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Variable steerable catheters and methods for using them

  • US 20050197623A1
  • Filed: 02/17/2005
  • Published: 09/08/2005
  • Est. Priority Date: 02/17/2004
  • Status: Abandoned Application
First Claim
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1. An apparatus for introduction into a body lumen, comprising:

  • a tubular member comprising a proximal end, a distal end sized for introduction into a body lumen, and a passage extending along a steerable distal portion of the tubular member, the passage comprising a first region substantially aligned with a center of modulus of the distal portion and a second region offset from the center of modulus;

    a steering element slidably disposed through the passage extending along the distal portion, the steering element comprising a proximal end disposed adjacent to the tubular member proximal end, and a distal end coupled to the tubular member distal end beyond the distal portion; and

    a steering adjustment member slidably disposed within the passage for selectively directing a portion of the steering element between the first and second regions, thereby changing a bending moment applied to the distal portion when an axial force is applied to the proximal end of the steering element.

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