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Rotational catheter with extended catheter body drive shaft support

  • US 10,448,922 B2
  • Filed: 12/11/2013
  • Issued: 10/22/2019
  • Est. Priority Date: 12/13/2012
  • Status: Active Grant
First Claim
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1. Medical sensing catheter apparatus comprising:

  • an elongated flexible sheath comprising a distal end and a proximal end;

    an elongated flexible drive structure longitudinally extending through an interior of said sheath and being movable relative thereto, said drive structure comprising a distal end portion with a sensor disposed thereon, wherein the sensor is operative to generate signals useable to create diagnostic information with respect to a patient body area;

    an elongated flexible tubular inner catheter member arranged externally to said sheath, said inner catheter member being distally and proximally movable along said sheath between fully extended and fully retracted positions thereon;

    an elongated flexible tubular outer catheter member arranged externally onto said elongated flexible tubular inner catheter member, said outer catheter member comprising a proximal end secured to a stationary support structure, and a distal end secured to an annular coupling, wherein the annular coupling is secured to said sheath at a location intermediate said distal and proximal ends of said sheath, wherein the elongated flexible tubular inner catheter member is distally telescoped externally onto a proximal end portion of said sheath extending proximally through said outer catheter member; and

    wherein an inner catheter member diameter is less than an outer catheter member diameter and the inner catheter member slidably extends through an O-ring member, said O-ring member located in an interior of the stationary support structure,wherein an outer diameter and a length of the annular coupling is smaller than an outer diameter and a length of the stationary support structure, andwherein the distal end of the elongated flexible sheath is positioned distally of the annular coupling and is configured to be inserted into the patient body area.

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