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Method and apparatus for creating a virtual electrode used for the ablation of tissue

  • US 6,315,777 B1
  • Filed: 07/06/1999
  • Issued: 11/13/2001
  • Est. Priority Date: 07/07/1998
  • Status: Expired due to Term
First Claim
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1. A surgical apparatus for creating a virtual electrode to ablate bodily tissue, the surgical apparatus comprising:

  • an inner tube defining a proximal portion and a distal portion, the distal portion forming a plurality of orifices including a proximal-most orifice and a distal-most orifice for distributing a conductive solution from the inner tube and further forming an electrode; and

    an outer tube coaxially disposed about the inner tube, the outer tube defining a proximal end and a distal end and forming a slot proximal the distal end, wherein the outer tube is slidable relative to the inner tube and a longitudinal spacing between a distal side of the slot and the distal end is not less than a longitudinal distance between the proximal-most and distal-most orifices such that a portion of the outer tube distal the slot selectively, simultaneously blocks the plurality of orifices.

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