• Yun Kyung Jung, Cho Long Kim, Mi Ae Jeong, Jeong Min Sung, Kyeong Geun Lee, Na Yeon Kim, Leekyeong Kang, and Hyunyoung Lim.
• Department of Surgery, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Republic of Korea.
• BMC Anesthesiol. 2023 Sep 20; 23 (1): 321321.

BackgroundProper mask ventilation is important to prevent air inflow into the stomach during induction of general anesthesia, and it is difficult to send airflow only through the trachea without gastric inflation. Changes in gastric insufflation according to mask ventilation during anesthesia induction were compared.MethodsIn this prospective, randomized, single-blind study, 230 patients were analyzed to a facemask-ventilated group (Ventilation group) or no-ventilation group (Apnea group) during anesthesia induction. After loss of consciousness, pressure-controlled ventilation at an inspiratory pressure of 15 cmH2O was performed for two minutes with a two-handed mask-hold technique for Ventilation group. For Apnea group, only the facemask was fitted to the face for one minute with no ventilation. Next, endotracheal intubation was performed. The gastric cross-sectional area (CSA, cm2) was measured using ultrasound before and after induction. After pneumoperitoneum with carbon dioxide, gastric insufflation of the surgical view was graded by the surgeon for each group.ResultsIncrease of postinduction antral CSA on ultrasound were not significantly different between Ventilation group and Apnea group (0.04 ± 0.3 and 0.02 ± 0.28, p-value = 0.225). Additionally, there were no significant differences between the two groups in surgical grade according to surgeon's judgement.ConclusionsPressure-controlled ventilation at an inspiratory pressure of 15 cmH2O for two minutes did not increase gastric antral CSA and insufflation of stomach by laparoscopic view.Trial Registrationhttp://cris.nih.go.kr (KCT0003620) on 13/3/2019.© 2023. BioMed Central Ltd., part of Springer Nature.

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