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Fistula flow disruptor methods

  • US 8,790,365 B1
  • Filed: 03/25/2014
  • Issued: 07/29/2014
  • Est. Priority Date: 07/29/2013
  • Status: Active Grant
First Claim
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1. A method of disrupting flow through a fistula, the method comprising:

  • advancing a microcatheter through a guide catheter, the guide catheter having a distal end at a first point in vasculature, the microcatheter having a distal end;

    advancing a steerable microwire through the guide catheter, the steerable microwire extending distal to the distal end of the microcatheter;

    after advancing the steerable microwire through the guide catheter, further advancing and steering the steerable microwire to a second point in the vasculature, the fistula being proximate to the second point in the vasculature;

    after further advancing and steering the steerable microwire, advancing the microcatheter over the steerable microwire to the second point in the vasculature;

    after further advancing the microcatheter over the steerable microwire to the second point in the vasculature, removing the steerable microwire;

    advancing a flow disruptor through the microcatheter to the second point in the vasculature, the flow disruptor comprising, in an expanded state;

    a first bulb having a first braid angle,a second bulb,a first neck between the first bulb and the second bulb,a third bulb,a second neck between the second bulb and the third bulb,a fourth bulb having a second braid angle, the second neck having a third braid angle less than the first braid angle and the second braid angle, anda third neck between the third bulb and the fourth bulb;

    expanding the first bulb and the second bulb on a first side of the fistula;

    extending the second neck through the fistula; and

    expanding the third bulb and the fourth bulb on a second side of the fistula.

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