Urinary excretion of orally ingested gastrografin on CT

S. Apter, G. Gayer, M. Amitai, M. Hertz

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Renal excretion of orally ingested gastrografin has rarely been reported on computed tomography (CT). We studied the unenhanced scans of 82 patients with bowel disorders or perforation to assess the prevalence of urinary contrast material (CM) in various bowel diseases. We also assessed the clinical significance of this sign. In addition, we reviewed the unenhanced CT scans of 100 randomly selected patients without bowel diseases as a control group. Twenty-nine of the 58 patients with bowel diseases, six of nine with free perforation, and one of 15 with covered perforation had CM in the urinary tract. None of the 100 without bowel disease showed urinary CM. Statistical analysis was done by using the Fisher's exact test. The prevalence of urinary CM was highest in inflammatory bowel disease, radiation enteritis, and free perforation (p < 0.0001). This study shows that the CT finding of orally ingested gastrografin in the urinary tract differentiates patients with bowel disease from those without.

Original languageEnglish
Pages (from-to)297-300
Number of pages4
JournalAbdominal Imaging
Issue number3
StatePublished - 1998
Externally publishedYes


  • Bowel disease
  • CT
  • Gastrografin
  • Perforation
  • Renal excretion


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