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The first national survey of anesthesia techniques for fetal therapies in Japan.

Journal of Anesthesia 2019 December
PURPOSE: The aim of this study was to survey the frequency of various anesthetic techniques used in the anesthetic management of both the mother and fetus during fetal therapies in Japan.

METHODS: We sent a postal survey to the institutions with physicians who held membership of the Japan Society of Fetal Therapy to describe maternal and fetal anesthetic management during fetal therapies performed from January 2016 to March 2017. The therapies included were thoracoamniotic shunting (TAS), intrauterine transfusion (IUT), radiofrequency ablation (RFA), fetoscopic laser photocoagulation (FLP), fetoscopic endotracheal occlusion (FETO), and ex utero intrapartum treatment (EXIT). Survey respondents were asked to specify the standard anesthetic technique used in each of these procedures done during the study period.

RESULTS: The most common anesthetic techniques used in each therapy were sedation/analgesia with local anesthesia in TAS (31%), local anesthesia alone in IUT (47%), neuraxial anesthesia in RFA (50%), FLP (66%) and FETO (100%), and general endotracheal anesthesia in EXIT. Fetal analgesia was utilized in 61% of TAS, 33% of IUT, 10% of RFA, 22% of FLP, 100% of FETO, and 50% of EXIT. In all fetal therapies, the most common route of administration for fetal anesthesia was maternal administration.

CONCLUSION: In this first published description of the frequency of various anesthetic techniques used during fetal therapies in Japan, we found that anesthetic techniques varied depending on the degree of invasiveness to the mother and fetus. Fetal anesthesia was not always performed, and the most common route for fetal anesthesia was maternal administration.

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