Method and device for locating guidewire and treating chronic total occlusions

a technology of guidewires and total occlusions, applied in the field of medical devices and methods, can solve problems such as controllable atherectomy

Inactive Publication Date: 2001-10-18
TYCO HEALTHCARE GRP LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting shearing action is sufficiently aggressive for highly effective thrombectomy, while use of a rotatio

Method used

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  • Method and device for locating guidewire and treating chronic total occlusions
  • Method and device for locating guidewire and treating chronic total occlusions
  • Method and device for locating guidewire and treating chronic total occlusions

Examples

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Embodiment Construction

[0060] Referring now to FIG. 1, a vascular obstruction removal catheter 10 generally includes an elongate flexible catheter body 12 having a proximal end 14 and a distal end 16. Cooperating inner and outer shearing baskets 18, 20 define shearing means 19, and are disposed near distal end 16 of catheter body 12, while a proximal housing 22 is disposed near proximal end 14 of the catheter body. More specifically, outer basket 20 will typically be affixed at distal end 16 of catheter body 12, while a drive shaft drivingly couples inner basket 18 to a drive motor of proximal housing 22.

[0061] The inner and outer baskets 18, 20 of shearing means 19 are illustrated with some of the adjacent structures in FIG. 2, and in a simplified format (without some of the adjacent structures) in FIG. 3A. Outer basket 20 is shown without inner basket 18 in FIG. 4.

[0062] Each of the baskets 18, 20 includes a proximal portion 24, a distal portion 26, and an intermediate portion 28. Intermediate portion 2...

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Abstract

Devices, methods, kits, and methods remove obstructive material from the vasculature and other body lumens. Expansible baskets may be used as cooperating radially expansible shearing members. Helically oriented struts of each basket may wind in a uniform circumferential direction. The struts can be independently flexible, allowing the shearing members to flex axially together. The inner basket may be rotatably driven and may use an axial pump extending proximally from the shearing members and/or a distal penetrator for advancing into an occlusion which inhibits guidewire access. The struts may slide substantially continuously across each other, and may be sufficiently aggressive for highly effective thrombectomy. A rotationally static and axially flexible outer basket may provide a safe, limited atherectomy treatment.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001] The present application claims the benefit of priority from Provisional application Ser. No. 60 / 193,539 filed Mar. 31, 2000 (Attorney Docket No. 19744P-001000US), and from Provisional application Ser. No. 60 / 260,170 filed Jan. 4, 2001 (Attorney Docket No. 19744P-001200), the fall disclosures of which are incorporated herein by reference.[0002] 1. Field of the Invention[0003] The present invention relates generally to medical devices and methods. In one embodiment, the present invention relates to devices and methods for disrupting, collecting, and removing thrombus and / or other occlusive material from blood vessels and other body lumens. In other embodiments, the present invention relates to devices and methods for placement of guidewires, often for subsequent removal of unwanted tissue, thrombus, atheroma, fluid, polyps, cysts or other obstructive matter from natural and artificial body lumens such as blood vessels, grafts, implanted s...

Claims

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Application Information

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IPC IPC(8): A61B17/22A61B17/00A61B19/00A61M25/00A61M25/10
CPCA61B17/221A61B17/320725A61B17/320758A61B17/320783A61B2017/00685A61B2017/22094A61B2017/2212A61B2019/481A61B2090/08021
Inventor EVANS, MICHAEL A.DEMARAIS, DENISE M.LEEFLANG, STEPHEN A.EVERSULL, CHRISTIAN S.
Owner TYCO HEALTHCARE GRP LP
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