Blood pressure measurement device, vehicle device, and blood pressure measurement program

Abstract

The purpose of the present invention is to measure the blood pressure of a living body in a non-contact and non-invasive manner. An experimental device (1) irradiates a subject (7) with microwaves from a transmission antenna (23) and a reception antenna (25) receives the reflected waves. Since the phase of the reflected wave varies with micro-movements of the body surface caused by the heartbeat, a pulse wave can be detected from the difference in phase between the emitted wave and the reflected wave. Additionally, the experimental device (1) continuously detects the blood pressure of the subject (7) from a blood pressure sensor (5) mounted on the subject (7) while continuously detecting the pulse wave. A frequency spectrum of the pulse wave of the subject (7) is generated by Fourier transformation of the pulse wave. A comparison of the spectrum and the blood pressure of the subject (7) detected by the blood pressure sensor (5) reveals a statistically significant positive correlation of the systolic blood pressure with an eighth harmonic wave from among frequency components of the pulse wave. On the basis of the experimental result, a device can be achieved which detects a pulse wave of a subject in a non-contact and non-invasive manner using microwaves, and which measures the systolic blood pressure using the correlation.

Description

technical field [0001] The present invention relates to a blood pressure measurement device, a vehicle device, and a blood pressure measurement program, for example, to a device for measuring blood pressure based on a pulse wave. Background technique [0002] In recent years, as health tendencies have improved due to declining birthrates and aging populations, blood pressure measurement in daily life has been emphasized from the viewpoint of disease prevention and early detection. [0003] In blood pressure measurement methods, for example, there are non-invasive methods that directly or indirectly measure pulse wave velocity, pulse wave acceleration, etc. and convert them into blood pressure by wearing a dedicated device on the arm, fingertip, etc., or a balloon, etc. Invasive methods that are directly inserted into blood vessels, etc. [0004] In particular, the non-invasive method puts less load on the human body than the invasive method, so research is being actively ca...

AI Technical Summary

Problems solved by technology

[0010] In this technology, in a quiet state where the subject is lying on the bed, for example, microwaves are irradiated to two predetermined parts of the arm, and there are restrictions on its use in daily life, and it is difficult to use it in vehicles in particular.

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