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:
Apr. 19, 2005
Filed:
Jun. 07, 2000
Olivier Elsenhans, Sins, CH;
Emad Sarofim, Hagendorn, CH;
Urban Georg Schnell, Muntschemier, CH;
Roche Diagnostics Corporation, Indianapolis, IN (US);
Abstract
A quality test of fluids of biological origin can be performed optically with applying a suitable evaluation method. In case of two components to be determined in a such fluid, an extinction spectrum is approximated in a first wavelength range by a combination of a merely theoretical curve and the spectrum of the pure first substance in a first wavelength range, and this evaluation is repeated in a second wavelength range this time by approximating the measured spectrum () by a combination of a hypothetical curve, the spectrum () of the first component with the already determined concentration, and the spectrum () of the pure second component. Furthermore, it is feasible to subtract the first and second spectrum and analyze the so obtained differential spectrum () in view of anomalies. The hypothetical curves are preferably straight lines which are defined by slope and ordinate section. In the praxis of the quality test of blood, bilirubin and hemoglobin may be quantitatively be determined, whilst the background together with the lipid component can be qualitatively examined by means of the differential spectrum.