Comparison of oxygen saturation between the blood of superior vena cava and mixed venous in lung transplantation / 实用医学杂志

ABSTRACT

Objective To compare the oxygen saturation between the blood of superior vena cava and mixed venous in lung transplantation and provide reference for monitoring method in anesthesia. Methods 30 patients who received lung transplantation were placed central venous catheter into superior vena cava and flotation catheter into the pulmonary artery in turn. The blood samples were collected from the superior vena cava and pulmonary artery for blood gas analysis simultaneously at the time of just followed the catheter placement (T1), before the resection of the first bad lung (T2), after the reperfusion of the first donor lung (T3), before the resection of the second bad lung (T4), after the reperfusion of the second donor lung (T5), before the end of the operation (T6). The oxygen saturation were compared between the blood of the superior vena cava and mixed venous. Results From T1 to T6, Bland-Altman analysis showed that the mean of deviation between the SpO2 measured in blood of superior vena cava and mixed venous were 0.5, 3.4, 2.3, 0.5, 0.27,-2.9, respectively, and the incidence beyond the upper and lowed limits of consistency zone was 3.3%, 0%, 0%, 3.3%, 3.3%, 0%respectively. The incidence of SpO2 within the consistent limits was 96.7%, 100%, 100%, 96.7%, 96.7%, 100% respectively. Conclusions The SpO2 of superior vena cava may be approximately reference as SpO2 of mixed venous during lung transplantation.