Abstract: We describe an evaluation of photoplethysmography (PPG) signals with two wavelengths channels (infrared and red) using a wrist-worn sensor for the estimation of heart rate variability (HRV) ...
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2 Henan Province International Joint Laboratory of Pain, Cognition and Emotion, Zhengzhou, China Introduction During sedation for gastroscopy, hypoxaemia represents the most common adverse event. The ...
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