METODO E DISPOSITIVO DI RILEVAMENTO DELL'ACCESSO AL SISTEMA CARDIOVASC OLARE IN UN TRATTAMENTO EXTRACORPOREO DEL SANGUE IN UNA MACCHINA DI DI

摘要

A device 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 ), comprises: a voltage generator ( 16 ) for generating a potential difference between a part of the machine ( 1 ) and a first point (B) of a venous branch ( 8 ) of the extracorporeal circuit ( 2 ), connecting the patient to the treatment device ( 4 ); a detector ( 17 ) for detecting the value (dV) of a quantity that correlates with the electric current along at least one section ( 10 a ; 10 b ; 10 c) of the venous branch ( 10 ) between the first point (B) and a venous needle ( 13 ) fitted at the end of the venous branch ( 8 ) and inserted in the vascular system of the patient (P); calculating means ( 15 ) for comparing the detected value (dV) with a reference range (I).