WEARABLE DEVICE WITH FUNCTION OF DETERMINING HEMOGLOBIN CONCENTRATION, METHOD AND SYSTEM FOR DETERMINING HEMOGLOBIN CONCENTRATION Russian patent published in 2023 - IPC A61B5/1455 

FIELD: medicine.

SUBSTANCE: group of inventions relates to a method of determining the concentration of hemoglobin in the user’s blood, a wearable device and a system for determining the concentration of hemoglobin in the user’s blood. The device contains a photoplethysmographic PPG sensor and is designed to perform the method. When performing the method, a photoplethysmographic sensor is used to irradiate the user's biological tissue with radiation of two different wavelengths and detect photoplethysmographic signals in the time domain in reflection mode. The detected PPG signals are converted from the time domain to the frequency domain or time-frequency domain. The most significant signal, characterized by the highest signal-to-noise ratio, the highest amplitude and/or the least noise, is selected from all PPG signals and used as a reference signal. Harmonics are extracted from the reference signal and used as coordinates. All PPG signals are laid out along the mentioned coordinates to obtain a set of amplitude-phase characteristics of the harmonics. The concentration of hemoglobin in the user's blood is determined by comparing the resulting set of amplitude-phase characteristics of harmonics with sets of amplitude-phase characteristics of harmonics from the database, each of which corresponds to a specific value of hemoglobin concentration. The system comprises a wearable device and a remote server and/or cloud storage, a communication channel for transmitting data between the wearable device and the remote server and/or cloud storage.

EFFECT: method, wearable device, and a system for continuously monitoring hemoglobin concentration resistant to motion artifacts is provided.

32 cl, 16 dwg