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EP0784991A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Stiff catheter guidewire with flexible distal portion

Assignee: Cordis Corp
•
Filing: 1997-01-21
•
Granted: —
•
Expires: 2017-01-21
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Abstract

Abstract A catheter guidewire has a relatively flexible distal portion to facilitate the steering of the guidewire through the cardiovascular system of a subject and the capability of the guidewire to reach a deposit region within a relatively tortuous portion of the cardiovascular system. The guidewire also has a relatively stiff proximal portion to facilitate the pushing of the guidewire through the cardiovascular system from an entry point of the subject. For one embodiment, the guidewire includes a corewire and a sleeve secured to the corewire such that the sleeve surrounds a proximal portion of the corewire. The sleeve is formed from a material having a relatively greater stiffness than the material for the corewire. The sleeve may be formed from stainless steel, for example, to provide for a relatively stiff proximal portion of a corewire formed from a material exhibiting superelastic properties, such as a nickel-titanium or Nitinol alloy for example.

Inventors

  • 👤 Fernando M. Viera

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 06:31
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09175

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 50 words
A guidewire comprising: a) an elongated corewire formed from a first material; and b) an elongated sleeve secured to the corewire such that the sleeve surrounds at least a portion of the corewire, the sleeve being formed from a second material having a relatively greater stiffness than the first material.
Claim 2
Dependent Claim 12 words
The guidewire of claim 1, wherein the first material exhibits superelastic properties.
Claim 3
Dependent Claim 16 words
The guidewire of claim 2, wherein the first material includes an alloy having nickel and titanium.
Claim 4
Dependent Claim 17 words
The guidewire of any one of claims 1 to 3, wherein the second material includes stainless steel.
Claim 5
Dependent Claim 18 words
The guidewire of any one of claims 1 to 4, wherein the sleeve is generally cylindrical in shape.
Claim 6
Dependent Claim 43 words
The guidewire of any one of claims 1 to 5, wherein: the corewire includes a proximal segment and at least one segment that tapers towards a distal end of the corewire; and the sleeve surrounds at least a portion of the proximal segment.
Claim 7
Dependent Claim 28 words
The guidewire of any one of claims 1 to 6, including a spring secured to the corewire such that the spring surrounds a distal segment of the corewire.
Claim 8
Dependent Claim 15 words
The guidewire of any one of claims 1 to 7, in combination with a catheter.
Claim 9
Independent Claim 63 words
A method for fabricating a guidewire, comprising the steps of: a) providing an elongated corewire formed from a first material; b) providing an elongated sleeve formed from a second material having a relatively greater stiffness than the first material; c) surrounding at least a portion of the corewire with the sleeve; and d) securing the sleeve to the corewire to fabricate the guidewire.
Claim 10
Dependent Claim 21 words
The method of claim 9 whih is used to fabricate a guidewire according to any one of claims 1 to 7.

References Cited (Backward Citations)

US5267574A Cited
US5402799A Cited

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