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Device for extracorporeal blood treatment

  • US 9,700,662 B2
  • Filed: 04/29/2014
  • Issued: 07/11/2017
  • Est. Priority Date: 05/02/2013
  • Status: Active Grant
First Claim
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1. A device for extracorporeal blood treatment of blood of a patient, comprising:

  • a filter element which is subdivided into a blood-sided chamber and a dialysis liquid-side chamber and comprises an inflow for dialysis liquid to the dialysis liquid-side chamber and an outflow for the dialysis liquid from the dialysis liquid-side chamber,a fluid line coupled to the outflow for the dialysis liquid, wherein the fluid line is configured to conduct used dialysis liquid from the dialysis liquid-side chamber via the outflow,a bypass line selectively establishing a fluid connection between the inflow of the dialysis liquid-side chamber and the fluid line, the fluid connection bypassing the filter element, and a valve arranged on the fluid line downstream of the dialysis liquid-side chamber and upstream of the bypass line and further comprisinga detection equipment arranged on the fluid line downstream from the outflow of the dialysis liquid from the dialysis liquid-side chamber and between the valve and the dialysis liquid-side chamber, wherein the detection equipment is adapted to measure a concentration and/or concentration change of at least one metabolic product from the blood of the patient in the used dialysis liquid, and wherein the detection equipment is further configured to output measurement values corresponding to the measured concentration and/or concentration change of the at least one metabolic product,whereinthe fluid line has a fixed internal filling volume starting from the outflow from the filter element and ending with the detection equipment, andthe detection equipment is arranged on the fluid line at a position downstream of the outflow of the dialysis liquid from the dialysis liquid-side chamber of the filter element, which position fulfills at least one of the following requirements;

    a) the fixed internal filling volume of the fluid line is less than or equal to 100 ml;

    orb) the length of the fluid line starting from the outflow from the filter element to the detection equipment is at most 250 cm;

    such that diffusive degeneration of the concentration and/or the concentration change of the at least one metabolic product, and/or temporal delay of measurements by the detecting equipment, is avoided.

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