Comparison of the Effects of Desflurane and Sevoflurane on Cerebral Oxygen Saturation in Patients Undergoing Thyroidectomy: A Randomised Controlled Clinical Study

Özet

Objective: The commonly performed sitting position with head extended during thyroidectomy has been shown to cause adverse effects on cerebral regional oxygen saturation (CrSO2). Therefore, the present study aimed to investigate the effects of two well-known anaesthetic agents, desflurane and sevoflurane, on CrSO2 in patients undergoing thyroidectomy in the semi-sitting position by near-infra-red spectroscopy monitoring.Methods: The study included 60 patients aged 18-65 years, with an American Society of Anesthesiologists (ASA) physical status classificationscore I-III, who underwent elective thyroidectomy in the semi-sitting position. The patients were randomly divided into two groups, dependingon the anaesthetic agent administered: (1) sevoflurane group (Group S; n=30) and (2) desflurane group (Group D; n=30). After intubation, thepatients were placed in a 45-degree semi-sitting position. Vital signs and the CrSO2 levels in both hemispheres were recorded both pre-inductionand at the induction minute 1, post-intubation, post-positioning, every 5 minutes intraoperatively and in the case of sudden changes.Results: No significant difference was found between the groups in terms of age, height, body weight, the ASA score, operative time andleft- and right-hemisphere CrSO2 (p>0.05). Moreover, the two groups were statistically similar to each other with regard to peripheral capillaryoxygen saturation, heart rate, systolic and diastolic blood pressure, mean artery pressure and end-tidal CO2 (ETCO2) levels.Conclusion: Desflurane and sevoflurane had similar effects in the preservation of CrSO2 in patients undergoing thyroidectomy in the semi-sitting position.