Abstract
Background
Gastrointestinal decompression is generally applied to a non-strangulated acute small bowel obstruction (NSASBO). Although long tube (LT) placement and administration of Gastrografin through a nasogastric tube (NGT-G) have shown advantages over NGT alone in previous studies, no studies appear to have compared LT and NGT-G.
Methods
In this multicenter, randomized controlled trial, patients with NSASBO were randomly assigned to receive LT or NGT-G between July 2016 and November 2018 at 11 Japanese institutions. The primary endpoint was non-inferiority of NGT-G compared to LT for non-surgery rate, and the lower limit of the 95% confidence interval for the non-surgery rate (−15%) was set as the lower margin for inferiority of NGT-G compared to LT.
Results
In total, 223 patients (LT group, n = 111; NGT-G group, n = 112) were analyzed in the present trial. The non-surgery rate was 87.4% in the LT group and 91.1% in the NGT-G group, with a 3.7% difference between NGT-G and LT (95.3%CI − 5.55 to 12.91; non-inferiority P = 0.00002923). On the other hand, the non-surgery rate with pure NGT-G alone (76.8%) that represents non-cross-over NGT-G without subsequent LT was significantly lower than that with LT (P = 0.039). Median procedure time was significantly shorter with NGT-G (1 min) than with LT (25 min; P < 0.001), whereas no significant differences in mortality or hospital stay were noted between groups.
Conclusion
NGT-G is an effective alternative to LT as a first-line treatment for NSASBO. A sequential strategy comprising NGT-G followed by LT might offer a new standard for NSASBO.
Clinical trials registration
This trial was registered with the University Hospital Medical Information Network Clinical Trials Registry (umin.ac.jp/ctr Identifier: UMIN000022669) prior to the start of this trial.
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Acknowledgments
We are grateful to all physicians and institutions who participated in the present study. We also thank Yumi Yoshida (Division of Endoscopy, Nagoya City University Hospital) for creating a computer-aided randomization system, Takako Onodera (Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences) for data management of this clinical trial, and Dr. Satoshi Ohsaga (Clinical Research Management Center, Nagoya City University Hospital) for statistical design and analysis. This study was supported, in part, by multicenter collaborative clinical research funding from the Japanese Gastroenterological Association (to T. Shimura) that had no such involvement to this trial.
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Katano, T., Shimura, T., Nishie, H. et al. The first management using intubation of a nasogastric tube with Gastrografin enterography or long tube for non-strangulated acute small bowel obstruction: a multicenter, randomized controlled trial. J Gastroenterol 55, 858–867 (2020). https://doi.org/10.1007/s00535-020-01708-5
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DOI: https://doi.org/10.1007/s00535-020-01708-5