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Abstract
Objective: To investigate regional cerebral oxygen saturation values and determine the correlation between regional cerebral oxygen saturation and cardiac output, cardiac index in valve surgical patients.
Subjects and methods: A total of 51 valve surgical patients were enrolled in the study. Regional cerebral oxygen saturation and cardiac output (CO), cardiac index (CI) were measured during the phases of pre-induction, post-induction, onset of cardiopulmonary bypass (CPB), during CPB, the end of the CPB and before leaving theatre.
Results: Regional cerebral oxygen saturation when patients breath room air was 63.5 ± 7.7% in right brain and 62.9 ± 6.8% in left one, and in the range from 56.7 ± 10.5% to 65.2 ± 10.5% during studying points. This values was lowest during CPB, 56.7 ± 10.5% and 57.3 ± 9.8% in in right brain and in left one, respectively. Regional cerebral oxygen saturation correlated positively with CO, CI during studying pointsexcept for CPB time.
Conclusion: Baseline regional cerebral oxygen saturation was 63.5 ± 7.7% in right brain and 62.9 ± 6.8% in left one. The lowest values were during CPB. Regional cerebral oxygen saturationcorrelated well with CO, Cl except for CPB time.
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