Email this article Effects on cardiopulmonary bypass duration and optic nerve sheath diameter changes
DOI: https://doi.org/10.20528/cjpm.2025.02.002
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Background: Cardiopulmonary bypass (CPB) causes disruption of the blood-brain barrier and cerebral autoregulation for many reasons. The resulting cerebral edema causes an increase in intracranial pressure. Ultrasonographic optic nevre sheath diameter (ONSD) measurement is one of the non-invasive methods that provides information about intracranial pressure. Numerous studies have demonstrated a correlation between ONSD and intracranial pressure (ICP). We aimed to investigate ONSD changes during CPB and the relationship between these changes and CPB duration.
Methods: Twenty six patients aged between 18-75 years, with an ASA score of II or III, which underwent cardiac surgery with CPB are included to the study. ONSD measurements were made throughout surgery and data were recorded.
Results: ONSD values increased significantly at 45 and 90 min of CPB and end of the surgery compared to pre-CPB values for both eyes. There was no significant difference between 45 and 90 min. during CPB. A critical ONSD value was detected in 12 patients during CPB. No patient developed neurologic adverse events in the postoperative period.
Conclusion: ONSD increased during CPB regardless of duration. With the data obtained from our study, we cannot say that the increase in ONSD will be a predictor of postoperative neurological complications.
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References
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