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Apparatus for thermal treatment of tissue

  • US 5,993,447 A
  • Filed: 08/16/1996
  • Issued: 11/30/1999
  • Est. Priority Date: 08/16/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for thermal treatment of tissue, which comprises:

  • an elongate portion dimensioned for insertion within a narrow body passage, the elongate portion including;

    a delivery catheter having proximal and distal end portions, and a memory portion at the distal end portion thereof, the memory portion comprised of shape memory material and defining an arcuate configuration when in a normal unstressed condition;

    an electromagnetic probe disposed within and electrically isolated from the delivery catheter and longitudinally moveable relative to and within the delivery catheter between a first position contained within the delivery catheter and a second position wherein at least a probe end portion thereof extends beyond the delivery catheter and within tissue, the electromagnetic probe being adapted to follow the arcuate configuration of the memory portion of the delivery catheter in the normal unstressed condition, the electromagnetic probe including a first outer electrode and a second inner electrode disposed within the outer electrode, the second inner electrode extending beyond the first outer electrode, the probe being connectable to a thermal energy source; and

    a handle portion connected to the elongate portion, the handle portion including a single actuating portion operatively connected to the electromagnetic probe, the actuating portion moveable to move the electromagnetic probe including the first outer electrode and the second inner electrode between the first and second positions.

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