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The 99mTc-labeled RBC scan. A diagnostic method for lower gastrointestinal bleeding
Diseases of the Colon and Rectum
|January 1, 1984
Summary
Technetium-99m labeled red blood cell (RBC) scans accurately locate lower gastrointestinal bleeding sites. This imaging technique aids in early evaluation and can reduce the need for arteriography.
Area of Science:
- Nuclear medicine
- Gastroenterology
- Diagnostic imaging
Background:
- Lower gastrointestinal bleeding (LGIB) diagnosis can be challenging.
- Accurate localization of bleeding is crucial for timely intervention.
Observation:
- 62 patients with LGIB underwent technetium-99m labeled in vivo scans.
- 37 scans were positive, correlating with active bleeding.
- Scanning accurately identified bleeding sources in patients with both fulminant and slower hemorrhage.
Findings:
- Scans correctly localized bleeding sites in most positive cases.
- Two scans were false positive, and two were false negative.
- Angiography was positive in only two patients.
Implications:
- Labeled RBC scanning is a valuable tool for early LGIB evaluation.
- This technique can obviate the need for arteriography in some patients.
- Improved diagnostic accuracy leads to more efficient patient management.