PMC5813676_01
a Pulse oximetry plethysmogram with interference. b A black plastic shield to eliminate the interfering signal
40981_2017_76_Fig1_HTML.jpg
PMC5813676_01_40981_2017_76_Fig1_HTML.jpg
Fig1
The SpO2 value, which was maintained between 97 and 99% until the time, disappeared suddenly with abnormal pulse wave (Fig. 1a). To eliminate the interference from the IR light, the pulse oximetry probe was covered with a black plastic shield (Fig. 1b) and the interference was completely eliminated. 