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APPARATUS FOR EXTRA-CORPOREAL BLOOD TREATMENT AND METHOD OF PRESETTING AN INITIAL MODE OF TREATMENT FOR AN EXTRA-CORPOREAL BLOOD TREATMENT APPARATUS

  • US 20130327713A1
  • Filed: 06/06/2013
  • Published: 12/12/2013
  • Est. Priority Date: 06/06/2012
  • Status: Active Grant
First Claim
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1. An apparatus for extra-corporeal blood treatment having an extra-corporeal blood circuit which includes a first chamber of a dialyser or filter, which is divided into the first chamber and a second chamber by a semi-permeable membrane, and a blood pump configured for feeding blood through the first chamber of the dialyser or filter, and having a fluid system which includes the second chamber of the dialyser or filter, the apparatus comprising:

  • a dialysis-fluid pump configured for feeding dialysis fluid through the second chamber of the dialyser or filter, and a shut-off member configured for interrupting fluid flow into the second chamber of the dialyser or filter, wherein the dialysis-fluid pump and the shut-off member are configured so that in a first operating mode, ultrafiltrate is withdrawn from the second chamber of the dialyser or filter and the fluid flow into the second chamber of the dialyser or filter is interrupted and, in a second operating mode, dialysis fluid is fed through the second chamber of the dialyser or filter;

    a substituate pump configured for feeding substituate into the extra-corporeal blood circuit upstream or downstream of the dialyser or filter; and

    a control and computing unit having means for presetting an initial mode of treatment only during an opening phase of the treatment, the means for presetting the initial mode of treatment being configured such that;

    within a preset first interval of time, the substituate pump is operated such that substituate is fed to the extra-corporeal blood circuit at a preset substituate flow rate or a preset progression of the substituate flow rate;

    the dialysis-fluid pump and the shut-off member are operated in the first operating mode over the preset first interval of time, ultrafiltrate thus being withdrawn from the second chamber of the dialyser or filter when the fluid flow into the second chamber of the dialyser or filter is interrupted; and

    on expiry of the preset first interval of time, a switch is made to a mode of treatment which follows on from the initial mode of treatment and in which the dialysis-fluid pump and the shut-off member are operated in the second operating mode, dialysis fluid thus being fed through the second chamber of the dialyser or filter.

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