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No visible oral contrast. (a) No visible contrast on initial AXR. Decompressed stomach with nasogastric tube (arrow) in place. (b) Follow-up CT at 24 h confirms continued SBO and no visible oral contrast. Administered contrast was probably removed by early gastric tube decompression. The authors recommend allowing at least 2 h of NG tube clamping after contrast administration prior to restarting decompression. AXR, abdominal radiographs; NG, nasogastric; SBO, small bowel obstruction.
