EP0472413A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Expandable catheter having hydrophobic surface
Assignee: Kendall Co
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Filing: 1991-08-21
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Granted: —
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Expires: 2011-08-21
Abstract
Abstract A catheter of a thermoplastic elastomeric hydrophilic polyurethane is coated on at least the outside surface with a hydrophobic polymer and expands to a larger lumen size in about 3 to 15 minutes when contacted with an aqueous liquid. The hydrophilic polyurethane may be synthesized by one-shot bulk polymerization, and may be melt extruded into a base tubing and dip coated with the hydrophobic polymer, or the hydrophilic polyurethane and hydrophobic polymer may be coextruded. The catheter may have multiple lumens and may include an antithrombogenic agent, antiinfective agent and radiopaque agent.
Inventors
- 👤 James M. Lambert
- 👤 Donald D. Solomon
- 👤 Delmer R. Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 06:29
CPC Classifications
A; A61; A61L; A61L29/00; A61M; A61M25/00; A61M25/0043; A61L29/08; A61L29/085; A61L29/14; A61L29/16; A61L29/18; A61L33/00; A61L33/0005; A61L33/0011; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/42; A61M25/0021; A61M25/0023; A61M2025/0024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
An expandable catheter comprising: a) a substantially hydrophilic thermoplastic elastomeric polyurethane base tubing, said polyurethane having a hard sequent of 30 to 60% and comprising the reaction product of a diisocyanate, a polyglycol component comprising at least 50% polyethyleneoxide glycol and a chain extender; b) a coating of a hydrophobic polyurethane on the outside surface of said tubing; and c) a stripe containing a radiopaque material in at least one of said base tubing and coating, said catheter, when brought into contact with an aqueous liquid, absorbing about 50 to 150% of its weight of said liquid and expanding whereby its inside diameter increases about 15 to 40%.
Claim 2
Dependent Claim
34 words
The catheter of Claim 1 further comprising an agent selected from the group consisting of an antiinfective agent, and an antithrombogenic agent associated with at least one of said base tubing and said coating.
Claim 3
Dependent Claim
8 words
The catheter of Claim 1 having multiple lumens.
Claim 4
Dependent Claim
18 words
The catheter of Claim 1 further comprising a coating of a hydrophobic polyurethane on a lumen wall thereof.
Claim 5
Dependent Claim
48 words
An expandable catheter comprising a substantially hydrophilic thermoplasticelastomeric polyurethane tubing, said polyurethane comprising the reaction product of a diisocyanate, polyethyleneoxide glycol and a chain extender, and a coating of a hydrophobic polymer on the outside surface thereof, said tubing expanding when brought into contact with an aqueous liquid.
Claim 6
Dependent Claim
26 words
The catheter of Claim 5 further comprising a stripe containing a radiopaque material encapsulated by at least one of said hydrophilic polyurethane and said hydrophobic polymer.
Claim 7
Dependent Claim
35 words
The catheter of Claim 5 further comprising an agent selected from the group consisting of an antithrombogenic agent and an antiinfective agent associated with at least one of said hydrophilic polyurethane and said hydrophobic polymer.
Claim 8
Dependent Claim
8 words
The catheter of Claim 5 having multiple lumens.
Claim 9
Dependent Claim
110 words
An expandable catheter comprising: a) a substantially hydrophilic thermoplastic elastomeric base polyurethane tubing having a hard segment of 40 to 55% and comprising the reaction product of 4,4′-diphenylmethane diisocyanate, 1-4-butanediol, and polyethyleneoxide having a molecular weight of 6,000 to 12,000; b) a coating of a hydrophobic polyurethane on the outside surface of said base tubing, said hydrophobic polyurethane comprising the reaction product of 4,4′-diphenylmethane diisocyanate, butanediol and polytetramethylene ether glycol; and c) a stripe containing a radiopaque material encapsulated by one of said base tubing and said coating; said catheter, when brought into contact with an aqueous liquid, absorbing said liquid and expanding whereby its inside diameter increases about 25%.
Claim 10
Dependent Claim
8 words
The catheter of Claim 9 having multiple lumens.
References Cited (Backward Citations)
No citation records indexed.
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