The impact of seasonal changes on spinal anesthesia-related complications: A prospective observational longitudinal study

Aim: In this tudy, it was aimed to investigate the complications that may develop during and after the anesthesia in patients undergoing spinal anesthesia, and the seasonal relationships of the monitored parameters in this study.Material and Methods: A total of 190 patients with ASA I-II group, aged between 18-65 years, who were scheduled for lower extremity operation, were included in the study after obtaining the ethics committee approval and the consent of the patients.The patients were divided into four groups: Group Su, Group Au, Group Wi, and Group Sp.Patient heart rate, blood pressure, peripheral oxygen saturation values were recorded.A subarachnoid puncture was performed with a 25G Quincke spinal needle and the number of attempts required for successful puncture was recorded.For spinal anesthesia, standard dose of 3 ml (15 mg) of 0.5% levobupivacaine was administered to all groups.All patients were visited on 6-12-24-48-72nd postoperative hours and on the 7th postoperative day, and the discharged patients were asked about complications via telephone.Results: The number of atropine injections due to complications of intraoperative bradycardia was significantly higher in Group Su than in the other groups (p = 0.010).Although there was no statistical difference between groups in terms of headache complications (p = 0.394), it was quantitatively higher in Group Su.The low back pain incidence was significantly higher in Group Su (37.7%, p = 0.01).Discussion: In this study, we concluded that intraoperative and postoperative complications were more common in the summer period in patients who underwent spinal anesthesia.