Masimo O3 Regional Oximetry Device in Pediatric Patients Undergoing Cardiac Surgery

"After anesthesia induction, a masimo O3 sensors are attached to the forehead (ScO2) and the sole of the foot (StO2). About 0.4 ml blood samples are obtained from arterial line and central venous line at three epochs before and after cardiopulmonary bypass (total 6 times)~* T1: before cardiopulmonary bypass (CPB), fraction of inspired oxygen (FiO2) 0.2~* T2: before CPB, FiO2 0.5~* T3: before CPB, FiO2 0.8~* T4: after CPB, FiO2 0.8~* T5: after CPB, FiO2 0.5~* T6: after CPB, FiO2 0.2~Hemoglobin oxygen saturation values are confirmed in each sample (arterial sample: SaO2, venous sample: SvO2). Each O3 values (ScO2 and StO2) are compared to the values of SvO2, 0.7 × SvO2 + 0.3 × SaO2."