System and method for measuring pulse blood oxygen

Abstract

The invention relates to a system and a method for measuring pulse blood oxygen. The system comprises N pulse blood oxygen sensors (11), an upper computer measurement module, a signal transmission line and a lower computer measurement module, wherein the lower computer measurement module comprises a microprocessor (15), an analog digital conversion module (14) which is electrically connected with the microprocessor, a light source driving module (17), a communication interface and shift switches (12), the shift switches are electrically connected with the N sensors, a photoelectricity amplifier module (13) and the light source driving module, one of the N sensors is selected to be communicated with the photoelectricity amplifier module (13) and the light source driving module under the control of the microprocessor, and an output end of the photoelectricity amplifier module is electrically connected with the analog digital conversion module. The method includes that by means of the lower computer measurement module, the N pulse blood oxygen sensors are driven and monitored in a time-sharing mode, N ways of measurement signals and characteristic parameter values are sent to the upper computer measurement module, and each way of the signals are processed, calculated, displayed, stored and the like.

Description

technical field [0001] The invention relates to medical electronics, in particular to a pulse oximetry system and a method thereof. Background technique [0002] Pulse oximetry is based on the infrared spectrum method of 660 and 940 nanometer wavelengths. In the prior art, a photoelectric sensor is used to connect to the end of the monitored human body (such as fingers, forehead, etc.), and is connected to the measuring device through a connecting line; The device is generally a computer including an auxiliary circuit. The auxiliary circuit does not contain a microprocessor, and is all controlled and calculated by the computer. The specific measurement is: in the measurement, use the photoelectric sensor (including 660, 940 nanometer light source and photodetector), optical drive and photoelectric amplifier circuit and other analog signal processing circuits, digital conversion and micro Digital circuits such as processors demodulate and restore the original pulse wave sign...

AI Technical Summary

Problems solved by technology

[0004] In the dual blood oxygen measurement system constructed above, two completely independent pulse oximeter modules and sensors are used to realize the system, which has no impact on the accuracy, and the constituted system is also feasible. The disadvantages are as follows: first, the cost is doubled , the second is to double the volume, and the third is to double the power consumption. The other two measurement module subsystems are not related in any way. , especially when the two measurement module subsystems differ greatly

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