Patent ID: 8647290

Claim:
A hemodialysis or hemo(dia)filtration apparatus, comprising: a blood treatment device having a blood chamber and a fluid chamber which are separated from one another by a semipermeable membrane; an extracorporeal blood circuit having an arterial line for blood removal from an individual and a venous line for blood return to the individual, the arterial line and the venous line being connected to an inlet and, respectively, to an outlet of the blood chamber; a blood movement device configured for moving the blood along the extracorporeal circuit; at least a venous pressure sensor configured for emitting a venous pressure signal indicating a pressure in the venous line; a fluid circuit having at least a discharge line connected to an outlet of the fluid chamber; an ultrafiltration device configured for ultrafiltering plasmatic liquid from the blood chamber to the fluid chamber across the semipermeable membrane; an infusion circuit having at least a first supply line of an infusion fluid connected to the extracorporeal blood circuit; an infusion fluid supply device configured to provide a supply of the infusion fluid along the first supply line; a control unit programmed to perform the following operations: determining an occurrence of a halt or slow-down or start or speed-up of the supply of the infusion fluid to the extracorporeal blood circuit; and passing from a first command mode of the blood movement device to a second command mode of the blood movement device by effect of said occurrence of a halt or slow-down or start or speed-up, wherein the blood movement device is, in the second command mode, controlled on a basis of a comparison between said venous pressure signal and at least a set point value.