Multiple antenna ablation apparatus and method

  • US 5,672,174 A
  • Filed: 01/16/1996
  • Issued: 09/30/1997
  • Est. Priority Date: 08/15/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. An ablation treatment apparatus, comprising:

  • a multiple antenna device including a primary antenna with a lumen, a longitudinal axis, a distal end sufficiently sharp to pierce tissue and an energy delivery surface with a length L1, and a secondary antenna at least partially positioned in the primary antenna as the primary antenna is introduced through tissue and a secondary antenna distal portion deployable at a selected tissue site with an energy delivery surface of length L2 that is at least equal to 1/3 L1, wherein at least a portion of the secondary antenna has at least one radius of curvature when introduced from the primary antenna; and

    a cable coupled to the multiple antenna device.

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