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Method and device for sensing the detachment of the venous needle from a patient during an extracorporeal blood treatment in a dialysis machine

  • US 7,060,047 B2
  • Filed: 05/30/2002
  • Issued: 06/13/2006
  • Est. Priority Date: 06/15/2001
  • Status: Expired due to Term
First Claim
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1. A device for monitoring a cardiovascular access of a patient, comprising:

  • an extracorporeal blood circuit having a venous branch connected to a cardiovascular access of a patient;

    an electrical line external to said extracorporeal blood circuit and having a first branch connected to said venous branch and a second branch connected to the patient either directly or through earth;

    a voltage source located between said first branch and said second branch;

    a sensor located in said first branch or in said second branch for supplying a signal corresponding to an electric current; and

    means for processing said signal to determine the state of said cardiovascular access.

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