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Method of using a readily exchangeable perfusion dilatation catheter

  • US 6,451,043 B1
  • Filed: 11/18/1996
  • Issued: 09/17/2002
  • Est. Priority Date: 02/07/1990
  • Status: Expired due to Fees
First Claim
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1. A method of performing an intravascular procedure wherein a patient'"'"'s artery is occluded, comprising:

  • a) disposing within the patient'"'"'s vasculature a guiding catheter having a proximal end, a distal ends a port in the distal end, and an inner lumen extending between the proximal and distal ends, with the distal end of the guiding catheter being disposed proximal to a location within the patient'"'"'s artery where the procedure is to be performed;

    b) slidably disposing a guidewire within the inner lumen of the guiding catheter with a distal extremity of the guidewire extending out of the port in the distal end of the guiding catheter and beyond a desired arterial location where the procedure is to be performed;

    c) providing an elongated intravascular catheter having proximal and distal shaft sections, an expandable occluding member on the distal shaft section, a distal guidewire port in a distal end of the catheter, a proximal guidewire port spaced proximal to the expandable occluding member and at least 12 cm proximally of the distal end, a relatively short guidewire receiving lumen extending between the distal guidewire port and the proximal guidewire port, a relatively long inner lumen which has a proximal section with a transverse cross-section, and which has a distal section with a transverse cross-section, the distal section being much shorter than the proximal section, the distal section having a transverse cross-sectional area that is substantially less than the transverse cross-sectional area of the proximal section and extending at least about 10 cm proximally from the expandable occluding member, and a first plurality of proximal perfusion ports in the distal shaft section in fluid communication with the short guidewire receiving inner lumen positioned between the proximal guidewire port and the expandable occluding member and a second plurality of distal perfusion ports in the distal shaft section in fluid communication with the short guidewire receiving inner lumen positioned between the expandable occluding member and the distal end of the catheter shaft;

    d) mounting the intravascular catheter onto the guidewire with the guidewire slidably;

    disposed within the short guidewire receiving inner lumen of the intravascular catheter;

    e) advancing the intravascular catheter within the patient'"'"'s arterial system over the guidewire until the expandable occluding member on the intravascular catheter is disposed at the location where the procedure is to be performed, the proximal guidewire port being disposed within the inner lumen of the guiding catheter and the portion of the intravascular catheter having perfusion ports extending outside the port in the distal end of the guiding catheter and into the patient'"'"'s artery;

    f) expanding the expandable occluding member on the intravascular catheter to at least. partially occlude the patient'"'"'s artery, thereby causing blood to flow from the patient'"'"'s artery into the guidewire receiving inner lumen through the plurality of proximal perfusion ports, through the inner lumen and out the plurality of distal perfusion ports distal to the catheter; and

    g) contracting the expanded expandable member to facilitate removal of the catheter from the patient over the guidewire.

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