Method and device for supply of a dialysis unit with dialysis fluid
AssigneeFresenius Medical Care Deutschland GmbH
InventorsGerard Remkes, Gerhard Wiesen
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Abstract
A method and a device for supply of a dialyser in a dialysis unit with dialysis fluid is disclosed. At least one dialysis fluid concentrate is mixed with water to produce the dialysis fluid. The dialysis fluid concentrate is prepared in a reservoir unit in a given amount. A control and arithmetic unit calculates the dialysis fluid rate (Qd) such that, after a given treatment time (TB) has passed, a given residual amount of dialysis fluid concentrate or no residual amount remains in the reservoir unit. It is preferable to empty the reservoir unit by the end of treatment.
Claims19
A method for supplying a dialyser of a dialysis unit with a dialysing fluid, the method comprising:
- making available at least one dialysing fluid concentrate in at least one receiving unit;
- making available water for diluting the at least one dialysing fluid concentrate;
- mixing the at least one dialysing fluid concentrate and the water in a first pre-set volumetric ratio to prepare the dialysing fluid;
- and
- setting a dialysing fluid flow rate Qdb over a pre-set treatment time TB at a value, which depends upon the presence of a pre-set volume of the at least one dialysing fluid concentrate at a commencement of a dialysis treatment time, the first pre-set volumetric ratio, and the pre-set treatment time TB during the dialysis treatment, such that at the end of the dialysis treatment time the at least one receiving unit is either empty or contains a pre-set residual volume of the at least one dialysing fluid concentrate,
- wherein the at least one receiving unit contains only said at least one dialysing fluid concentrate.
A method for supplying a dialyser of a dialysis unit with a dialysing fluid, wherein a dialysis treatment time equals a pre-set time interval TB1 plus a remaining dialysis treatment time TB2, the method comprising:
- making available at least one dialysing fluid concentrate in at least one receiving unit;
- making available water for diluting the at least one dialysing fluid concentrate;
- mixing the at least one dialysing fluid concentrate and the water in a first pre-set volumetric ratio to prepare the dialysing fluid;
- and
- supplying the dialysing fluid to the dialyser at a pre-set dialysing fluid flow rate Qdb1 over the pre-set time interval TB1 such that an amount of the at least one dialysing fluid concentrate remaining in the at least one receiving unit at the end of the pre-set time interval TB1 can be calculated from the pre-set volume of the at least one dialysing fluid concentrate at the commencement of the dialysis treatment time and an amount of the at least one dialysing fluid concentrate used up during the dialysis treatment time;
- and
- setting a dialysing fluid flow rate Qdv over the remaining dialysis treatment time TB2 which depends upon a volume of the at least one dialysing fluid concentrate in the at least one receiving unit at the end of the pre-set time interval TB1, the first pre-set volumetric ratio, and the remaining dialysis treatment time TB2, such that at the end of the dialysis treatment the at least one receiving unit is either empty or contains the pre-set residual volume of the at least one dialysing fluid concentrate,
- wherein the at least one receiving unit contains only said at least one dialysing fluid concentrate.
An apparatus for supplying a dialyser of a dialysis unit with a dialysing fluid, the apparatus comprising:
- at least one receiving unit for receiving only at least one dialysing fluid concentrate;
- means for providing water for a dilution of the at least one dialysing fluid concentrate;
- means for mixing the at least one dialysing fluid concentrate and the water in a first pre-set volumetric ratio to prepare the dialysing fluid, said means for mixing connected to the at least one receiving unit and configured to receive the at least one dialysing fluid concentrate therefrom;
- a control and calculating unit configured to set a dialysing fluid flow rate Qdb during a dialysis treatment such that at the end of the pre-set treatment period TB, the at least one receiving unit is either empty or contains a pre-set residual volume of the at least one dialysing fluid concentrate;
- wherein the dialysing fluid flow rate Qdb is dependent upon a pre-set volume of the at least one dialysing fluid concentrate at a commencement of a dialysis treatment period, the first pre-set volumetric ratio, and the pre-set treatment period TB, and
- wherein data describing the pre-set volume of the at least one dialysing fluid concentrate at a commencement of a dialysis treatment period and/or the first pre-set volumetric ratio, and/or the pre-set treatment period are deposited in the form of a barcode on the receiving unit.
Dependencies are inferred from the claim text.