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Vasculature occlusion device detachment system with tapered corewire and heater activated fiber detachment

  • US 9,782,178 B2
  • Filed: 09/19/2014
  • Issued: 10/10/2017
  • Est. Priority Date: 09/19/2014
  • Status: Expired due to Fees
First Claim
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1. A vasculature occlusion device detachment system comprising:

  • a heating element of a predetermined resistivity;

    the heating element having a proximal end and an opposite distal end;

    a coil securing suture having a distal end and an opposite proximal end;

    the proximal end of the coil securing suture terminating in a proximal bead retained within the heating element while the distal end of the coil securing suture extends beyond the distal end of the heating element;

    the coil securing suture being rotatable, independently of the heating element, 360 degrees about a longitudinal axis extending therethrough the heating element;

    an electrically conductive corewire having a proximal end and an opposite distal end;

    the distal end of the electrically conductive corewire being, connected to the proximal end of the heating element; and

    an insulated, electrically conductive wire separate from the electrically conductive corewire;

    the insulated electrically conductive wire having a proximal end and an opposite distal end;

    the distal end of the insulated electrically conductive wire being secured to the heating element at a heating-element-to-conductive wire connection;

    wherein the heating element comprises a helically wound coil comprising a plurality of windings forming a proximal end, an opposite distal end and a central lumen defined longitudinally therethrough from the proximal to the distal end of the helically wound coil;

    extending distally from the distal end of the helically wound coil is a substantially straight trailing section of coil bent backwards and threaded through the central lumen towards the proximal end of the helically wound coil foaming a primary distal loop disposed in a distal direction beyond the distal end of the helically wound coil;

    a terminating end of the straight trailing section of the heating element extends beyond the proximal end of the helically wound coil;

    the primary distal loop is bent approximately 90 degrees from an axial plane of the helically wound coil to configure a pre-formed heating element distal loop;

    wherein the proximal bead is disposed entirely within the pre-formed heating element distal loop, not in the central lumen of the helically wound coil.

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