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The Yield of Ileoscopy: Does Indication Matter?

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Summary

Terminal ileum (TI) intubation during colonoscopies is most useful for diagnosing inflammatory bowel disease (IBD) in patients with chronic abdominal pain and diarrhea. Routine ileoscopy may not be beneficial for constipation or positive fecal occult blood tests (FOBT).

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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Diagnostic Yield

Background:

  • Routine terminal ileum (TI) intubation during colonoscopy is often considered low-yield.
  • The diagnostic utility of TI intubation for specific indications requires further investigation.

Purpose of the Study:

  • To evaluate the real-world diagnostic yield of indication-based ileoscopy.
  • To determine the value of ileoscopy in specific clinical scenarios.

Main Methods:

  • Retrospective review of over 30,000 colonoscopy reports from 2011-2018.
  • Analysis of demographic data, colonoscopy indications, and terminal ileum findings in 1800 patients who underwent ileoscopy.
  • Calculation of diagnostic yield and odds ratios for TI findings based on indication.

Main Results:

  • Ileoscopy identified findings in the TI (ileitis or ulcers) in 216 of 1800 patients.
  • TI findings were more common in younger patients and yielded the most information when investigating chronic abdominal pain and diarrhea (14.4% yield).
  • Positive fecal occult blood test (FOBT) and constipation were negatively associated with TI findings.

Conclusions:

  • Ileoscopy demonstrates the highest utility in patients suspected of having inflammatory bowel disease (IBD).
  • Routine ileoscopy may not significantly contribute to the evaluation of constipation or positive FOBT.
  • Indication-based ileoscopy can be a valuable diagnostic tool in specific gastroenterological contexts.