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Steerable electrode catheter

  • US 5,611,777 A
  • Filed: 08/23/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 05/14/1993
  • Status: Expired due to Term
First Claim
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1. A deflectable tip steerable catheter comprising:

  • a control handle having a longitudinal axis therethrough and a proximal end and a distal end;

    a slideblock axially movably supported in the control handle;

    the slideblock having a distal part and a separate proximal part not fixedly connected to the slideblock distal part, an opening being defined in the distal part;

    a catheter shaft having a proximal end attached to the control handle distal end and having at least one passageway therethrough from the shaft proximal end to a shaft distal end;

    a deflectable tip portion having a proximal end attached to the shaft distal end, the tip portion also having a distal end and a longitudinal axis therethrough; and

    a pullwire attached to the deflectable tip portion near its distal end to a point spaced radially outwardly from the tip portion longitudinal axis, the pullwire extending proximally through the tip portion, through the catheter shaft portion passageway, into the control handle through its distal end, through the opening in the distal part of the slideblock, and being secured to the proximal part of the slideblock, whereby proximal displacement of the distal part of the slideblock within the control handle causes corresponding proximal travel of the proximal part of the slideblock and the pullwire within the control handle, but distal displacement of the distal part of the slideblock within the control handle causes no distal movement of the separate proximal part of the slideblock within the control handle.

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