Method for filling and rinsing a set of blood lines
AssigneeFresenius Medical Care Deutschland GmbH
InventorMax Fischer
Life of this patent
Estimating the term…
Abstract
A method for the filling and flushing of a blood tube set including a pump segment for a blood pump, an arterial line connected to an inlet of a dialyzer, a venous line connected to an outlet of a dialyzer, a substituate line connected to a substitute port and having a pump segment for a substitute pump, and a three-way connector connected to the arterial line, the venous line and a rinse port. The method includes the steps of opening the rinse port, filling and simultaneously flushing the arterial and venous lines with the substituate supplied from the substitute line via the substitute pump, while substituate is drained off via the rinse port, closing the rinse port, and circulating the substituate in the circuit of arterial line, dialyzer and venous line by the blood pump.
Claims27
An extracorporeal blood treatment machine comprising:
- a blood pump;
- a substituate pump;
- a control unit including software for controlling the blood pump and the substituate pump;
- wherein a blood tubing set that includes a pump segment for the blood pump, an arterial line connected to an inlet of a dialyser, a venous line connected to an outlet of the dialyser, a substituate line having a pump segment for the substituate pump, and a three-way connector connected to the arterial line and the venous line is connectable to the blood treatment machine for at least one of filling and flushing;
- and
- said control unit being programmed to automatically control the blood pump and the substituate pump during the at least one of filling and flushing such that substituate is supplied by control of the substituate pump by the control unit in an amount of m+n via the substituate line to a suction side of the blood pump while the blood pump is controlled by the control unit to transport an amount n, drawn from the amount m+n of the substituate supplied by the substituate pump, through the arterial line or the venous line to the three-way connector such that, simultaneously with transport of the amount n, an amount m of substituate flows to the three-way connector through the other of the arterial line or the venous line in another direction, while an amount m+n of substituate is drained off via the three-way connector.
An extracorporeal blood treatment machine comprising:
- a blood pump;
- a substituate pump;
- a control unit including software to control the blood pump and the substituate pump;
- wherein a blood tubing set that includes a pump segment for the blood pump, an arterial line connected to an inlet of a dialyser, a venous line connected to an outlet of the dialyser, a substituate line having a pump segment for the substituate pump, and a three-way connector connected to the arterial line and the venous line is connectable to the blood treatment machine for at least one of filling and flushing;
- said control unit being programmed to automatically control the blood pump and the substituate pump during at least one of filling and flushing such that substituate is supplied from the substituate pump via the substituate line, said blood pump being controlled by the control unit to pump substituate in an amount n for circulation in the circuit of arterial line, dialyser and venous line, while the substituate pump is controlled by the control unit to supply an amount m of additional substituate via the substituate line downstream of the blood pump in the circuit of the arterial line, dialyser and venous line, such that an amount n+m of substituate flows through the dialyser, an amount m of substituate being drained off via the three-way connector and an amount n not drained off flowing back to the blood pump for circulation.
Dependencies are inferred from the claim text.