Determining oxygen saturation in human blood by transmittance oxymetry is well developed as a monitoring technique , which is applied widely in clinical diagnosis or house health care . however , reflectance detecting is necessary in many circumstances , such as cerebral oxygen saturation , muscle oxygen saturation , or fetal oxygen saturation monitoring . how to get an exact and dependable reflectance oxygen saturation value by non - invasive and economic means is always concerned by researchers in biomedical engineering 采用透射式檢測方法確定人體血液中的氧飽和度已經是較為成熟的監(jiān)護手段,在臨床和家庭保健場合有廣泛的應用;但在很多需要進行反射檢測的場合,如腦血氧、肌血氧、胎兒血氧監(jiān)護等,如何用無創(chuàng)、經濟的方法獲得準確、可靠的血氧飽和度值仍是生物醫(yī)學工程領域不斷在探索的問題。