Discussion
critically ill, lung injury, AKI, myocardial injury, acute kidney injury
CRITICALLY ILL, SURGICAL SITE INFECTION
In our study, there was no difference in hospital LOS after OPCAB between the 30% and 80% oxygen groups. However, compared to the 30% oxygen group, there was nearly a 40% reduction of the postoperative AKI incidence in the 80% oxygen group, with a lower level of serum NGAL. In addition, SvOPrevious studies on the effects of supplemental oxygen have been largely performed in critically ill patients [Although some cohort studies showed that increased oxygen exposure was associated with a higher risk of acute kidney injury after major surgery [In general, lung injury from a high FiOSince the World Health Organization recommended using 80% oxygen to reduce surgical site infection, the effect of perioperative FiOThere have been concerns about hyperoxia-related myocardial injury after noncardiac surgery (MINS) [We recognize several limitations of this study. First, intraoperative FiOIn conclusion, intraoperative administration of 80% oxygen or 30% oxygen did not affect hospital LOS after OPCAB. However, 80% oxygen during OPCAB may decrease the incidence of postoperative AKI and serum NGAL concentration. Furthermore, global oxygen supply and cerebral regional oxygen saturation were also superior in the 80% oxygen group to the 30% oxygen group. Although it failed to reduce hospital LOS, an intraoperative FiO