Surgery – Instruments – Means for inserting or removing conduit within body
Patent
1995-06-07
1998-03-10
Hafer, Robert A.
Surgery
Instruments
Means for inserting or removing conduit within body
128772, A61B 1700
Patent
active
057255342
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.
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Lund, Gunnar, M.D. et al. "Detachable Steel Spring Coils for Vessel Occlusion"; Radiology; May 1985, p. 530.
Godlewski Richard J.
Hafer Robert A.
Koo Benjamin K.
William Cook Europe A/S
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