Method for adjusting a continuous dialysate volume flow in a dialysis machine and dialysis machine
First Claim
1. A method for adjusting a dialysate volume flow in a dialysis machine with at least one discontinuous pump and a controller for generating a desired volume flow of the dialysate as pumped by said at least one pump over a pump cycle, said pump cycle including a plurality of pump strokes performed sequentially, said method comprising the steps of:
- determining a first constant energy value for a first pump stroke of the at least one pump in said pump cycle;
operating the at least one pump over the first pump stroke with the first constant energy value;
determining a constant energy value for each subsequent pump stroke in said pump cycle and operating the at least one pump at the constant energy value determined for said each subsequent pump stroke, the constant energy value for said each subsequent pump stroke being adapted over the pump cycle based on at least one of volume and pressure values measured during at least one previous pump stroke of said plurality of pump strokes.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is provided for adjusting a continuous dialysate volume flow in a dialysis machine with at least two discontinuous pumps and a controller for generating a desired volume flow of the dialysate. The energy for driving the pumps is set to be constant with a value determined corresponding to the pump-time volume of the respective pump stroke and the delivered volume. A dialysis machine for carrying out the aforementioned method is also provided.
-
Citations
16 Claims
-
1. A method for adjusting a dialysate volume flow in a dialysis machine with at least one discontinuous pump and a controller for generating a desired volume flow of the dialysate as pumped by said at least one pump over a pump cycle, said pump cycle including a plurality of pump strokes performed sequentially, said method comprising the steps of:
-
determining a first constant energy value for a first pump stroke of the at least one pump in said pump cycle; operating the at least one pump over the first pump stroke with the first constant energy value; determining a constant energy value for each subsequent pump stroke in said pump cycle and operating the at least one pump at the constant energy value determined for said each subsequent pump stroke, the constant energy value for said each subsequent pump stroke being adapted over the pump cycle based on at least one of volume and pressure values measured during at least one previous pump stroke of said plurality of pump strokes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for adjusting a dialysate volume flow in a dialysis machine with at least one discontinuous pump and a controller for generating a desired volume flow of the dialysate as pumped by said at least one pump over a pump cycle, said pump cycle including a plurality of pump strokes performed sequentially, said method comprising:
-
for each pump stroke of said plurality of pump stokes in the pump cycle, performing the following steps; determining a constant energy value for the pump stroke; operating the at least one pump over the pump stroke with the constant energy value; determining whether a pressure during the pump stroke exceeds a pressure limit value; and wherein a first constant energy value for a first pump stroke in the pump cycle is taken from a lookup table and, for each subsequent pump stroke in the pump cycle, the constant energy value is adapted depending on whether the pressure limit value was exceeded in a previous pump stroke of said plurality of pump strokes. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification