A patch-type wireless forehead pulse oximeter for SpO2 measurement

2017 IEEE Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2017-10-01 DOI:10.1109/BIOCAS.2017.8325557

A. Azhari, S. Yoshimoto, T. Nezu, Hirokazu Iida, Hiroki Ota, Yuki Noda, T. Araki, T. Uemura, T. Sekitani, Katsuyuki Morii

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引用次数: 12

Abstract

A patch-type wireless wearable pulse oximeter system has been developed to measure the heart beat rate and oxygen saturation of blood (SpO2) in reflective mode from a person's forehead. The system uses light sources of two wavelengths (red, 625 nm; infrared, 865 nm) in an optical sensor, separates photodetector signal and transimpedance amplifier output into infrared (IR) and red photoplethysmographic (PPG) signals, and then digitizes and transmits data wirelessly via a Bluetooth module to a remote PC in real time, where the SpO2 value is calculated. The optical sensor, mounted on a 7 cm × 2 cm flexible sheet, is interfaced with an 8.5 cm × 3.5 cm wireless SpO2 circuit board. The entire sensor and wireless SpO2 system, which weighs only 15 g, is readily wearable on the forehead, unlike conventional non-wearable wired forehead pulse oximeters. Using our system, the reduction of SpO2 value was observed from 100% to 89%, under an 80 s breathhold condition, which matched with the simultaneously measured SpO2 values obtained using commercial pulse oximeters.

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一种用于SpO2测量的贴片式无线额头脉搏血氧仪

开发了一种贴片式无线可穿戴脉搏血氧仪系统，可以从人的前额反射模式测量心率和血氧饱和度(SpO2)。该系统使用两种波长的光源(红色，625 nm;在光学传感器中，将光电探测器信号和透阻放大器输出分离为红外(IR)和红色光电体积脉搏图(PPG)信号，然后通过蓝牙模块将数据数字化并实时无线传输到远程PC机，计算出SpO2值。光学传感器安装在一块7厘米× 2厘米的柔性薄片上，与一块8.5厘米× 3.5厘米的无线SpO2电路板相连。整个传感器和无线SpO2系统的重量只有15克，与传统的不可穿戴式有线额头脉搏血氧仪不同，它可以很容易地佩戴在额头上。使用我们的系统，在80 s屏气条件下，观察到SpO2值从100%降低到89%，这与商用脉搏血氧仪同时测量的SpO2值相匹配。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)

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