Method for analysis of a medical sample
First Claim
1. A method for analysis of a liquid medical sample with the aid of an analysis instrument, said method comprising:
- an analytical measurement step for the determination of a measurable variable, said measurable variable being characteristic of an analytical value of the sample in an optical cuvette, said cuvette containing a test fluid, said test fluid comprising an aliquot part of the sample and reagents which are a part of a reagent system which is specific for the analysis of the sample, said analytical measurement step comprising reacting the sample and the reagents to cause a measurable temperature dependent change in the test fluid, and measuring said measurable change as the measurable variable;
a temperature measuring step wherein an optical absorption of said test fluid of unknown temperature is measured in the optical cuvette by irradiating the test fluid with at least two wavelengths within the NIR-range between 800 nm and 2500 nm, and the temperature is determined by comparing absorption data obtained in the temperature measuring step with a calibration data set relating to a temperature dependence of the optical absorption of the test fluid,said calibration data set being generated in a temperature calibration step in which the optical absorption of a calibrator fluid, different from the test fluid and having a known temperature, is determined at various temperatures at at least two wavelengths.
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Abstract
A method for the analysis of a medical sample, particularly a body fluid, with the aid of an analyzing instrument, in which a test fluid, which contains an aliquot part of the sample and reagents, is in an optical cuvette and the temperature of the test fluid is determined in the cuvette. In order to determine the temperature of the test fluid directly and without contact, in a temperature calibration step the optical absorption of a calibrator fluid is determined at various temperatures at at least two wavelengths within the NIR range in order to obtain a calibration data set relating to the temperature-dependency of the optical absorption. In a temperature-measuring step the optical absorption of a test fluid of unknown temperature is measured at the same wavelengths and its temperature is determined by comparison of the absorption data obtained in the measuring step with the calibration data set.
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Citations
11 Claims
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1. A method for analysis of a liquid medical sample with the aid of an analysis instrument, said method comprising:
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an analytical measurement step for the determination of a measurable variable, said measurable variable being characteristic of an analytical value of the sample in an optical cuvette, said cuvette containing a test fluid, said test fluid comprising an aliquot part of the sample and reagents which are a part of a reagent system which is specific for the analysis of the sample, said analytical measurement step comprising reacting the sample and the reagents to cause a measurable temperature dependent change in the test fluid, and measuring said measurable change as the measurable variable; a temperature measuring step wherein an optical absorption of said test fluid of unknown temperature is measured in the optical cuvette by irradiating the test fluid with at least two wavelengths within the NIR-range between 800 nm and 2500 nm, and the temperature is determined by comparing absorption data obtained in the temperature measuring step with a calibration data set relating to a temperature dependence of the optical absorption of the test fluid, said calibration data set being generated in a temperature calibration step in which the optical absorption of a calibrator fluid, different from the test fluid and having a known temperature, is determined at various temperatures at at least two wavelengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification