Cerebral and somatic oxygen saturation in pediatric cardiac patients with delayed sternal closure

Results rSO2b increased at 12 hours (p = 0.0039), and rSO2s did not change compared to data immediately after surgery. Deficit base decreased (p = 0.016) and standard bicarbonates increased (p = 0.016) on POD1, lactate decreased (p = 0.0001) and diuresis increased (p = 0.013) on POD2, heart rate decreased (p = 0.035) on POD3. There was no change in systemic arterial blood pressure, left atrial pressure (LAP) and central venous pressure (CVP), arteriovenous oxygen saturation difference (a-vO2 dif.), pH, paO2, and paCO2. Vasoactive inotropic score was lower on POD2 and 3 compared to the day of surgery (p = 0.041 and p = 0.048). DSC resulted in an increase in LAP, CVP, a-vO2 dif., and base deficit (p < 0.05). Increase in LAP lasted 24 hours, other changes were present during 18 hours. rSO2b and rSO2s were lower at 1 6 hour and during 24 hours, respectively (p < 0.05). There was no change in lactate levels. pH and standard bicarbonate were lower and vasoactive inotropic score was higher compared to preclosure values (p < 0.05). rSO2b and rSO2s values did not correlate with lactate and a-vO2 dif. values.