2KYRIACOU P A,POWELL S,LANGFORD R M,et al.Investigation of oesophageal photoplethysmographic signal and blood oxygen saturation measurements in cardiotyoracis surgenry patients[J].Physiol Meas,2002,23(3):533-545.
3FOURNELL A,SCHWARTE L A,SCHEEREN Y W,et al.Clinical evaluation of reflectance spectrophotometry for the measurement of gastric microvascular oxygen saturation in patients undergoing cardiopulmonary bypass[J].J Cardiothorac Vasc Anesth,2002,16(5):576-581.
4CHAN G S H,MIDDLETON P M,lOVELL N H,et al.Extraction of photoplethysmographic waveform variability by lowpass filtering[C] ∥Engineering in Medicine and Biology 27th Annual Conference,2005.
5MEGLINSKY I V,MATCHER S J.Modelling the sampling volume for skin blood oxygenation measurements[J].Med Biol Eng Comput,2001,39(1):44-55.
4Miyasaka K. Do we real y know how pulse oximetry works[J].{H}JOURNAL OF ANESTHESIA,2003,(04):216-217.
5Takuo Aoyagi. Pulse oximetry:its invention,theory,and future[J].{H}JOURNAL OF ANESTHESIA,2003,(04):259-266.
6Iijima T,Aoyagi T,Iwao Y. Cardiac output and circulating blood volume analysis by pulse dye-densitometry[J].{H}Journal of Clinical Monitoring,1997,(02):81-89.
9Tavakoli M, Turicchia L, Sarpeshkar R. An ultra-low-power pulse oximeter implemented with an energy-efficient transimpedance amplifier[J]. IEEE Trans Biomed Circuit Syst, 2010, 4(1): 27-38.
10Ye S, Zhou F, Chen H, et al. Non-lnvasive Method and Experimental Study for Measurement of Oxygen Saturation Rate in Wide Range[C]. IEEE ICBBE, 2008: 733-736.