Pressure vibration sphygmomanometer for measuring cuff characteristics
A cuff and pressure-vibration technology, applied in diagnostic recording/measurement, medical science, sensors, etc., can solve problems such as inaccurate blood pressure values
Active Publication Date: 2016-12-07
陈秀美
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[0009] The characteristics of the tourniquet include the material characteristics of the inner wall of the tourniquet and the characteristics of the arm muscles and tissues. Although the material characteristics of the inner wall of the tourniquet are fixed, the characteristics of the arm muscles and tissues of each person are different. Therefore, the characteristics of the tourniquet The gas deflation rate will be different according to the thickness of each person's arm and the characteristics of muscles and tissues. From this, it can be seen that during the deflation process of the cuff, the characteristics of the pressure vibration envelope in the cuff will definitely change with the person. The ratio of systolic blood pressure and diastolic blood pressure will be changed due to the influence of the characteristics of the cuff. The value must be inaccurate
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[0022] The elastic properties of arteries vary according to the transmitted pressure (P t ) varies with different, can be described by exponential function, V is in P t Arterial volume at time, V o is the arterial volume at zero transmission ground pressure, V max is the fully expanded volume of the artery, C max is the maximum elasticity of the artery, and the transmission pressure is the difference between the external and internal pressure of the artery, the relationship between the change of the arterial volume and the transmission pressure, such as figure 1 As shown, it can be seen that the blood pressure wave in the artery is the same (the graph on the Y axis), but the amplitude of the volume wave reflected by the artery will be different (the graph on the X axis) due to different transmission pressures.
[0023] The key of the piezo-vibration sphygmomanometer for measuring cuff characteristics provided by the present invention is to use a flowmeter and a pressure sen...
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The invention provides a pressure vibration type sphygmomanometer for measuring characteristics of a pulse-pressing belt. The sphygmomanometer comprises the pulse-pressing belt, an air-inflation motor, a flowmeter, an air-discharge magnetic valve, a pressure sensor and a microcontroller. The interior of the microcontroller is provided with a blood pressure calculating part, during the pressurizing process, the pressurizing flow value, of the pulse-pressing belt, measured by the flowmeter is converted into a volume value, the pressure sensor senses and records the value of pressure in the pulse-pressing belt, characteristics of the pulse-pressing belt are constructed, by means of the characteristics of the pulse-pressing belt, parameters used for adjusting the systolic pressure ratio and the diastolic pressure ratio are obtained, by means of calculation, the systolic pressure amplitude and the diastolic pressure amplitude are obtained, points in time when the systolic pressure amplitude and the diastolic pressure amplitude occur are found in an envelope curve, and the corresponding pressures are found in the pulse-pressing belt by means of the points in time, and the corresponding pressures are the arterial systolic pressure and the artery diastolic pressure.
Description
technical field [0001] The present invention is a pressure-vibration sphygmomanometer, especially a kind of construction cuff characteristics to adjust the ratio of systolic pressure and diastolic pressure, and according to the adjusted ratio of systolic blood pressure and diastolic pressure, find arterial systolic pressure and arterial relaxation A pressure-vibration sphygmomanometer that measures the pressure of the cuff. Background technique [0002] In 1733, British scientist Stephen Hales inserted a vertical brass tube open at both ends into the horse's artery, and then measured the average pressure by observing the height of blood crawling through the glass window on the copper tube. In 1828, Poiseuille replaced the inconvenience with a mercury column. The long copper tube can measure the mean arterial pressure of the horse through a mercury column of 20 cm, and this method of inserting into the body to measure blood pressure is called invasive blood pressure (Invasive...
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IPC IPC(8): A61B5/0225
CPCA61B5/0225A61B5/0295
Inventor 刘省宏王明义
Owner 陈秀美