Abstract
Intra-abdominal infectious complications (IAICs) following minimally invasive gastrectomy (MIG) for cancer sometimes worsen short- and long-term outcomes. In this study, we focused on the minimum umbilicus-vertebra diameter (MUVD) in preoperative computed tomography (CT) images and robotic surgery to prevent severe IAIC occurrence. A total of 400 patients with gastric cancer who underwent 204 laparoscopic gastrectomy (LG) and 196 robotic gastrectomy (RG) procedures were enrolled in this study. We retrospectively investigated the significance of the MUVD and robotic surgery for preventing severe IAICs following MIG using multivariate and propensity score matching analysis. The MUVD cutoff value was 84 mm by receiver operating characteristic (ROC) curve using severe IAICs as the end point. The MUVD and visceral fat area (VFA) had significantly higher area under the curve (AUC) than BMI (MUVD vs. BMI, p = 0.032; VFA vs. BMI, p < 0.01). In the multivariate analysis, high MUVD (HR, 9.46; p = 0.026) and laparoscopic surgery (HR, 3.35; p = 0.042) were independent risk factors for severe IAIC occurrence. In the propensity matching analysis between robotic and laparoscopic surgery in the high MUVD group, the RG group tended to have a lower severe IAIC rate than the LG group (0% vs. 9.8%, p = 0.056). The MUVD was a novel and easy-measuring predictor of severe IAICs following MIG. Robotic surgery should be considered first in patients with gastric cancer having an MUVD value of 84 mm or higher from the perspective of severe IAIC occurrence.
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