Association between intraoperative rSO₂ decline and length of postoperative stay in ICU

Abstract

　Aim of the Study: To investigate the association between intraoperative cerebral oxygen saturation (rSO₂) decline and length of postoperative intensive care unit (ICU) stay following cardiovascular surgery.

　Method: Patients were separated into long group (L group; ICU stay >14 days) and short group (S group; ICU stay ≤14 days). The intensity of rSO₂ decline was calculated from rSO₂ values for each minute and then combined. We measured both absolute values and relative values from baseline.

　Result: Of 259 cases (S group: 233, L group: 26), the intensity of rSO₂ decline was lower in the S group when absolute value measurements were examined; However, there was no difference in decline intensity using relative values.

　Conclusion: The lengths of postoperative ICU stay were moderately associated with intraoperative rSO₂ reduction.