| 摘要 |
The method and the device according to the invention are used for the non-invasive measurement of concentrations of blood components. At least one light source generates light using spectrophotometry and the light is guided to at least one photodetector through a tissue present at the location of application and supplied with pulsating blood. At least the measuring signal of the photodetector is guided to an evaluation unit. The light signals of a first, second, third to (n+1)<SUP>st </SUP>wavelength are generated at subsequent pairwise times T 1 and T 2 , T 3 and T 4 and T 5 and T 6 to T<SUB>n </SUB>and T<SUB>n+1</SUB>. The evaluation unit takes into consideration the received signals of the photodetector for all wavelengths according to a defined arithmetic pattern and determines a concentration of the blood component. The inventive device comprises at least three light sources that generate light of different wavelength in relation to each other. The evaluation unit is provided with an arithmetic unit for carrying out logarithms, divisions, multiplications, additions and subtractions. The inventive method is especially used for determining the total hemoglobin concentration C<SUB>Hb </SUB>and for determining physiological substances that are iatrogenically applied to the area that is supplied with pulsating blood. |
