EP0340304A1
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EP
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Guide wire for catheters and method of manufacturing same
Assignee: Terumo Corp
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Filing: 1987-12-25
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Granted: —
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Expires: 2007-12-25
Abstract
Abstract A guide wire for a catheter consists of a linear elastic alloy forming the wire, and is heat treated so that the flexibility is increased progressively from the base towards the tip. At least the tip of the linear base material may be covered with a thermoplastic resin and/or a coiled spring. A method of manufacturing such a catheter guide wire, consisting of the steps of dividing the chip of the base material into a number of sections. The sections are heat treated at different temperatures, and under different time conditions so that the flexibility of the base material increases progressively from the base towards the tip.
Inventors
- 👤 Kyuta Sagae
- 👤 Yoshiaki Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:39
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09083; A61M2025/09133; A61M2025/09141
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
79 words
A catheter guide wire having leading and trailing end sides, wherein said guide wire comprises a wire member made of an elastic alloy member, at least said distal end side thereof has an outer diameter equal to or smaller than a minimum inner diameter of a catheter, and said wire member is subjected to a heat treatment so that flexibility thereof is sequentially increased from a proximal end portion to a distal end portion of said leading end side.
Claim 2
Dependent Claim
79 words
A catheter guide wire having leading and trailing end sides, wherein said guide wire comprises a wire member made of an elastic alloy member, at least said distal end side thereof has an outer diameter equal to or smaller than a minimum inner diameter of a catheter, and said wire member is subjected to a heat treatment so that flexibility thereof is sequentially increased from a proximal end portion to a distal end portion of said leading end side.
Claim 3
Dependent Claim
28 words
A guide wire according to claim 1, characterized in that said wire member made of an elastic alloy member is tapered at least at said distal end portion.
Claim 4
Dependent Claim
19 words
A guide wire according to claim 1, characterized in that said elastic alloy member comprises a very elastic alloy.
Claim 5
Dependent Claim
29 words
A guide wire according to claim 3, characterized in that said very elastic alloy is an alloy selected from the group consisting of Ni-Ti, Cu-Zn-AA, Cu-AZ-Ni, and Fe-Mn alloys.
Claim 6
Dependent Claim
56 words
5 . A catheter guide wire comprising a core member and a thermoplastic resin layer, said core member comprising an elastic alloy wire and being subjected to a heat treatment such that the flexibility thereof is sequentially increased from its proximal end portion to its distal end portion, said thermoplastic resin layer covering said core member.
Claim 7
Dependent Claim
56 words
5 . A catheter guide wire comprising a core member and a thermoplastic resin layer, said core member comprising an elastic alloy wire and being subjected to a heat treatment such that the flexibility thereof is sequentially increased from its proximal end portion to its distal end portion, said thermoplastic resin layer covering said core member.
Claim 8
Dependent Claim
29 words
A guide wire according to claim 5 , characterized in that said wire member comprising an elastic alloy member is tapered at least at a distal end portion thereof.
Claim 9
Dependent Claim
22 words
7 . A guide wire according to claim 5, characterized in that said elastic alloy member consists of a very elastic alloy.
Claim 10
Dependent Claim
29 words
A guide wire according to claim 5, characterized in that said very elastic alloy is an alloy selected from the group consisting of Ni-Ti, Cu-Zn-AQ, Cu-AZ-Ni, and Fe-Mn alloys.
Claim 11
Dependent Claim
32 words
A guide wire according to claim 5, characterized in that a flexible coil spring is mounted on an outer surface of at least a distal end portion of said thermoplastic resin layer.
Claim 12
Dependent Claim
34 words
A guide wire according to claim 9, characterized in that said coil spring is made of a material selected from the group consisting of stainless steel, platinum, a platinum alloy and a palladium alloy.
Claim 13
Dependent Claim
99 words
A catheter guide wire having leading and trailing end sides, wherein said guide wire comprises a wire member extending from said trailing end side to said leading end side and made of an elastic alloy member, said wire member being subjected to a heat treatment so that its flexibility is sequentially increased from a proximal to distal end portion of said leading end side, and a flexible coil spring having an outer diameter equal to or smaller than a minimum inner diameter of said catheter and mounted to surround at least said distal end portion of said wire member.
Claim 14
Dependent Claim
99 words
A catheter guide wire having leading and trailing end sides, wherein said guide wire comprises a wire member extending from said trailing end side to said leading end side and made of an elastic alloy member, said wire member being subjected to a heat treatment so that its flexibility is sequentially increased from a proximal to distal end portion of said leading end side, and a flexible coil spring having an outer diameter equal to or smaller than a minimum inner diameter of said catheter and mounted to surround at least said distal end portion of said wire member.
Claim 15
Dependent Claim
28 words
A guide wire according to claim 11, characterized in that said wire member made of an elastic alloy member is tapered at least at said distal end portion.
Claim 16
Dependent Claim
20 words
A guide wire according to claim 11, characterized in that said elastic alloy member consists of a very elastic alloy.
Claim 17
Dependent Claim
29 words
A guide wire according to claim 13, characterized in that said very elastic alloy is an alloy selected from the group consisting of Ni-Ti, Cu-Zn-Ah, cu-Aℓ-Ni, and Fe-Mn alloys.
Claim 18
Dependent Claim
34 words
A guide wire according to claim 11, characterized in that said coil spring is made of a member selected from the group consisting of stainless steel, platinum, a platinum alloy and a palladium alloy.
Claim 19
Independent Claim
81 words
A method of manufacturing a catheter guide wire fabricated by using an elastic alloy wire as a base material, wherein a leading end side of said base material is divided into a plurality of areas, and subjected to a heat treatment by changing the heat treatment temperature and time conditions in units of the areas so that the flexibility of said base material is sequentially increased from a proximal end portion to a distal end portion of said leading end side.
Claim 20
Independent Claim
81 words
A method of manufacturing a catheter guide wire fabricated by using an elastic alloy wire as a base material, wherein a leading end side of said base material is divided into a plurality of areas, and subjected to a heat treatment by changing the heat treatment temperature and time conditions in units of the areas so that the flexibility of said base material is sequentially increased from a proximal end portion to a distal end portion of said leading end side.
Claim 21
Dependent Claim
53 words
A method according to claim 16, characterized in that said base material is divided into proximal end, intermediate, and distal end portions, only said intermediate and distal end portions are subjected to a primary heat treatment under given conditions, and thereafter only the distal end portion is subjected to a secondary heat treatment.
References Cited (Backward Citations)
No citation records indexed.
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