FIELD: medical equipment.
SUBSTANCE: group of inventions relates to a method for non-invasive detection of a tissue element of a human body and a device for its implementation, as well as to a wearable device. Incident optical radiation of a predetermined wavelength is emitted to the detectable place. For each predetermined wavelength, intensity values of optical radiation emitted from the surface of the detectable site are obtained based on the photosensitive surface of the detection module by photoelectric conversion. The photosensitive surface is located at a predetermined distance from the center of the incident radiation. According to the intensity values, the concentration of the tissue element to be detected is determined. Intensity values are obtained based on M≥2 annular photosensitive surfaces. The photosensitive surface is in one-to-one correspondence with the values of the optical radiation intensity. The inner diameter of each annular photosensitive surface is greater than or equal to 0.5 mm and less than or equal to 6 mm. The ring width of each annular photosensitive surface is greater than or equal to 0.05 mm and less than or equal to 0.3 mm. For each predetermined wavelength, two intensity values are determined. A differential operation is performed on the two intensity values to obtain a differential value of the optical radiation intensity at a predetermined wavelength. The concentration of the tissue element is determined according to the differential intensity values. A wearable device for wearing at a detectable site contains a main part, on which a non-invasive detection device for a tissue element of a human body is provided.
EFFECT: increased accuracy of non-invasive detection of tissue elements and exclusion of the influence of common-mode noise information on the detection result.
10 cl, 19 dwg
