METHOD FOR NON-INVASIVE DETERMINATION OF THE CONTENT OF LIPIDS IN A PERSON Russian patent published in 2022 - IPC A61B5/1455 G01N21/35 

FIELD: measuring.

SUBSTANCE: invention relates to methods for non-invasive measurement of human biochemical components and pertains to a method for non-invasive determination of the content of lipids in a person. The method is implemented by sending radiation to the earlobe consecutively from three sources in the spectral ranges of 1,750±90 nm, 1,450±50 nm, and 1,300±50 nm. The content of lipids is calculated by the formula c = c_e(k ₁/k_w1 - 1) (k_1e/k_w1 - 1)^-1, wherein c_e is the known content of lipids in the standard, "k" are the measured and calculated absorption coefficients for the first source: k₁ for the earlobe,k_1e for the standard,k_w1 for water. The earlobe of an average healthy patient aged 20 to 30 years of different sexes, based on a representative sample of at least 20, is taken as a standard. The values of the absorption coefficient k_j based on the measured light emission intensity signals "I" are determined by the formula: k_j=k_w2{ln[1-(I₂/I_k)(I_0k/I₀₂)]}^-1ln[1- (I_j/I_k)(I_0k/I_0j)], wherein j are the indices for the first source: for the earlobe - 1, for the standard - 1e; k_w2 is the water absorption coefficient for the second source; 2 is the index of the measured signal from the second source output from the earlobe; k are the indices of the measured signals from a control source; 0 is the index of zero signals entering the earlobe.

EFFECT: simplification of the method and increase in the accuracy of measurement.

1 cl, 1 dwg, 1 tbl