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Valve port assembly with interlock

  • US 6,565,525 B1
  • Filed: 05/28/1999
  • Issued: 05/20/2003
  • Est. Priority Date: 05/15/1997
  • Status: Expired due to Term
First Claim
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1. A method for establishing extracorporeal blood circulation from a patient'"'"'s vasculature, said method comprising:

  • (a) inserting a first access tube into a first subcutaneous port connected to a first cannula implanted in a blood vessel to withdraw blood from the blood vessel into extracorporeal circulation;

    (b) mechanically opening a first valve disposed between the first subcutaneous port and the first cannula in response to insertion of the first access tube into the first port;

    (c) inserting a second access tube into a second subcutaneous port connected to a second cannula implanted in a blood vessel to return blood from extracorporeal circulation to the blood vessel;

    (d) mechanically opening a second valve disposed between the second subcutaneous port and the second cannula in response to insertion of the second access tube into the second port, whereby a flow path from the second cannula to the second port is at least partly established; and

    (e) mechanically opening a third valve disposed between the first subcutaneous port and the first cannula in response to insertion of the second access tube into the second port, whereby a flow path from the first port to the first cannula is established.

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