METHOD AND DEVICE FOR MEASURING TARGET SUBSTANCE CONCENTRATION IN BLOOD Russian patent published in 2021 - IPC A61B5/00 

FIELD: medical technology.

SUBSTANCE: invention relates to medical technology. A non-invasive test device is described for determining the concentration of a target substance (such as blood sugar, blood alcohol, cholesterol, etc.) in a patient's blood. The device includes applying an RF output signal to the patient's skin through an antenna and measuring the amplitude and phase of the response signal, which is a function of the RF output signal modified by interaction with the patient's blood. The device takes measurements at different RF output frequencies and displays the response as a frequency function. The invention is essentially characterized by obtaining various derived parameters from the shape of the resulting plots, namely any or more of the following: resonant frequency shift; Q-factor (quality factor) of resonance; group delay; phase shift; change in amplitude; graph form factor; and the gradient of the graph at different frequencies. The invention uses models of derived parameters depending on the concentration of the target substance in the blood to determine the latterThe invention uses models of derived parameters depending on the target substance concentration in the blood to determine the latter.

EFFECT: non-invasive test device is provided for determining the concentration of a target substance (such as blood sugar, blood alcohol, cholesterol, etc.) in a patient's blood.

20 cl, 22 dwg