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Method and apparatus for advancing catheters through occluded body lumens

  • US 5,366,443 A
  • Filed: 10/09/1992
  • Issued: 11/22/1994
  • Est. Priority Date: 01/07/1992
  • Status: Expired due to Term
First Claim
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1. A catheter system comprising:

  • a catheter body having a proximal end and a distal end;

    an electrode array disposed near the distal end of the catheter body, said array including a plurality of electrically isolated electrode terminals disposed over a contact surface which is forwardly disposed to contact an occluding surface in a body lumen as the catheter is advanced through the lumen;

    a common electrode; and

    means for supplying high frequency power to said electrode array, wherein current flow to each individual electrode terminal is selectively limited or disrupted when a low resistance path exists between said electrode terminal and the common electrode.

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