• Kai Wang, Junyu Tao, Zhangrui Hu, Zixuan Guo, Jing Li, and Wenjun Guo.
• Department of Anaesthesiology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui Province, China.
• J Coll Physicians Surg Pak. 2023 Mar 1; 33 (3): 249253249-253.

ObjectiveTo explore the predictive value of gastric antral cross-sectional area (CSA) in the occurrence of postoperative nausea and vomiting (PONV) by analysing the association between gastric antral CSA measured by ultrasound and frequency of PONV after laparoscopic cholecystectomy.Study DesignObservational study. Place and Duration of the Study: Department of Anaesthesiology, The First Hospital of Wannan Medical College, Yijishan Hospital of Wannan Medical College, from October 2021 to February 2022.MethodologyGastric antral ultrasound (US) was performed in 266 patients undergoing laparoscopic cholecystectomy (LC) before anaesthesia induction, after it, and after surgery. The data obtained were used to evaluate the relationship between gastric antral CSA and PONV.ResultsThe gastric antral CSA in Semi-recumbent decubitus (SRD) position >398.85 mm2 (AUC=0.623) highly indicated the occurrence of PONV. In addition, the subject performance characteristic curve of a binary logistics retrospective model for predicting PONV (AUC=0.805) highly indicated the occurrence of PONV.ConclusionGastric US assessment of gastric antral CSA might change the current assessment model of PONV risk. This study showed that the gastric antral CSA in the SRD position after anaesthesia induction and a binary logistics retrospective model could be used to predict the occurrence of PONV, which could be helpful to adjust intraoperative and postoperative interventions and accelerate the recovery of patients.Key WordsPostoperative nausea and vomiting, Gastric ultrasound, Gastric cross-sectional area, Perioperative period.

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