PROBLEM TO BE SOLVED: To provide an oxygen saturation degree measuring apparatus capable of accurately measuring an oxygen saturation degree of an organ in a low-invasive manner.SOLUTION: An oxygen saturation degree measuring apparatus 1 includes: a first contact unit 11 inserted into an abdominal cavity, which includes a light emitting part that comes in contact with an organ； a second contact unit 12 inserted into the abdominal cavity, which includes a light receiving part that comes in contact with the organ； and a control unit 20 having a control part for calculation an oxygen saturation degree (rSO2) by near infrared spectroscopy (NIRS) on the basis of a near infrared ray received by the light receiving part.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】低侵襲性で、精度よく臓器の酸素飽和度を測定することができる酸素飽和度測定装置を提供する。【解決手段】酸素飽和度測定装置１は、腹腔内に挿入され、臓器に接触する発光部を有する第１接触部１１と、腹腔内に挿入され、臓器に接触する受光部を有する第２接触部１２と、受光部で受光した近赤外線に基づいて、近赤外分光法（ＮＩＲＳ）によって酸素飽和度（ｒＳＯ２）を算出する制御部を有する制御ユニット２０と、を備える。【選択図】図１
