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Apparatus and methods for ablation efficacy

  • US 9,814,522 B2
  • Filed: 04/06/2011
  • Issued: 11/14/2017
  • Est. Priority Date: 04/06/2010
  • Status: Active Grant
First Claim
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1. An apparatus for ablating a tissue region having irregular anatomy, comprising:

  • an elongate catheter having a distal end and a flexible length; and

    a hood attached to the distal end and having a low-profile shape and a deployed shape, wherein the hood includes a distal edge and defines an open area when in the deployed shape which is in fluid communication with an environment external to the hood through an aperture of a distal membrane coupled to the distal edge of the hood,wherein the distal membrane includes a distal surface extending between the distal edge of the hood and a proximal end of an elongated conduit feature, the elongated conduit feature extendable distally from the distal surface between a collapsed configuration and an extended configuration and having a smaller outer diameter than the distal edge of the hood in both a fully extended configuration and the collapsed configuration, wherein the elongated conduit feature has a distal end that defines the aperture having a diameter which is less than a diameter of the hood such that a purging fluid introduced into the open area from the catheter is urged through the aperture of the elongated conduit feature and into the environment.

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