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Rapid exchange catheter

  • US 5,387,226 A
  • Filed: 01/14/1994
  • Issued: 02/07/1995
  • Est. Priority Date: 01/14/1994
  • Status: Expired due to Term
First Claim
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1. An elongate balloon dilatation catheter comprising:

  • a shaft portion having a proximal end and a distal end;

    a mono-rail guide section adjacent said distal end of said shaft portion, said mono-rail guide section including an axial passage communicating with a guidewire port through which an elongate guide wire may pass to be exposed outwardly of said catheter proximally of said mono-rail guide section, said axial passage defining a mono-rail length for said catheter;

    an expansible dilatation balloon positioned about said mono-rail guide section; and

    a mono-rail sheath member slidably movable axially along said shaft portion proximal of said dilatation balloon, said sheath member comprising a proximal end, a distal end, and a guidewire port positioned between said proximal and distal ends;

    wherein said sheath member is slidably movable along said shaft portion between a first position sheathing the guide wire proximally of said mono-rail guide section and cooperating therewith to effectively increase the mono-rail length of the catheter and a second position in which said sheath member port is aligned with said guidewire port of said shaft portion to allow the guidewire to be exposed outwardly of said catheter and said sheath member proximally of said aligned ports.

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