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Method of placing a cannula

  • US 6,120,494 A
  • Filed: 06/09/1999
  • Issued: 09/19/2000
  • Est. Priority Date: 01/23/1998
  • Status: Expired due to Term
First Claim
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1. A method for inserting a cannula in a blood vessel, the method comprising:

  • providing a cannula assembly including a cannula, a dilator, a needle and a guide wire, the dilator being telescopically received in a lumen of the cannula and having a passage formed therein, the needle and the guide wire being disposed in the passage of the dilator, the dilator further including a dilator tip being disposed at a distal end and having an opening formed therein;

    advancing the cannula assembly with the needle extended through the opening of the dilator tip a predetermined distance through the outer wall of the blood vessel, the needle forming an incision in the blood vessel;

    retracting the needle from the dilator tip;

    extending the guide wire through the opening of the dilator tip and into the incision;

    advancing the dilator and cannula over the guide wire and into the incision; and

    removing the dilator, needle and guide wire from the cannula.

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