PORTABLE DEVICE AND METHOD FOR NON-INVASIVE MEASUREMENT OF BLOOD ELEMENTS Russian patent published in 2023 - IPC G01N33/49 

FIELD: medical equipment.

SUBSTANCE: group of inventions relates to a device and method for non-invasive measurement of blood elements. The method comprises the steps of irradiating the analyzed area of the subject's body with at least two beams of light using at least two narrow-band coherent radiation sources with different wavelengths, detecting at least one response of backscattered coherent radiation from blood and tissue elements, which is at least one interference signal from each of the at least two narrowband coherent radiation sources. Using at least one photodetector, the detected interference signals are filtered in accordance with a given signal frequency band, in which the interference beat frequencies characterizing the dynamics of blood elements are localized. Using the filter, analog-to-digital sampling of filtered signals is carried out with a frequency corresponding to a given frequency band of the filtered signal with generation of discrete filtered signals. A set of spectral-temporal signs of signals is extracted from discrete filtered signals and the concentration of blood elements is calculated by means of a processing unit, based on the obtained set of spectral-temporal features of signals in accordance with the functional dependencies of the obtained set of spectral-temporal features and determined concentrations of blood elements. The portable device for implementing the above method contains, respectively, at least two narrow-band coherent radiation sources, at least one photodetector, a filter, an analog-to-digital converter, a control unit and a processing unit connected thereto.

EFFECT: inventions make it possible to increase the accuracy of measurements due to high spectral resolution.

24 cl, 9 dwg