• Soomin Lee, Woosuk Chung, Haram Park, Hanwool Park, Seunghwan Yoon, Sangil Park, Jiho Park, Jun Young Heo, Xianshu Ju, Seok-Hwa Yoon, Yoon Hee Kim, and Youngkwon Ko.
• Department of Anesthesiology and Pain Medicine, Chungnam National University, Daejeon, South Korea.
• Paediatr Anaesth. 2017 Jul 1; 27 (7): 742-751.

BackgroundThe second trimester is a period of neurogenesis and neuronal migration, which can be affected by exposure to anesthetics. Studies also suggest that multiple exposures may have a greater impact on neurodevelopment.AimWe investigated whether in utero single or multiple exposures to anesthetics caused long-term behavior changes.MethodsPregnant mice were randomly divided into four groups on gestational day 14 (GD 14). Mice in the Control × 1 group were exposed to 100% oxygen for 150 min. Mice in the Sevo × 1 group were also exposed to 100% oxygen for 150 min, except that 2.5% sevoflurane was added during the first 120 min. Mice in the Control × 3 and Sevo × 3 group were identically treated as Control × 1 and Sevo × 1 group for three consecutive days, respectively (GD 14-16). Behavioral tests were performed only with the male offspring at the age of 2-4 months. Synaptic plasticity was also compared by inducing long-term potentiation in acute hippocampal slices.ResultsSingle or multiple sevoflurane exposures in pregnant mice during the second trimester did not cause long-lasting behavioral consequences or changes in long-term synaptic plasticity of their offspring.ConclusionOur study suggests that neither single nor multiple exposures of mice to sevoflurane during the fetal developmental period induces long-term behavioral dysfunctions or affects long-term synaptic plasticity. Additional studies focusing on early stages of neurodevelopment are necessary to confirm the effects of sevoflurane exposure during pregnancy.© 2017 John Wiley & Sons Ltd.

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