating lubricious material into at least the top surface of said first layer; and d) applying further curing medium to the resin of the first layer to thereby bond lubricious material of the second layer to the first layer.
Claim 18
Independent Claim
108 words
A method of forming a durable lubricious coating on the surface of a vascular catheter comprising: a) applying a first layer of curable resin onto the surface of the vascular catheter; b) applying curing medium to the applied resin to at least partially cure the resin and bond the resin to the catheter surface; c) applying a second layer of a lubricious material onto the first layer of resin, incorporating lubricious material into at least the top surface of said first layer; and d) applying further curing medium to the resin of the first layer to thereby bond lubricious material of the second layer to the first layer.
Claim 19
Dependent Claim
24 words
The method of claim 16 wherein the curable resin and the lubricious material are applied as solutions with one or more organic polar solvents.
Claim 20
Dependent Claim
23 words
The method of claim 17 wherein the polar solvents are selected from the group consisting of methylene chloride, isopropyl alcohol, and mixtures thereof.
Claim 21
Dependent Claim
33 words
The method of claim 18 wherein the polar solvent contains from about 10 to about 40 percent (by volume) methylene chloride and from about 60 to about 90 percent (by volume) isopropyl alcohol.
Claim 22
Independent Claim
32 words
The method of any one of claims 16-19 wherein the curable resin is a polysiloxane copolymer having from about 5 to about 50 percent of the polymeric units having amino reaction sites.
Claim 23
Dependent Claim
13 words
The method of claim 16 wherein the lubricious oil is a dimethyoxy siloxane.
Claim 24
Dependent Claim
24 words
The method of claim 17 wherein the solution used to form the first layer contains at least 2 percent (by volume) of curable polysiloxane.
Claim 25
Dependent Claim
13 words
The method of claim 22 wherein the polymer is cured by infrared radiation.
Claim 26
Dependent Claim
24 words
The method of claim 16 wherein the first and second solutions are applied to the catheter surface by wiping such solutions onto the surface.
Claim 27
Dependent Claim
23 words
The method of claim 24 wherein the solutions are wiped onto the substrates by sponges or sponge-like bodies having said solutions absorbed therein.
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