A sphygmomanometer and blood pressure calibration method based on gallium-based liquid alloy

Abstract

The invention provides a gallium-based liquid alloy-based sphygmomanometer and a blood pressure calibration method, which relate to the technical field of medical equipment, and specifically use a gallium-based liquid alloy column as a pressure-sensitive liquid for blood pressure testing to measure the blood pressure of a human body; The capillary length cooperates with the pressure control chamber to control the pressure of the sphygmomanometer, realizes the precise control of the gallium-based liquid alloy column, improves the measurement accuracy and shortens the length of the glass capillary while preventing the gallium-based liquid alloy from being oxidized; the sphygmomanometer and the The proposal of the blood pressure calibration method can greatly reduce the society's dependence on harmful mercury metals, solve the problems of poor measurement accuracy of electronic thermometers, and is expected to be greatly popularized and applied.

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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