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Multi-layer coaxial vaso-occlusive device

A technology for occlusion and blood vessels, applied in the field of three-layer or three-element coaxial vascular occlusion devices, can solve the problems of reduced flexibility, reduced trackability, and lack of optimal pushability, etc., to achieve the reduction of contact area and lower resistance Effect

Inactive Publication Date: 2011-02-23
MICROVENTION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, depending on the configuration and material of the expandable elements, the flexibility of the device may be reduced
These factors may result in a device that is not yet optimally pushable (resistance to buckling) and has reduced trackability (as described above)

Method used

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  • Multi-layer coaxial vaso-occlusive device
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  • Multi-layer coaxial vaso-occlusive device

Examples

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Embodiment Construction

[0027] see Figure 1-Figure 4 , a vaso-occlusive device 10 according to a preferred embodiment of the present invention comprises three elongated coaxial elements: an inner element 11, a non-metallic intermediate element 12, and a non-expandable outer element 13 covering at least a portion of the intermediate element. The intermediate element 12 is in close contact with both the inner element 11 and the outer element 13 .

[0028]The inner element 11 is formed from a flexible elongated body or wire, preferably from a body visible under various medical imaging means such as X-ray, Magnetic Resonance Imaging (MRI) or ultrasound material. The inner element 11 is preferably formed from a length of wire made from a variety of biocompatible radiopaque metals such as platinum, tantalum, tungsten, gold, titanium, nitinol, Made of any metal in stainless steel, ELgiloy (cobalt-chromium-nickel) or other alloys known in the art. Alternatively, the inner member may be made of non-metall...

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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 a preferred embodiment, when the intermediate element is expanded, it proturdes 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 depolyed through a microcatherter, thereby reducing the likelihood of buckling while maintaining excellent flexibility. The result is a device with enhanced pushability and trackability when deployed through a microcatheter.

Description

[0001] CROSS REFERENCE TO RELATED APPLICATIONS [0002] This application is a continuation-in-part of co-pending application Ser. No. 10 / 631,981; filed on July 31, 2003, the prior application requiring serial number filed on July 31, 2002 is Rights arising under 35 U.S.C. Section 119(e) of Provisional Application 60 / 400,013, the disclosure of which is incorporated herein by reference. [0003] Federally funded research or development [0004] Not applicable. technical field [0005] The present invention relates to vaso-occlusive devices, such as vaso-occlusive coils and similar devices, for the embolization of aneurysms and similar vascular lesions. In particular, the present invention relates to improvements over existing two-layer or two-element coaxial vaso-occlusive devices, particularly those with polymeric coatings or overlays. In particular, the present invention relates to a three-layer or three-element coaxial vascular occlusion device that provides improved durab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/12
Inventor G·马丁内斯
Owner MICROVENTION INC
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