CA2617284A1 - Guidewire having linear change in stiffness - Google Patents

Guidewire having linear change in stiffness Download PDF

Info

Publication number
CA2617284A1
CA2617284A1 CA002617284A CA2617284A CA2617284A1 CA 2617284 A1 CA2617284 A1 CA 2617284A1 CA 002617284 A CA002617284 A CA 002617284A CA 2617284 A CA2617284 A CA 2617284A CA 2617284 A1 CA2617284 A1 CA 2617284A1
Authority
CA
Canada
Prior art keywords
longitudinal section
guidewire
length
core member
elongate core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002617284A
Other languages
French (fr)
Other versions
CA2617284C (en
Inventor
Wayne E. Cornish
James Jacobs
Marc M. Jalisi
Mark Richardson
John Schreiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Abbott Cardiovascular Systems Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA2617284A priority Critical patent/CA2617284C/en
Priority claimed from CA002352314A external-priority patent/CA2352314C/en
Publication of CA2617284A1 publication Critical patent/CA2617284A1/en
Application granted granted Critical
Publication of CA2617284C publication Critical patent/CA2617284C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09058—Basic structures of guide wires
    • A61M2025/09083—Basic structures of guide wires having a coil around a core
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09108—Methods for making a guide wire
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/0915—Guide wires having features for changing the stiffness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09166—Guide wires having radio-opaque features

Abstract

The invention is directed to a guidewire having a distal section with multiple distally tapered core segments with at least two contiguous distally tapering core segments in which the most distal tapered core segment preferably has a greater degree of taper than the proximally contiguous tapered core segment. The invention is also directed to an elongated intracorporeal device, preferably a guidewire or section thereof, that has a core member or the like with a plurality of contiguous tapered segments having taper angles that are configured to produce a linear change in stiffness over a longitudinal section of the device. The device may also have a core section with a continuously changing taper angle to produce a curvilinear profile that preferably is configured to produce a linear change in stiffness of the core over a longitudinal section of the device.

Claims (32)

1. An intracorporeal device comprising an elongated member having a substantially linear change in stiffness over a longitudinal length thereof.
2. The device of claim 1 wherein the length of the elongated member has a continuously changing taper angle producing a curvilinear profile that is configured to produce the substantially linear change in stiffness over said length.
3. The device of claim 1 wherein the elongated member has a plurality of tapered segments configured to produce the substantially linear change in stiffness over the length of the member.
4. The device of claim 3 wherein each tapered segment has a substantially constant taper angle.
5. The device of claim 3 wherein the elongate core member comprises at least 3 to about 100 tapered segments.
6. The device of claim 3 wherein the elongate core member comprises about 5 to about 20 tapered segments.
7. The device of claim 1 wherein the elongated core member comprises a material with changing hardness in a longitudinal direction configured such that the change in hardness produces a substantially linear change in stiffness along the length of the core member.
8. The device of claim 1 wherein the elongated member is about 1 to about 50 cm in length.
9. The device of claim 1 wherein the elongated member is about 10 to about 25 cm in length.
10. The device of claim 1 wherein the elongated member tapers distally to a more flexible distal portion.
11. A guidewire comprising an elongate core member with at least one longitudinal section having a substantially linear change in stiffness over a length thereof.
12. The guidewire of claim 11 wherein the longitudinal section of the elongate core member has a continuously changing taper angle yielding a curvilinear profile configured to produce a substantially linear change in stiffness over the length of the longitudinal section.
13. The guidewire of claim 11 wherein the longitudinal section of the elongate core member has a plurality of tapered segments.
14. The guidewire of claim 13 wherein each tapered segment has a substantially constant taper angle with the tapered segments being configured to produce a substantially linear change in stiffness over the length of the section.
15. The guidewire of claim 13 wherein the elongate core member of the longitudinal section comprises about 3 to about 100 tapered segments.
16. The guidewire of claim 13 wherein the elongate core member of the longitudinal section comprises about 5 to about 20 tapered segments.
17. The guidewire of claim 11 wherein the longitudinal section further comprises a material with changing hardness in a longitudinal direction configured such that the change in hardness produces a substantially linear change in stiffness along the length of the section.
18. The guidewire of claim 11 wherein the longitudinal section is about 1 to about 50 cm in length.
19. The guidewire of claim 11 wherein the longitudinal section is about 10 to about 25 cm in length.
20. The guidewire of claim 12 wherein the longitudinal section substantially follows the formula where D L is the diameter of the elongate core member at length L from a position of starting diameter Do, E is the modulus of elasticity of the core member material, and C is a constant that depends on the boundary conditions of the longitudinal section.
21. The guidewire of claim 13 wherein the longitudinal section further comprises transition points between adjacent tapered segments and the diameter of the elongate core member at the transition points substantially follows the formula where D L is the diameter of the elongate core member at length L from a position of starting diameter Do, E is the modulus of elasticity of the core member material, and C is a constant that depends on the boundary conditions of the longitudinal section.
22. The guidewire of claim 12 wherein the longitudinal section substantially follows the formula where I L is the moment of inertia of the longitudinal section at length L
from a position of starting inertia Io, E is the modulus of elasticity of the longitudinal section, and C is a constant that depends on the boundary conditions of the longitudinal section.
23. The guidewire of claim 13 wherein the longitudinal section further comprises transition points disposed between adjacent tapered segments and the moment of inertia of the longitudinal section at the transition points substantially follows the formula where I L is the moment of inertia of the longitudinal section at length L
from a position of starting inertia Io, E is the modulus of elasticity of the longitudinal section, and C is a constant that depends on the boundary conditions of the longitudinal section.
24. The guidewire of claim 11 wherein the longitudinal section tapers distally to a more flexible distal portion.
25. The guidewire of claim 11 wherein the longitudinal section tapers proximally to a more flexible proximal portion.
26. The guidewire of claim 11 further comprising a constant taper section of the elongate core member adjacent the longitudinal section.
27. The guidewire of claim 26 wherein the constant taper section is proximally adjacent the longitudinal section.
28. The guidewire of claim 27 further comprising a distal segment having a substantially constant diameter disposed distally adjacent the longitudinal section.
29. A guidewire comprising an elongate core member having at least one longitudinal section with a continuously changing taper angle yielding a curvilinear profile.
30. The guidewire of claim 29 wherein the longitudinal section tapers distally to a reduced transverse dimension.
31. The guidewire of claim 29 wherein the longitudinal section has a length of about 1 to about 100 cm.
32. The guidewire of claim 29 wherein the longitudinal section has a length of about to about 25 cm.
CA2617284A 1998-12-01 1998-12-01 Guidewire having linear change in stiffness Expired - Fee Related CA2617284C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2617284A CA2617284C (en) 1998-12-01 1998-12-01 Guidewire having linear change in stiffness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002352314A CA2352314C (en) 1998-12-01 1998-12-01 Guidewire having linear change in stiffness
CA2617284A CA2617284C (en) 1998-12-01 1998-12-01 Guidewire having linear change in stiffness

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002352314A Division CA2352314C (en) 1998-12-01 1998-12-01 Guidewire having linear change in stiffness

Publications (2)

Publication Number Publication Date
CA2617284A1 true CA2617284A1 (en) 2000-06-08
CA2617284C CA2617284C (en) 2010-10-12

Family

ID=39367244

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2617284A Expired - Fee Related CA2617284C (en) 1998-12-01 1998-12-01 Guidewire having linear change in stiffness

Country Status (1)

Country Link
CA (1) CA2617284C (en)

Also Published As

Publication number Publication date
CA2617284C (en) 2010-10-12

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Effective date: 20181203