Three-part coaxial vaso-occlusive device

An occlusion device, vascular technology, applied in the field of improved, three-layer or three-component coaxial vascular occlusion devices with a polymer outer layer or wrapping device, which can solve the problem of unsatisfactory results

Inactive Publication Date: 2005-09-21
MICROVENTION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] There has therefore been a long-standing need, but still unsatisfactory results, for a microcoil vaso-occlusive device that has all the advantages of a microcoil vaso-occlusive device of the expandable member type, with enhanced propulsion and followability, and good Durability

Method used

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  • Three-part coaxial vaso-occlusive device
  • Three-part coaxial vaso-occlusive device
  • Three-part coaxial vaso-occlusive device

Examples

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Embodiment Construction

[0022] Referring to FIGS. 1-4, in accordance with a preferred embodiment of the present invention, a vaso-occlusive device 10 comprises three elongated coaxial members: an inner central member 11, a non-metallic intermediate member 12, and a non-expandable outer covering at least a portion of the intermediate member. Part 13. The middle part 12 is in intimate contact with both the inner part 11 and the outer part 13 .

[0023] The inner member 11 is made of elastic elongated filaments or wires, preferably of a material that is visible under various medical imaging devices such as X-ray, MRI, or ultrasound. Preferably, the inner part 11 is made of wire made of any biocompatible, radiopaque metal, such as platinum, tantalum, tungsten, gold, titanium, nitinol, stainless steel, Elgiloy Non-magnetic alloys (cobalt-chromium-nickel), or other alloys known in the art. Alternatively, it can be made of or include non-metallic materials, such as polymers, collagens, proteins, drugs, an...

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Abstract

A vaso-occlusive device includes inner, intermediate, and outer elements arranged coaxially. The inner element is a filamentous element, preferably a microcoil. The intermediate element is made of a non-metallic material, preferably an expansile polymer. The outer element is substantially non-expansile and defines at least one gap or opening through which the intermediate element is exposed. In apreferred embodiment, when the intermediate element is expanded, it protrudes through the at least one gap or opening in the outer element and assumes a configuration with an undulating, convexly-curved outer surface defining a chain of arcuate segments, each having a diameter significantly greater than the diameter of the outer element. The expanded configuration of the intermediate element minimizes friction when the device is deployed through a microcatheter, thereby reducing the likelihood of buckling while maintaining excellent flexibility. The result is a device with enhanced pushabilityand trackability when deployed through a microcatheter.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. Section 119(e) to co-pending U.S. Provisional Application Serial No. 60 / 400,103, filed July 31, 2002, the contents of which are incorporated herein by reference. [0003] Federally funded research or development [0004] no application Background technique [0005] The present invention relates to vaso-occlusive devices, such as vaso-occlusive coils and the like, for embolization of vascular aneurysms and similar vascular abnormalities. In particular, the present invention is an improvement over existing two-layer or two-component coaxial vaso-occlusive devices, particularly those having a polymeric outer layer or wrap. Specifically, the present invention is a three-layer or three-component coaxial vaso-occlusive device that provides improved durability, propulsion, and followability in microcatheters. The property of so-called "followability" refers to the ease with wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/00A61B17/12G06K9/00
CPCA61B2017/1205A61B17/12022A61B2017/12054A61B17/1215A61B2017/00004A61B2017/00867A61B2017/0084A61B17/1219
Inventor 乔治·马丁尼兹
Owner MICROVENTION INC
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