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Abstract
Although previous studies have shown correlation between regional cerebral oxygen saturation (rScO2) and mixed venous oxygen saturation (SvO2), there is a lack of pragmatic information on the clinical applicability of these findings, such as tracking ability. We retrospectively analyzed continuous intraoperative recordings of rScO2 and SvO2 obtained from a pulmonary artery catheter and either of two near-infrared spectroscopy (NIRS) devices (INVOS 5100C, Medtronic; O3, Masimo) during off-pump cardiopulmonary bypass (OPCAB) surgery in adult patients. The ability of rScO2 to track SvO2 was quantitatively evaluated with 5 min interval changes transformed into relative values. The analysis included 176 h of data acquired from 48 subjects (26 and 22 subjects for INVOS and O3 dataset, respectively). The area under ROC of the left-rScO2 for detecting change of SvO2 ≥ 10% in INVOS and O3 datasets were 0.919 (95% CI 0.903–0.936) and 0.852 (95% CI 0.818–0.885). The concordance rates between the interval changes of left-rScO2 and SvO2 in INVOS and O3 datasets were 90.6% and 91.9% with 10% exclusion zone. rScO2 can serve as a noninvasive tool for detecting changes in SvO2 levels, a critical hemodynamic measurement.
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1 Chungnam National University Hospital, Department of Anesthesiology and Pain Medicine, Daejeon, Korea (GRID:grid.411665.1) (ISNI:0000 0004 0647 2279); Chungnam National University College of Medicine, Department of Anesthesiology and Pain Medicine, Daejeon, Korea (GRID:grid.254230.2) (ISNI:0000 0001 0722 6377)
2 Chungnam National University Hospital, Department of Thoracic and Cardiovascular Surgery, Daejeon, Korea (GRID:grid.411665.1) (ISNI:0000 0004 0647 2279)
3 Chungnam National University Hospital, Department of Anesthesiology and Pain Medicine, Daejeon, Korea (GRID:grid.411665.1) (ISNI:0000 0004 0647 2279)
4 Chungnam National University College of Medicine, Department of Biomedical Engineering, Daejeon, Korea (GRID:grid.254230.2) (ISNI:0000 0001 0722 6377)
5 Chungnam National University Hospital, Department of Anesthesiology and Pain Medicine, Daejeon, Korea (GRID:grid.411665.1) (ISNI:0000 0004 0647 2279); Chungnam National University College of Medicine, Department of Anesthesiology and Pain Medicine, Daejeon, Korea (GRID:grid.254230.2) (ISNI:0000 0001 0722 6377); Chungnam National University Hospital, Biomedical Research Institute, Daejeon, Korea (GRID:grid.411665.1) (ISNI:0000 0004 0647 2279)