Sphygmomanometer based on gallium-based liquid alloy and blood pressure calibration method

Abstract

The invention provides a sphygmomanometer based on gallium-based liquid alloy and a blood pressure calibration method, relates to the technical field of medical equipment, and particularly relates to a sphygmomanometer using a gallium-based liquid alloy column as pressure sensing liquid for blood pressure testing to measure the blood pressure of a human body. A system for controlling the pressure of the sphygmomanometer by adjusting the length of a glass capillary tube and matching with a pressure control cavity is provided, so that the gallium-based liquid alloy column is accurately controlled, the gallium-based liquid alloy is prevented from being oxidized, the measurement precision is improved, and the length of the glass capillary tube is shortened. According to the sphygmomanometer and the blood pressure calibration method, dependence of society on harmful mercury metal can be greatly reduced, the problem that an electronic thermometer is poor in measurement precision is solved, and the sphygmomanometer and the blood pressure calibration method are expected to be widely applied and popularized.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a gallium-based liquid alloy-based sphygmomanometer and a blood pressure calibration method. Background technique [0002] A sphygmomanometer is an instrument for measuring blood pressure, also known as a sphygmomanometer. Sphygmomanometers mainly include auscultation sphygmomanometers and oscillometric sphygmomanometers. In 1835, Julius Elisson invented a sphygmomanometer, which transmits the pulsation of the pulse to a narrow column of mercury. When the pulse pulsates, the mercury will jump up and down accordingly. measure pulse and blood pressure. The main principle of the sphygmomanometer refers to the process of measuring the blood flow pressure during this period by compressing the local arteries by applying pressure to prevent the pulsation of the local arteries. Adjust the cuff gas to change the pressure, and listen to the sound of the pulse with a stethoscop...

AI Technical Summary

Problems solved by technology

However, in the application of sphygmomanometers, since the liquid metal is in contact with the air during use, once the gallium-based liquid alloy is used instead of mercury, the liquid alloy is easily oxidized, and the oxide adheres to the glass surface, resulting in device failure.

Moreover, since the density of gallium-based liquid alloys is lower than that of mercury, when using gallium-based liquid alloys to directly replace mercury as the sensing liquid for blood pressure measurement, blood pressure testing at standard atmospheric pressure will result in a significant increase in the length of the glass capillary used

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