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Area of Science:

  • Gastroenterology
  • Radiology
  • Surgical Oncology

Background:

  • Lower gastrointestinal bleeding (LGIB) diagnosis traditionally relies on lower endoscopy (LE).
  • Computed tomographic angiography (CTA) provides a non-invasive, whole-gastrointestinal-tract visualization for immediate diagnosis.
  • This study compares the diagnostic value and bleeding control efficacy of LE and CTA in LGIB patients.

Purpose of the Study:

  • To compare the diagnostic accuracy of LE and CTA as initial diagnostic modalities for LGIB.
  • To evaluate the effectiveness of LE and CTA in achieving bleeding control.
  • To assess the utility of CTA in identifying active bleeding and predicting treatment needs.

Main Methods:

  • Retrospective analysis of 183 consecutive LGIB patients admitted between 2006 and 2012.
  • Comparison of patients undergoing LE versus CTA as their first diagnostic examination.
  • Emphasis on diagnostic accuracy, time to diagnosis, and bleeding control outcomes.

Main Results:

  • CTA diagnosis was achieved significantly faster than LE (median 3 hours vs. 22 hours).
  • Active bleeding was identified more frequently with CTA (31%) compared to LE (15%).
  • 80% of patients with active bleeding detected by CTA required surgery, while endoscopic therapy was effective for post-interventional bleeding.

Conclusions:

  • LE effectively manages post-interventional LGIB.
  • CTA is an efficient and more accessible alternative to colonoscopy for other LGIB causes.
  • CTA aids in localizing bleeding sources in active LGIB cases, predicting the necessity for surgical intervention.