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Visual electrode ablation systems

  • US 10,624,695 B2
  • Filed: 03/26/2014
  • Issued: 04/21/2020
  • Est. Priority Date: 05/11/2007
  • Status: Active Grant
First Claim
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1. A method of ablating a tissue region within a blood-filled environment, comprising:

  • restraining, with a hood, a fluid within a visualization field in a portion of the blood-filled environment, the hood having a plurality of support members extending from a base of the hood to bias the hood to a conical shape;

    injecting the fluid into the hood while extracting the fluid from the hood such that a rate at which the fluid is being injected is different than a rate at which the fluid is extracted;

    visualizing the tissue region through the fluid within the visualization field;

    forming a seal between the tissue region and an aperture of a distal membrane at a distal end of the hood such that the tissue region is pulled through the aperture proximally past the distal membrane; and

    while the aperture is sealed to the tissue region, with an electrode assembly positioned upon the support members, transmitting ablating electrical energy through the aperture, the aperture having a diameter that is less than an outer diameter of the distal membrane, the electrical energy being transmitted from the fluid into the visualized tissue region.

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