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

A liquid alloy, sphygmomanometer technology, used in vascular evaluation, cardiac catheterization, etc., can solve the problems of oxides adhering to the glass surface, device failure, easy oxidation of liquid alloys, etc., to achieve intuitive testing principles, reduce dependence, and solve measurement problems. Inaccurate effects

Active Publication Date: 2022-03-29
SHANGHAI JIAOTONG UNIV
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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.

Method used

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

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Embodiment

[0053] Gallium-indium-tin ternary alloy is used as the pressure-sensing liquid, and the weight ratio of gallium, indium, and tin is 70:20:10; the first inert gas and the second inert gas filled in the pressure maintenance chamber 4 and the pressure control chamber 5 respectively are selected Argon gas; the diameter D1 of the glass capillary 2 is set to 2 mm, the height H1 is 600 mm, the diameter D2 of the armband 2 is 180 mm, and the capacity volume of the pressure chamber 4 is 0.2 L;

[0054] After the arm goes deep into the armband, it is placed in the standard position for controllable pressurization; the inert gas is pressed into the closed space formed by the armband 2, the vent pipe and the liquid metal chamber 1, and the gallium-based liquid alloy 6 is pressed to make the gallium in the glass capillary 3 The base liquid alloy column rises to 350mm, and at the same time the arm is squeezed by the pressure pack inside the arm ring 2, the pressure is consistent and synchron...

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Abstract

The invention provides a gallium-based liquid alloy-based sphygmomanometer and a blood pressure calibration method, relating to the technical field of medical equipment, specifically using a gallium-based liquid alloy column as a pressure-sensitive liquid for blood pressure testing to measure blood pressure of a human body; proposed and constructed An inert gas double-chamber pressure control system realizes precise control of the pressure of the chamber, and improves the measurement accuracy while avoiding the oxidation of the gallium-based liquid alloy; The dependence on metal can solve the problems of poor measurement accuracy of electronic thermometers, and it 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/022
CPCA61B5/022
Inventor 金明江金学军
Owner SHANGHAI JIAOTONG UNIV
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