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Introduction: Transomental hernia (TOH), a type of intra-abdominal hernia formed as a result of incarceration through abdominal greater omental hiatus, is a rare disease that lacks specific physical features, which makes its preoperative diagnosis difficult. This study aims the clinical characteristics and radiological findings of 15 cases of TOH. Methods: From 2009 to 2021, we encountered 15 cases of TOH in which multi-detector row computed tomography (MD-CT) with multiplanar reconstruction (MPR) was helpful for the preoperative diagnosis. We performed a clinical study of patients with TOH. Results: The average age of the 15 patients (male, n=9; female, n=6) was 73 years (range, 58-91 years). The preoperative diagnosis, based on MD-CT, was TOH in 11 patients and internal hernia in 4 patients. The preoperative diagnosis of TOH was confirmed in 11 of 15 patients (73%). MD-CT showed dilatation of the small intestine on the ventral side of the ascending colon and the descending colon through the omental hiatus, closed loop, and the convergence of the mesentery or small intestine. Conclusion: The possibility of TOH should be considered when treating patients with obstruction who have no history of laparotomy. MD-CT with MPR is useful for the preoperative diagnosis of TOH.

Aims There have been some reports about the efficacy of trauma team activation. In November 2015, we implemented a trauma call system, wherein a general surgeon, neurosurgeon, and orthopedic surgeon are called to the emergency department when severe trauma patients are transferred to our emergency department. In this study, we evaluated the efficacy of this trauma call system. Methods The purpose of the present study was to evaluate the efficacy of a trauma call system for trauma cases with an Injury Severity Score ≥16. We compared the mortality of trauma cases and the time from arrival to the start of the examination and intervention before and after implementing this trauma call system. Results There was no significant difference in the mortality rates before and after the implementation of the trauma call system. The median time from arrival to the start of contrast‐enhanced computed tomography or transcatheter arterial embolization improved from 54 to 19 min (P = 0.015) and 171 to 84 min (P = 0.030), respectively, after the implementation of the trauma call system. Conclusion Our trauma call system did not significantly improve the mortality of trauma patients with an Injury Severity Score ≥16. However, it was effective for reducing the time from the arrival to the start of contrast‐enhanced computed tomography or transcatheter arterial embolization.