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Hemodialysis or hemo(dia)filtration apparatus and a method for controlling a hemodialysis or hemo(dia)filtration apparatus

  • US 8,647,290 B2
  • Filed: 05/26/2008
  • Issued: 02/11/2014
  • Est. Priority Date: 05/26/2008
  • Status: Active Grant
First Claim
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1. 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.

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