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, C604S005040, C604S067000, C210S645000, C422S044000
Reexamination Certificate
active
10977995
ABSTRACT:
A method and a device for determining the blood flow QFin a vascular access (F) during an extracorporeal blood treatment is described, where the blood enters the blood treatment unit (3) of the blood treatment machine through an arterial branch (19) of an extracorporeal circulation loop (2) which is in fluid connection with the vascular access at an arterial connection. The blood is returned through a venous branch (21) of the extracorporeal circulation, which is in fluid connection with the vascular access at a venous connection (13). The blood flow in the vascular access is determined by measuring the pressure part, pven, in the arterial and/or venous branch of the extracorporeal circulation when the vascular access is open and interrupted, while the extracorporeal blood flow QBis varied. Then the fistula flow QFis determined from the measured values for the arterial and/or venous pressure while the vascular access is open and interrupted.
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Deak Leslie R.
Fresenius Medical Care Deutschland GmbH
Zalukaeva Tatyana
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