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Ultrasonic catheter power control

  • US 9,943,675 B1
  • Filed: 09/04/2014
  • Issued: 04/17/2018
  • Est. Priority Date: 04/01/2002
  • Status: Active Grant
First Claim
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1. A method of treating an occlusion at a treatment site within a patient'"'"'s vasculature comprising:

  • providing an ultrasonic catheter having a distal region with an outer diameter less than about 5 French, a proximal region opposite the distal region, a fluid delivery lumen having at least one opening in the distal region, and an ultrasound radiating member positioned within the distal region;

    positioning the ultrasonic catheter at the treatment site, such that at least a portion of the distal region is within the occlusion;

    passing a therapeutic compound through the fluid delivery lumen such that the therapeutic compound is delivered to the treatment site;

    emitting ultrasonic energy from the ultrasound radiating member, wherein the emitted ultrasonic energy has;

    an amplitude that is periodically varied between a low amplitude and a high amplitude, andan in situ intensity at an energy radiating surface of between approximately 20 watts in

    2
    and approximately 90 watts in

    2
    .

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