• Ji-Hyun Lee, Seungeun Choi, Minkyoo Lee, Young-Eun Jang, Eun-Hee Kim, Jin-Tae Kim, and Hee-Soo Kim.
• Department of Anaesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, # 101 Daehakno, Jongnogu, Seoul, 03080, Republic of Korea.
• BMC Anesthesiol. 2020 Nov 18; 20 (1): 289.

BackgroundThe benefits of intraoperative magnesium supplementation have been reported. In this prospective, randomized study, the effects of magnesium supplementation during general anaesthesia on emergence delirium and postoperative pain in children were evaluated.MethodsA total of 66 children aged 2 to 5 years who underwent strabismus surgery were assigned to the magnesium or to the control group. Preoperative anxiety was assessed using the modified Yale Preoperative Anxiety Scale. After anaesthesia induction, the magnesium group received an initial loading dose of 30 mg/kg magnesium sulphate over 10 min and, then, continuous infusion of 10 mg/kg per h until 10 min before the end of the surgery. The control group received an equal volume of normal saline via the same regimen. The Paediatric Anaesthesia Emergence Delirium (PAED) score, pain score, and respiratory events were assessed at the postanaesthetic care unit.ResultsData obtained from 65 children were analyzed. The PAED and pain scores of the two groups did not differ significantly. There were 26 of 33 (78.8%) and 27 of 32 (84.4%) children with emergence delirium in the control and the magnesium groups, respectively (odds ratio 0.69, 95% CI 0.19-2.44; p = 0.561). The preoperative anxiety score was not significantly correlated with the PAED score. The incidence of respiratory events during the emergence period did not differ significantly between the two groups.ConclusionsMagnesium supplementation during anaesthesia had no significant effects on the incidence of emergence delirium or postoperative pain in children undergoing strabismus surgery.Trial RegistrationClinicalTrials.gov ( NCT03132701 ). Prospectively registered May 8, 2017.

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