EP0448886A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catheter tubing of controlled in vivo softening
Assignee: Becton Dickinson and Co
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Filing: 1990-12-28
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Granted: —
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Expires: 2010-12-28
Abstract
Abstract A tubing, suitable for use as a catheter tubing, comprises a hydrophobic thermoplastic stiffening polymer encapsulated by a hydrophilic thermoplastic polyurethane or polyetherurethane.
Inventors
- 👤 Min-Shiu Lee
- 👤 Mutlu Karakelle
- 👤 David E. Spielvogel
- 👤 Robert A. Taller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0054; A61L; A61L29/00; A61L29/08; A61L29/085; A61L29/14; C; C08; C08L; C08L75/00; C08L75/04; A61M2025/0063; A61M2025/0064
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
A tubing comprising a hydrophobic thermoplastic stiffening polymer encapsulated by a hydrophilic thermoplastic polyurethane or polyetherurethane.
Claim 2
Dependent Claim
17 words
A tubing as claimed in claim 1 wherein the polyester is in the form of a stripe.
Claim 3
Dependent Claim
20 words
A tubing as claimed in claim 1 wherein the polyester is a layer encapsulated by laminating layers of said polyurethane.
Claim 4
Dependent Claim
21 words
A tubing of claim 1 further comprising a radiopaque agent dispersed in at least one of the polymer and the polyetherurethane.
Claim 5
Dependent Claim
27 words
A tubing as claimed in claim 1 wherein the polymer is a polyolefin, polyamide, polyester, polycarbonate, polyurethane of at least 50% hard segment, or liquid crystalline polymer.
Claim 6
Dependent Claim
16 words
A tubing as claimed in claim 5 wherein the liquid liquid crystalline polymer is a polyester.
Claim 7
Dependent Claim
16 words
A tubing as claimed in claim 6 in which the polyester is encapsulated by a polyetherurethane.
Claim 8
Dependent Claim
19 words
A tubing as claimed in claim 7 wherein the polyester is a block copolymer having polyester and polyether segments.
Claim 9
Dependent Claim
43 words
A catheter tubing according to claim 8 comprising a thermoplastic hydrophobic polyester-polyether block copolymer having a Shore D hardness of about 50 to 80 encapsulated in a hydrophilic thermoplastic polyetherurethane which is the reaction product of 4,4'-diphenylmethane diisocyanate, polytetramethylene ether glycol and 1,4-butanediol.
References Cited (Backward Citations)
GB2016274A
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EP0033659A2
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WO1986001813A1
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EP0289218A2
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