北京生物醫(yī)學(xué)工程

無創(chuàng)光電容積脈搏波檢測(cè)分析系統(tǒng)

Non-Invasive photoplethysmography detection and analysis system

作者：聶冬崔萌朱貽盛牛金海

單位：上海交通大學(xué)(上海 200240)

關(guān)鍵詞：無創(chuàng)檢測(cè)；脈搏容積波；血氧飽和度；動(dòng)脈硬化；MSP430

分類號(hào)：

出版年·卷·期（頁碼）：2012·31·1（77-80）

摘要：

目的光電容積脈搏波（photoplethysmography，PPG）信號(hào)是目前心血管生理病理研究的應(yīng)用熱點(diǎn)之一。針對(duì)準(zhǔn)確、快速的應(yīng)用需求，本文設(shè)計(jì)一種無創(chuàng)PPG檢測(cè)分析系統(tǒng)。方法該系統(tǒng)分為前端采集裝置和信號(hào)處理兩部分，其中前端裝置以MSP430為核心，完成指端PPG信號(hào)的采集、處理與傳輸；計(jì)算機(jī)（personal computer，PC）則根據(jù)指端PPG信號(hào)分析受試者血管彈性信息。在檢測(cè)過程中，采集前端實(shí)時(shí)獲取心率（heart rate，HR）和血氧飽和度（blood oxygen saturation，SaO2）信息，PC計(jì)算的參數(shù)有血管硬化系數(shù)（stiffness index，SI）和血管反射系數(shù)(reflect index，RI)。結(jié)果通過年輕組和年長(zhǎng)組的對(duì)比實(shí)驗(yàn)證明，系統(tǒng)能快速準(zhǔn)確采集指端PPG形態(tài)特征，能準(zhǔn)確描述SI和RI參數(shù)變化，其對(duì)動(dòng)脈彈性的評(píng)估具有一定參考價(jià)值。結(jié)論該系統(tǒng)是適用于PPG信號(hào)采集與分析的實(shí)驗(yàn)裝置。

Objective Photoplethysmography（PPG）is a hot topic in the study of cardiovascular diseases now. For a quick and precise detection，we presented a non-invasive PPG detection and analysis system. Methods In the system was consisted of two parts，MCU and process units. The MCU cored with a MSP430 was utilized to detect the finger’s PPG first，then the signals were transmitted to a personal computer(PC)through RS232 serial or radio frequency(RF)chips. At last，the PC was used to analyze the signal to arterial information. During the process，MCU analyzed the heart rate(HR)，blood oxygen saturation(SaO2)in real time. PC assessed arterial stiffness index(SI)，reflect index(RI). Results To test the hardware and arterial algorithm，we acquired and analyzed 20 female subjects’ PPG signals by the system. Experiment showed that the system recorded the contour information quickly and precisely，and described the the parameters SI and RI for arterial characteristic change. Conclusions It is a useful system for the collection and analysis of PPG signals.

參考文獻(xiàn)：

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