Surgery – Blood drawn and replaced or treated and returned to body – Constituent removed from blood and remainder returned to body
Reexamination Certificate
2007-02-06
2007-02-06
Zalukaeva, Tatyana (Department: 3761)
Surgery
Blood drawn and replaced or treated and returned to body
Constituent removed from blood and remainder returned to body
C604S004010, C604S005010, C604S031000, C210S645000, C210S739000, C210S087000
Reexamination Certificate
active
10765149
ABSTRACT:
In the apparatus and method for monitoring a vascular access (6) of an extracorporeal circuit (5; 10) of a patient, a control and calculation unit (17) varies a flow rate of a blood pump (9) predisposed to cause blood to circulate in the extracorporeal circuit. The control and calculation unit receives the pressure values in the blood withdrawal line (5) and the blood return line (10) from two pressure sensors (8, 12); the pressure values are a series of different values of the blood flow rate. The control and calculation unit processes the data gathered by means of a mathematical model which describes the variation of pressure in the vascular access as a function of the flow rate, in order to determine the blood flow rate in the vascular access. The invention detects the presence and location of a stenosis at the vascular access of a patient subjected to a hemodialysis treatment.
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Cavalcanti Silvio
Fava Massimo
Lodi Carlo Alberto
Deak Leslie R.
Finnegan Henderson Farabow Garrett & Dunner LLP
Gambro Lundia AB
Zalukaeva Tatyana
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