CAJ | 학술논문

针对传统的脉搏血氧监测存在光电检测电路复杂、实时性差等缺点，本文提出了一种高效实时的监测方法。以光电容积脉搏波描记法（PPG）为基本原理，构建了以光频转换技术为核心的全数字硬件系统，采用零相移数字滤波和小波分析技术实现脉搏血氧信号的预处理，运用线性回归分析完成血氧饱和度的计算。采用Fluke的Index2血氧模拟仪产生的标准信号进行测试，在70％～100％范围，误差小于2％。结果表明，该方法切实有效，具有电路简单、数据利用率高等优点，可以实现血氧值的秒级更新。
침대전통적맥박혈양감측존재광전검측전로복잡、실시성차등결점，본문제출료일충고효실시적감측방법。이광전용적맥박파묘기법（PPG）위기본원리，구건료이광빈전환기술위핵심적전수자경건계통，채용령상이수자려파화소파분석기술실현맥박혈양신호적예처리，운용선성회귀분석완성혈양포화도적계산。채용Fluke적Index2혈양모의의산생적표준신호진행측시，재70％～100％범위，오차소우2％。결과표명，해방법절실유효，구유전로간단、수거이용솔고등우점，가이실현혈양치적초급경신。
To solve the problems of the circuit complexity and poor real-time performance existed in traditional pulseoximetry monitoring system,an efficient real-time method is proposed.Based on the photoplethysmograph (PPG),adigital hardware system is constructed with the light to frequency conversion technology.This system adopts zero phasedigital filter and wavelet analysis technology to realize pulse oximetry preprocessing,and employs linear regression al-gorithm to complete the pulse oxygen saturation (SpO2 )calculation.By using this method,the standard signals in therange of70% ~100% derived from Fluke Index 2 XL oxygen simulator have acquired error rate less than 2%.The re-sults indicate that,this efficient method has the advantages of low complexity of circuit and high utilization rate of da-ta,and can refresh the SpO2 value at the level of second.