EP0873759A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tri-layer extruded medical tubing and medical devices incorporating such tubing
Assignee: Schneider USA Inc
•
Filing: 1998-04-09
•
Granted: —
•
Expires: 2018-04-09
Abstract
Abstract The present invention provides a length of trilayer, extruded, medical tubing (10) comprising an outer layer (16), a core layer (12), and an intermediate tie layer (14). The outer layer (16) comprises a polymer that is directly bondable, while the core layer (12) comprises a lubricious polymer. The core layer (12) thus defines a lumen (15) that exhibits the desired characteristics, i.e., low friction for the advancement of a guidewire or catheter through the lumen without comprising the strength and stiffness that is desirable in tubing that is to be used in medical devices. Additionally, the tubing (10) is easily coextruded and yet, is not subject to delamination, thus providing the added advantage of providing a reduction in the overall cost of manufacture. <IMAGE>
Inventors
- 👤 Christine M. Samuelson
- 👤 Sarah J. Krieger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 09:19
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; A; A61; A61M; A61M25/00; A61M25/0009; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/12; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B32; B32B; B32B1/00; B32B1/08; A61M25/0043; A61M25/0045; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
57 words
A length of coextruded, flexible tubing (10) suitable for use in a medical device
comprising: an outer layer (16) comprising a directly bondable polymer; a core layer (12) defining a lumen (13) extending through the length of tubing
(10), said core layer (12) comprising a lubricious polymer, and an intermediate tie layer (14) comprising a functionalized polymer.
Claim 2
Dependent Claim
24 words
The tubing (10) of claim 1, wherein the polymer of the outer layer (16) is
selected from a polyester, a polyamide, or combinations thereof.
Claim 3
Dependent Claim
17 words
The tubing (10) of claim 2, wherein the polymer of the outer layer (16) is a
polyester.
Claim 4
Dependent Claim
21 words
The tubing (10) of claim 3, wherein the polyester comprises at least one
polyether segment and at least one polyester segment.
Claim 5
Dependent Claim
17 words
The tubing (10) of claim 2, wherein the polymer of the outer layer (16) is a
polyamide.
Claim 6
Dependent Claim
27 words
The tubing (10) of claim 1, wherein the lubricious polymer of the core layer
(12) is selected from an olefinic polymer, a fluorinated polymer or combinations
thereof.
Claim 7
Dependent Claim
19 words
The tubing (10) of claim 6, wherein the lubricious polymer of the core layer
(12) is an olefinic polymer.
Claim 8
Dependent Claim
30 words
The tubing (10) of claim 7, wherein the olefinic polymer is selected from high
density polyethylene, ultra high density polyethylene, low density polyethylene, linear
low density polyethylene, or combinations thereof.
Claim 9
Dependent Claim
19 words
The tubing (10) of claim 6, wherein the lubricious polymer of the core layer
(12) is a fluorinated polymer.
Claim 10
Dependent Claim
13 words
The tubing (10) of claim 9, wherein the fluorinated polymer is polyvinylidene
fluoride.
Claim 11
Dependent Claim
30 words
The tubing (10) of claim 1, wherein the intermediate tie layer (14) comprises a
polymer selected from an anhydride modified olefinic polymer, an acrylate modified
olefinic polymer or combinations thereof.
Claim 12
Dependent Claim
86 words
The tubing (10) of claim 11, wherein the polymer of the intermediate tie layer
(14) is selected from a functionalized polyethylene, a functionalized vinylic polymer, a
ethylene-methyl acrylate copolymer, an acid modified ethyl vinyl acetate polymer, an
acid modified ethylene acrylate copolymer, an anhydride modified ethylene acrylate
copolymer, an anhydride modified ethyl vinyl acetate copolymer, an acid modified
ethyl vinyl acetate polymer, an acrylate modified ethyl vinyl acetate polymer, an
anhydride modified ethyl vinyl acetate copolymer, an anhydride modified ethyl vinyl
acetate polymer, or combinations thereof.
Claim 13
Dependent Claim
42 words
The tubing (10) of claim 12, wherein the polymer of the intermediate tie layer
(14) is selected from a functionalized polyethylene, a functionalized copolymer
obtained from monomers comprising ethylene and alleyl (meth)acrylate, an anhydride
modified ethyl vinyl acetate polymer, or combinations thereof
Claim 14
Dependent Claim
67 words
The tubing (10) of claim 1, wherein the polymer of the outer layer (16) has a
first glass transition temperature, the intermediate tie layer (14) comprises a polymer
having a second glass transition temperature, and the lubricious polymer of the core
layer (12) has a third glass transition temperature; and wherein the first, second and
third glass transition temperatures are within 85% to 115% of each other.
Claim 15
Dependent Claim
34 words
The tubing (10) of claim 14, wherein the third glass transition temperature is
greater than the second glass transition temperature and the second glass transition
temperature is greater than the first glass transition temperature.
Claim 16
Dependent Claim
80 words
A medical device (220, 420, 720) adapted for percutaneous transluminal use
comprising: a length of coextruded, flexible tubing (10, 210, 410, 710) comprising: an outer layer (16) comprising a directly bondable polymer; a core layer (12) defining a lumen extending through the length of
tubing, said core layer comprising a lubricious polymer, and an intermediate tie layer (14) comprising a functionalized polymer; and a radially expansive component (224, 424, 726) coupled to the length of tubing
(10, 210, 410, 710).
Claim 17
Dependent Claim
18 words
The medical device (220, 420) of claim 16, wherein the radially expansive
component is a balloon (224, 424).
Claim 18
Dependent Claim
36 words
The medical device (220, 420) of claim 17, wherein the balloon (224, 424) is
directly bonded to the outer layer (16) of the tubing (10, 210, 410) at the distal end of
the balloon (232, 432).
Claim 19
Dependent Claim
36 words
The medical device (220, 420) of claim 18, wherein the balloon (224, 424) is
thermally bonded to the outer layer (16) of the tubing (10, 210, 410) at the distal end of
the balloon (232, 432).
Claim 20
Dependent Claim
36 words
The medical device (220, 420) of claim 18, wherein the balloon (224, 424) is
fusion bonded to the outer layer (16) of the tubing (10, 210, 410) at the distal end of the
balloon (232, 432).
Claim 21
Dependent Claim
20 words
The medical device (220, 420) of claim 17, wherein the tubing (10, 210, 410)
defines a guidewire lumen (234, 434).
Claim 22
Dependent Claim
22 words
The medical device (220) of claim 21, wherein the guidewire lumen (234)
extends through the entire length of the medical device (220).
Claim 23
Dependent Claim
17 words
The medical device (220) of claim 22, wherein the medical device (220) is an
over-the-wire catheter (220).
Claim 24
Dependent Claim
48 words
The medical device (420) of claim 21, wherein the distal end (4106) of the
guidewire lumen (434) exits through the distal end (468) of the medical device (420)
and the proximal end (496) of the guidewire lumen exits through a side wall (466) of
the medical device (420).
Claim 25
Dependent Claim
18 words
The medical device (420) of claim 24, wherein the medical device (420) is a
rapid exchange catheter (420).
Claim 26
Dependent Claim
27 words
The medical device (220, 420, 720) of claim 16, wherein the polymer of the
outer layer (16) is selected from a polyester, a polyamide, or combinations thereof.
Claim 27
Dependent Claim
20 words
The medical device (220, 420, 720) of claim 26, wherein the polymer of the
outer layer (16) is a polyester.
Claim 28
Dependent Claim
24 words
The medical device (220, 420, 720) of claim 27, wherein the polyester
comprises at least one polyether segment and at least one polyester segment.
Claim 29
Dependent Claim
20 words
The medical device (220, 420, 720) of claim 26, wherein the polymer of the
outer layer (16) is a polyamide.
Claim 30
Dependent Claim
30 words
The medical device (220, 420, 720) of claim 16, wherein the lubricious polymer
of the core layer (12) is selected from an olefinic polymer, a fluorinated polymer or
combinations thereof.
Claim 31
Dependent Claim
22 words
The medical device (220, 420, 720) of claim 30, wherein the lubricious polymer
of the core layer (12) is an olefinic polymer.
Claim 32
Dependent Claim
33 words
The medical device (220, 420, 720) of claim 31, wherein the olefinic polymer is
selected from high density polyethylene, ultra high density polyethylene, low density
polyethylene, linear low density polyethylene, or combinations thereof.
Claim 33
Dependent Claim
22 words
The medical device (220, 420, 720) of claim 30, wherein the lubricious polymer
of the core layer (12) is a fluorinated polymer.
Claim 34
Dependent Claim
16 words
The medical device (220, 420, 720) of claim 33, wherein the fluorinated
polymer is polyvinylidene fluoride.
Claim 35
Dependent Claim
33 words
The medical device (220, 420, 720) of claim 16, wherein the intermediate tie
layer (14) comprises a polymer selected from an anhydride modified olefinic polymer,
an acrylate modified olefinic polymer, or combinations thereof.
Claim 36
Dependent Claim
89 words
The medical device (220, 420, 720) of claim 35, wherein the polymer of the
intermediate tie layer (14) is selected from a functionalized polyethylene, a
functionalized vinylic polymer, a ethylene-methyl acrylate copolymer, an acid modified
ethyl vinyl acetate polymer, an acid modified ethylene acrylate copolymer, an
anhydride modified ethylene acrylate copolymer, an anhydride modified ethyl vinyl
acetate copolymer, an acid modified ethyl vinyl acetate polymer, an acrylate modified
ethyl vinyl acetate polymer, an anhydride modified ethyl vinyl acetate copolymer, an
anhydride modified ethyl vinyl acetate polymer, or combinations thereof.
Claim 37
Dependent Claim
38 words
The medical device (220, 420, 720) of claim 36, wherein the polymer of the
intermediate tie layer (14) is selected from a functionalized polyethylene, an ethylenemethyl
acrylate copolymer, an anhydride modified ethyl vinyl acetate polymer, or
combinations thereof.
Claim 38
Dependent Claim
29 words
The medical device (220, 420, 720) of claim 17, wherein the tubing (10, 210,
410, 710) has an outside diameter of from about 0.5 millimeters to about 0.7
millimeters.
Claim 39
Dependent Claim
29 words
The medical device (220, 420, 720) of claim 38, wherein the tubing (10, 210,
410, 710) has an outside diameter of from about 0.55 millimeters to about 0.63
millimeters.
Claim 40
Dependent Claim
29 words
The medical device (220, 420, 720) of claim 17, wherein the tubing (10, 210,
410, 710) has an inside diameter of from about 0.4 millimeters to about 0.6 millimeters.
Claim 41
Dependent Claim
29 words
The medical device (220, 420, 720) of claim 41, wherein the tubing (10, 210,
410, 710) has an inside diameter of from about 0.43 millimeters to about 0.51
millimeters.
Claim 42
Dependent Claim
70 words
The medical device (220, 420, 720) of claim 16, wherein the polymer of the
outer layer (16) has a first glass transition temperature, the intermediate tie layer (14)
comprises a polymer having a second glass transition temperature, and the lubricious
polymer of the core layer (12) has a third glass transition temperature; and wherein the
first, second and third glass transition temperatures are within 85% to 115% of each
other.
Claim 43
Dependent Claim
37 words
The medical device (220, 420, 720) of claim 44, wherein the third glass
transition temperature is greater than the second glass transition temperature and the
second glass transition temperature is greater than the first glass transition temperature.
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