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System for bi-directionally controlling the cryo-tip of a cryoablation catheter

  • US 20050288656A1
  • Filed: 06/24/2004
  • Published: 12/29/2005
  • Est. Priority Date: 06/24/2004
  • Status: Active Grant
First Claim
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1. A system for steering a catheter through the vasculature of a patient using bi-directional control, said system comprising:

  • a tubular catheter structure having a proximal end and a distal end;

    a clockwise (CW) reel;

    a first pull wire having a first end attached to said catheter structure and a second end attached to said CW reel, said first pull wire for deflecting said catheter structure distal end in a first direction in response to a rotation of said CW reel about a rotation axis;

    a counterclockwise (CCW) reel;

    a second pull wire having a first end attached to said catheter structure and a second end attached to said CCW reel, said second pull wire for deflecting said catheter structure distal end in a second direction in response to a rotation of said CCW reel about the rotation axis, with the second direction being substantially coplanar and opposite to the first direction; and

    a means operable on said CW and CCW reels for applying a tension to said first pull wire to deflect said catheter structure distal end in the first direction and thereafter for delaying an application of tension to said second pull wire until at least a portion of said tension on said first pull wire is selectively released to respectively deflect said catheter structure distal end from the first direction to the second direction.

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