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Electrosurgical apparatus and methods for ablating tissue

  • US 20040153057A1
  • Filed: 11/13/2003
  • Published: 08/05/2004
  • Est. Priority Date: 11/20/1998
  • Status: Active Grant
First Claim
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1. An electrosurgical instrument for removing tissue from a target site within or on a patient'"'"'s body comprising:

  • (a) a shaft having proximal and distal end portion and an active screen electrode on the distal end portion;

    (b) a return electrode arranged on the shaft spaced from the screen electrode;

    (c) at least one electrical connector extending through the shaft that connects the active electrode with a high frequency power supply;

    (d) at least one electrical coupling member adapted to secure the active screen electrode to the shaft and to electrically couple the screen electrode to the a least one electrical connector; and

    (e) an aspiration lumen within the shaft having a distal opening coupled to the single active electrode wherein the screen electrode inhibits clogging of the aspiration lumen.

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