Polymer covered vaso-occlusive devices and methods of producing such devices

a vaso-occlusive device and polymer technology, applied in the field of medical devices, can solve the problems of increasing the risk of cyanoacrylate use, increasing the difficulty of cyanoacrylate resins or glues to be recovered, and creating emboli in undesired areas, so as to improve the rate at which the implant is detachable

Inactive Publication Date: 2002-09-12
STRYKER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] An aspect of this inventive device is that the vaso-occlusive device may be radiopaque, e.g., a radiopaque inner core wire or the addition of a radiopaque additive added to the polymeric fiber. The device may also employ a detachable tip, e.g., mechanically detachable, electrolytically detachable, etc. Yet another variation of the invention is the use of an insulative or highly resistive member proximally of the coil. The resistive or insulating member may be any suitable material such as inorganic oxides, glues, polymeric inserts, polymeric coverings, etc. This insulative or highly resistive layer or joint appears to focus the current flow through the sacrificial electrolytic joint and thereby improves the rate at which detachment of the implant occurs.

Problems solved by technology

There are significant risks involved in use of a cyanoacrylates, because of the potential for misplacement.
Such a misplacement would create emboli in undesired areas.
Cyanoacrylate resins or glues are somewhat difficult, if not impossible, to retrieve once they are improperly placed.

Method used

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  • Polymer covered vaso-occlusive devices and methods of producing such devices
  • Polymer covered vaso-occlusive devices and methods of producing such devices
  • Polymer covered vaso-occlusive devices and methods of producing such devices

Examples

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Embodiment Construction

[0048] This invention involves vaso-occlusive devices which are at least partially wrapped with polymeric fiber and methods of producing those vaso-occlusive devices.

[0049] FIG. 1A shows a typical vaso-occlusive device (100) in which a wire (104) has been wrapped with a polymer (102) according to the procedures described herein. Vaso-occlusive device (100) is shown in FIG. 1 to comprise a primary shape of a helically wound coil (104) having tips (106) to ease the potential of the component wire to cause trauma in a blood vessel. The device is made up of a wire (104) which has been wrapped with a polymeric fiber (102). In the illustration of FIG. 1A, the fiber (102) is wrapped about the wire (104) with an open pitch. However, a closed pitch (not shown) is also contemplated. In this variation, the polymeric fiber (108) is displayed as a single filament. However, a multi-filament (not shown), such as a plurality of filaments joined together is also contemplated. The polymeric fiber (10...

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PUM

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Abstract

This is a medical device for forming an embolism within the vasculature of a patient. More particularly, it concerns an occlusion device comprising an inner core covered with a polymer. The medical device encourages cellular attachment and growth while maintaining favorable handling, deployment and visualization characteristics.

Description

[0001] This is a continuation of U.S. patent application Ser. No. 09 / 326,188, filed Jun. 4, 1999, entitled "Polymer Covered Vaso-Occlusive Devices and Methods of Producing Such Devices".FIELD OF THE INVENTION[0002] This invention relates to a medical device for forming an embolism within the vasculature of a patient. More particularly, it concerns an occlusion device comprising an inner core covered with a polymer. The device encourages cellular attachment and growth while maintaining favorable handling, deployment and visualization characteristics.BACKGROUND[0003] Vaso-occlusive devices are surgical implements that are placed within open sites in the vasculature of the human body. The devices are introduced typically via a catheter to the site within the vasculature that is to be closed. That site may be within the lumen of a blood vessel or perhaps within an aneurysm stemming from a blood vessel.[0004] There are a variety of materials and devices which have been used to create suc...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61B17/12
CPCA61B17/12022A61B17/12113A61B17/12145A61B17/1215A61B17/12154A61B2017/1205A61B2017/12063
InventorWALLACE, MICHAEL P.YIN HUI, DELILAH
OwnerSTRYKER CORP