PROBLEM TO BE SOLVED: To measure the oxygen saturation in the blood of a living body without giving discomfort to the living body during sleeping, with a simple constitution.SOLUTION: A blood oxygen saturation measuring apparatus comprises: applying means which applies infrared light of first and second wavelengths different from each other； reflection means 21 which reflects infrared light applied by the applying means and having passed through a living body； light receiving means which receives infrared light reflected by the reflection means 21 and having passed through the living body； an intensity calculation part which calculates the intensity of infrared light received by the light receiving means； an absorbance variation calculation part which calculates the variation of absorbance by the living body； and a blood oxygen saturation calculation part which calculates the oxygen saturation in the blood of the living body.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2018,JPO&INPIT【課題】簡易な構成で、睡眠時の生体に違和感を与えることなく生体の血液中の酸素飽和度を測定する。【解決手段】血中酸素飽和度測定装置は、互いに異なる第１および第２の波長の赤外光を照射する照射手段と、照射手段によって照射され、生体を透過した赤外光を反射する反射手段２１と、反射手段２１によって反射され、生体を透過した赤外光を受光する受光手段と、受光手段によって受光された赤外光の受光強度を算出する強度算出部と、生体による吸光度の変化量を算出する吸光度変化量算出部と、生体の血液中の酸素飽和度を算出する血中酸素飽和度算出部とを備える。【選択図】図８
