[Design of a pulse oximeter used to low perfusion and low oxygen saturation]
Shuangping Tan1, Zhiguang Ai, Yuxing Yang
1School of Life Science & Technology, Huazhong University of Science & Technology, Wuhan 430074. tanshuangping@gmail.com
Abstract:
This paper presents a new pulse oximeter used to low perfusion at 0.125% and wide oxygen saturation range from 35% to 100%. In order to acquire the best PPG signals, the variable gain amplifier(VGA) is adopted in hardware. The self-developed auto-correlation modeling method is adopted in software and it can extract pulse wave from low perfusion signals and remove motion artifacts partly.
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