EP0778042A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Nickel-titanium, lubricious medical catheter wire
Assignee: Target Therapeutics Inc
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Filing: 1996-12-02
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Granted: —
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Expires: 2016-12-02
Abstract
Abstract This invention is a medical device for use in catheterization procedures. More specifically, it is a medical catheter wire 1 for use within a catheter lumen and having a super-elastic metallic core 10 coated with lubricious coating 26 and having a distal region 14 desirably with reduced stiffness that ends in an enlarged distal tip 20. The device may be used as a valve wire in combination with a single lumen balloon catheter or as a wire pusher in combination with an introducer delivery catheter that coaxially houses a helical vaso-occlusive coil.
Inventors
- 👤 David Kupiecki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075; A61M25/01; A61M25/09; A61M2025/09175
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
83 words
A medical catheter wire assembly for use within a medical catheter lumen, comprising: a superelastic metallic core having a proximal wire section, an intermediate wire section, a substantially straight and unshapeable distal wire section being more flexible than said intermediate wire section, and a lubricious coating at least partially covering said intermediate and distal wire sections; and an enlarged wire tip adjacent to said distal wire section and having a larger wire tip profile than said distal wire section and being substantially unshapeable.
Claim 2
Dependent Claim
20 words
The medical catheter wire assembly of claim 1, wherein said superelastic metallic core is an alloy of nickel and titanium.
Claim 3
Dependent Claim
17 words
The medical catheter wire assembly of claim 2, wherein said alloy of nickel and titanium is nitinol.
Claim 4
Dependent Claim
27 words
The medical catheter wire assembly of any one of the preceding claims, wherein said distal wire section has a smaller outer diameter than said intermediate wire section.
Claim 5
Dependent Claim
20 words
The medical catheter wire assembly of any one of the preceding claims, wherein said lubricious coating is a hydrophilic coating.
Claim 6
Dependent Claim
27 words
The medical catheter wire assembly of any one of the preceding claims, further comprising a polymeric tie layer between said superelastic metallic core and said lubricious coating.
Claim 7
Dependent Claim
23 words
The medical catheter wire assembly of any one of the preceding claims, wherein said enlarged wire tip is comprised of a radiopaque material.
Claim 8
Dependent Claim
15 words
The medical catheter wire assembly of claim 7, wherein said radiopaque material is a metal.
Claim 9
Dependent Claim
22 words
The medical catheter wire assembly of claim 8, wherein said metal is chosen from the group consisting of platinum, tungsten, and gold.
Claim 10
Dependent Claim
19 words
The medical catheter wire assembly of any one of the preceding claims, wherein said wire tip is substantially spherical.
Claim 11
Dependent Claim
121 words
The medical catheter wire assembly of any one of the preceding claims, further comprising: a balloon catheter having a proximal coupler, an expandable balloon, a balloon tip distal of said balloon and with a distal wire port, a wire lumen extending between said proximal coupler and said distal wire port and fluidly coupling said expandable balloon with said proximal coupler, and a valve seat located interiorly of said wire lumen and having a reduced inner diameter from said wire lumen, said reduced inner diameter of said valve seat being adapted to removably engage said enlarged wire tip in an interference fit to form a fluid seal such that fluid interior of said wire lumen may be pressurized to cause balloon expansion.
Claim 12
Dependent Claim
54 words
The medical catheter wire assembly of claim 11, wherein said valve seat is comprised of a compliant polymeric material and has a valve seat inner diameter less than said wire tip profile, said enlarged wire tip being adapted to coaxially enter said valve seat in a press fit to mechanically for said fluid seal.
Claim 13
Dependent Claim
107 words
The medical catheter wire assembly of any one of the preceding claims, further comprising: a delivery catheter having a proximal delivery coupler, a distal delivery port, and a polymeric delivery shaft defining a delivery lumen extending between said proximal delivery coupler and said distal delivery port, said delivery lumen having an inner diameter adapted to slideable receive said enlarged wire tip and intermediate and distal wire sections; and a target device being slideable within said delivery lumen and having a proximal device end portion adapted to cooperate with said enlarged wire tip in sliding said target device through the delivery lumen and out the distal delivery port.
Claim 14
Dependent Claim
23 words
The medical catheter wire assembly of claim 13, wherein said target device is a vaso-occlusive implant adapted for artificially occluding a body space.
Claim 15
Dependent Claim
40 words
The medical catheter wire assembly of claim 14, wherein said vaso-occlusive implant is a vaso-occlusive coil comprised of a helically wound wire, being slideable within said delivery lumen, and having a helix inner diameter smaller than said wire tip profile.
Claim 16
Dependent Claim
74 words
The medical catheter wire assembly of claim 15, wherein said vaso-occlusive coil has an expanded coil diameter when in a radially relaxed state that is greater than said delivery lumen inner diameter, said vaso-occlusive coil being radially compressible from said radially relaxed state to have a compressed coil diameter and being so compressed when disposed within said delivery lumen such that a force is exerted against the delivery lumen wall defining said delivery lumen.
References Cited (Backward Citations)
No citation records indexed.
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