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Method and device for monitoring the access to the cardiovascular system of a patient

  • US 20030036719A1
  • Filed: 12/21/2001
  • Published: 02/20/2003
  • Est. Priority Date: 12/28/1999
  • Status: Active Grant
First Claim
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1. Method for monitoring the access to the cardiovascular system of a patient undergoing an extracorporeal treatment of blood in a machine (1) comprising a treatment device (4) and an extracorporeal circuit (2) having an arterial branch (8) and a venous branch (10), the arterial branch (8) having a filter end fitted with an arterial needle (12) to be inserted in the vascular system of the patient and a second end connected to an inlet of the treatment device (4), and the venous branch (10) having a first end connected to an outlet of the treatment device (4) and a second end fitted with an venous needle (13) to be inserted in the vascular system of the patient, the method being characterized in that it comprises the steps of:

  • generating a potential difference between a first point (B) of the venous branch (10) and a part of the machine (1);

    detecting the value (dV) of a quantity that correlates with the electric current along at least one section (10a;

    10b;

    10c) of the venous branch (10) between the first point (B) and the venous needle (13); and

    comparing the detected value (dV) with a reference range (I).

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