Method for eliminating zero drift of electronic sphygmomanometer and device adopting the method

Abstract

The invention relates to a method for eliminating zero drift of an electronic sphygmomanometer and a device adopting the method. The method comprises the following steps: firstly controlling by using a valve before the electronic sphygmomanometer starts to measure every time, disconnecting a pressure sensor air passage and a sleeve strap air passage, communicating with atmosphere, taking an obtained pressure signal as a pressure signal corresponding to zero pressure and taking the pressure signal as a zero pressure reference value to conserve; disconnecting the sensor air passage and the atmosphere and communicating with the sleeve strap air passage to carry out blood pressure measurement; after blood pressure measurement data is obtained by the electronic sphygmomanometer, correcting a pressure signal value obtained by every measurement by means of the conserved zero pressure reference value and carrying out blood pressure calculation and display through taking the data after being calculated and corrected as measuring results. The invention not only can better eliminate the pressure reading error caused by the zero drift of the electronic sphygmomanometer in the blood pressure measurement process of the electronic sphygmomanometer and improve the human body blood pressure measurement accuracy, but also can be used for other technical fields for eliminating the zero drift by applying a pressure sensor.

Description

technical field [0001] The invention belongs to a calibration method of a medical instrument and a device adopting the method, in particular to a method for eliminating the zero drift of an electronic sphygmomanometer and an electronic sphygmomanometer adopting the method. Background technique [0002] The electronic sphygmomanometer system realizes the detection, amplification, conditioning and analysis of the cuff pressure through electronic components such as pressure sensors and operational amplifiers, and then obtains the blood pressure value of the subject. Among them, when the environmental conditions such as temperature and humidity change or with the prolongation of use time, the performance of the pressure sensor will change, which will eventually affect the accuracy of the sphygmomanometer measurement. Among them, the most obvious change in the performance of the pressure sensor is the zero point drift (that is, the pressure signal corresponding to zero pressure c...

AI Technical Summary

Problems solved by technology

Although the influence of various factors on the zero drift of the pressure sensor can be reduced by selecting a high-performance pressure sensor (with temperature compensation and other functions), so that the system can meet the design requirements of blood pressure measurement; but this will greatly increase the production cost of the electronic sphygmomanometer

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