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Directional microwave ablation instrument with off-set energy delivery portion

  • US 7,115,126 B2
  • Filed: 04/15/2002
  • Issued: 10/03/2006
  • Est. Priority Date: 10/23/1998
  • Status: Expired due to Fees
First Claim
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1. A directional ablation instrument for ablation of a targeted tissue, comprising:

  • a transmission line having a distal end and a proximal portion suitable for connection to an electromagnetic energy source;

    an elongated antenna having an end coupled to the distal end of the transmission line, the elongated antenna adapted to generate an electric field sufficiently strong to cause tissue ablation of the targeted tissue; and

    an elongated antenna assembly including a conductive structure disposed about the antenna and having a window therein for directing a majority of the electric field through the window in substantially one radial direction with respect to a central axis of the elongated antenna assembly, the elongated antenna being fixedly located within the elongated antenna assembly with a central axis of the elongated antenna off-set from the central axis of the elongated antenna assembly toward the window therein.

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