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US5725534: Method of manufacturing an assembly for positioning an embolization coil in the vascular system, and such an assembly

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Filing Information

Inventor(s) Erik Edelboe Rasmussen ·
Assignee(s) William Cook Europe A/S ·
Attorney/Agent(s) Richard J. Godlewski ·
Primary Examiner Robert A. Hafer ·
Assistant Examiner Benjamin K. Koo ·
Application Number US8484854
Filing date 06/07/1995
Issue date 03/10/1998
Predicted expiration date 06/07/2015
U.S. Classifications 606/108  · 128/772  ·
International Classifications A61B 1700  ·
Kind CodeA
International Classifications 606108 ·
Foreign Priority DK000595 - 01/03/1995 ·
8 Claims, No Drawings


Abstract

An assembly for positioning an embolization coil (4) in the vascular system. The assembly includes a guidewire having a relatively flexible distal section (6), which has a central core (7) and a threading coil (10), the distal turns (11) of which are arranged with such mutual spacing (12) that the embolization coil can be threaded in and out of the threading coil. The distal end section of the guidewire is manufactured with an elongated, rotationally symmetrical member, such as cylindrical member (13), and the peripheral surface of the member is provided with a bonding layer (25). Then the distal turns of the threading coil are positioned in the desired helical shape on the external side of the member, and the bonding layer is activated so that the distal turns are fixed to the member in this shape. The cylindrical member (13) has an outer diameter which is a fraction smaller than the inner diameter of the embolization coil (4) and has a length which is longer than the extent in the axial direction of the guidewire of at least three of the distal turns (11) of the threading coil. The distal turns of the threading coil are fixed to the external side of the member, so that the thread provided is geometrically stable and smooth-running.

Independent Claims | See all claims (8)

  1. 1. An assembly for positioning an embolization coil (4) in a vascular system, comprising a guidewire having a relatively flexible distal section (6), which has a central core (7) and a threading coil (10) having distal turns (11), which are arranged with such mutual spacing (12) that the embolization coil can be threaded in and out of the threading coil; wherein the distal section (6) of the guidewire has an elongated, rotationally symmetrical member (13) having an outer diameter, which is a fraction smaller than an inner diameter of the embolization coil, and having a length, which is longer than at least three of the distal turns (11) of the threading coil; and wherein the distal turns of the threading coil are fixed to an external side of the member; wherein the central core (7) in the flexible distal section (6) of the guidewire comprises the member, a proximal portion (14; 14') and an intermediate portion (15; 15') with a decreasing diameter towards the member (13); and wherein the threading coil is a distal end of a wirecoil (8), a proximal end of which is fastened to said proximal portion.

References Cited

U.S. Patent Documents

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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
FR2684305ELA MEDICAL SAJun 1993
WO199003760Apr 1990
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Other Publications

Lund, Gunnar, M.D. et al. "Detachable Steel Spring Coils for Vessel Occlusion"; Radiology; May 1985, p. 530.

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