The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 2016
Filed:
Apr. 20, 2015
B. Braun Avitum Ag, Melsungen, DE;
Miran Alic, Melsungen, DE;
Christof Strohhoefer, Kassel, DE;
Waldemar Janik, Hessisch Lichtenau, DE;
B. BRAUN AVITUM AG, Melsungen, DE;
Abstract
Methods and apparatus are disclosed for determining a substance in a fluid excreted/extracted from the body or spent dialysate, e.g., for determining a quality measure for the dialysis, such as the concentration of selected toxic substances, and/or for determining a removed total quantity of uremic toxins during a dialysis with a dialysis apparatus. A concentration of a substance in the fluid may be determined by: detecting, by an absorption sensor, a first extinction signal of the fluid at an analysis wavelength at a defined first pH value of the fluid; adjusting, by a pH adjusting device, a second pH value of the fluid which differs from the first pH value; detecting, by the absorption sensor, a second extinction signal of the fluid at the analysis wavelength at the second pH value; and processing/comparing the two extinction signals for the first and the second pH values and determining an absolute concentration of the substance dissolved in the fluid.