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Focused ultrasonic renal denervation

  • US 9,192,790 B2
  • Filed: 04/13/2011
  • Issued: 11/24/2015
  • Est. Priority Date: 04/14/2010
  • Status: Expired due to Fees
First Claim
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1. An apparatus, comprising:

  • a first catheter including a central shaft and an inflatable balloon, the first catheter configured for deployment within a vessel proximate innervated tissue that contributes to renal sympathetic nerve activity;

    a second catheter slidable relative to the first catheter;

    a spiral rail mounted on an outer surface of the central shaft adjacent a distal end of the central shaft within an interior volume of the inflatable balloon;

    an acoustic transducer provided at the distal end of the second catheter and dimensioned for deployment within the vessel proximate the innervated tissue, wherein the second catheter includes a keyed channel member that is disposed around an outer surface of the spiral rail such that the acoustic transducer is translated along a helical path as the acoustic transducer is distally advanced or proximally retracted;

    a focusing arrangement configured to focus acoustic energy outwardly beyond an inner wall of the vessel and into the innervated tissue at or proximate an outer wall of the vessel; and

    a controller configured to control the acoustic transducer for at least one of scanning tissue and ablating the innervated tissue.

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