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Filamentous embolic device with expansible elements

A component and embolization technology, applied in medical science, surgery, catheters, etc., can solve problems such as weak temporary bonding, and achieve the effect of low blood vessel rupture and highly controllable layout

Inactive Publication Date: 2008-10-08
MICROVENTION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since there is no mechanical connection between the pellet and the guidewire (rather a weaker temporary bond provided by the inhibitor), there is still the possibility that some pellets will be released and moved prematurely

Method used

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  • Filamentous embolic device with expansible elements
  • Filamentous embolic device with expansible elements
  • Filamentous embolic device with expansible elements

Examples

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Embodiment Construction

[0033] Embolization device. According to the present invention, in figure 1 , 2 A vaso-occlusive device 10 is shown in and 3 . In a preferred embodiment, embolic device 10 comprises a plurality of embolic bodies each configured as substantially cylindrical "microspheres" 12 spaced along a filamentary carrier 14 . The number of microspheres 12 can vary depending on the length of the carrier 14, which will depend on the size of the vascular site to be embolized. For large vascular sites, for example, 8 to 12 microspheres can be used, however, higher numbers can be used if desired. In some applications (eg, very small aneurysms), only 1 or 2 microspheres may be used.

[0034] The carrier 14 also carries a plurality of highly flexible microcoil spacers 16, each of which is placed between and separates a pair of microspheres 12. The carrier 14 has a distal portion carrying a longer distal microcoil segment 18 held in place by a distal retaining member 20 . Carrier 14 has a pr...

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Abstract

An embolization device includes a plurality of highly-expansible embolizing elements disposed at spaced intervals along a filamentous carrier. In a preferred embodiment, the carrier is a suitable length of very thin, highly flexible filament of nickel / titanium alloy. The embolizing elements are separated from each other on the carrier by radiopaque spacers in the form of highly flexible microcoils made of platinum or platinum / tungsten alloy. In a preferred embodiment, the embolizing elements are made of a hydrophilic, macroporous, polymeric, hydrogen foam material. The device is particularly suited for embolizing a vascular site such as an aneurysm. The embolization bodies have an initial configuration in the form of small, substantially cylindrical "micropellets" of small enough outside diameter to fit within a microcatheter. The bodies are hydrophilically expansible into an expanded configuration in which they substantially conform to and fill the vascular site while connected to the carrier.

Description

[0001] This application is a divisional application of Chinese Patent Application No.00813238.0 (PCT / US00 / 26926). Comparison with related applications [0002] This application is a continuation-in-part of co-pending application No. 09 / 410,970, filed October 4,1999. technical field [0003] The present invention relates to the field of methods and devices for embolizing vascular aneurysms and similar vascular abnormalities. More particularly, the present invention relates to embolization devices for insertion into a vascular site, such as an aneurysm, to form an embolism therein, and methods of embolizing a vascular site using the same. Background technique [0004] Embolization of blood vessels is desirable in a variety of clinical situations. For example, vascular embolization has been used to control vascular bleeding, to occlude blood supply to tumors, and to occlude vascular aneurysms, especially intracranial aneurysms. The use of vascular embolization to treat aneur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/12A61B17/00A61L29/00A61L31/02A61L31/14A61L31/18A61M25/00
CPCA61B17/12145A61B17/12154A61L31/145A61B2017/00867A61L31/022A61B17/12022A61L2430/36A61B17/12163A61B2017/00004A61B17/12113A61B2017/1205A61L31/18A61B17/1219
Inventor 乔治·R·小格林罗伯特·F·罗森布拉思布赖恩·J·考克斯
Owner MICROVENTION INC