Predictive factors of bowel resection for midgut volvulus based on an analysis of bi-center experiences in southern Japan.

Purpose: Midgut volvulus is an urgent disease often occurring in neonates. This study clarified the clinical features of midgut volvulus and evaluated predictors to avoid bowel resection.

Methods: This bi-center retrospective study enrolled 48 patients who underwent surgery for intestinal malrotation between 2010 and 2022. Patients' background characteristics and preoperative imaging findings were reviewed.

Results: Midgut volvulus was recognized in 32 patients (66.7%), and 6 (12.5%) underwent bowel resection. Based on a receiver operating curve analysis of bowel resection, the cut-off value of the body weight at birth and at operation were 1984 g [area under the curve (AUC) 0.75, 95% confidence interval (CI) 0.52-0.99] and 2418 g (AUC 0.70, 95% CI 0.46-0.94), respectively. The cut-off value of intestinal torsion was 540° (AUC 0.76, 95% CI 0.57-0.95), and that of the time from the onset to the diagnosis was 12 h (AUC 0.85, 95% CI 0.72-0.98). For midgut volvulus with an intestinal torsion > 540°, the most sensitive preoperative imaging test was ultrasonography (75%) Patients with bloody stool tended to undergo bowel resection.

Conclusions: Patients with a low body weight and bloody stool should be confirmed to have whirlpool sign by ultrasonography and scheduled for surgery as soon as possible.