Method for regulating the supply of substituate during extracorporeal blood treatment and extracorporeal blood treatment device comprising a unit for regulating the supply of substituate
The invention relates to a method for regulating the supply of substituate during an extracorporeal blood treatment using an extracorporeal blood treatment device, which comprises a dialyser (1) that is divided by a semi-permeable membrane (2) into a blood chamber (3) and a dialysis liquid chamber (4), and a unit (19) for supplying substituate. Furthermore, the invention relates to a device for extracorporeal blood treatment comprising a unit (26) for regulating the supply of substituate. The method according to the invention and the device according to the invention are based on the fact that the regulation of the supply of substituate during the extracorporeal blood treatment is effected according to the rheological load of the dialyser. In order to regulate the supply of substituate during the extracorporeal blood treatment, the rheological load on the dialyser is determined from the trans-membrane pressure at the dialyser and the flow resistance of the dialyser, and the substituate rate is increased or reduced in accordance therewith. It is therefore no longer necessary to specify dialyser parameters or blood parameters, and distinguishing between pre-dilution and post-dilution is also obsolete.
