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Fast and Accurate Exhaled Breath Ammonia Measurement
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[13C-urea breath test].

C Kato1, T Yamaguchi, K Yusa

  • 1First Department of Internal Medicine, Iwate Medical University.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|February 24, 2001
PubMed
Summary

The 13C-urea breath test (13C-UBT) accurately detects H. pylori eradication, showing superior sensitivity and specificity compared to traditional methods. This non-invasive test identifies treatment failures earlier, aiding in timely patient management.

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Area of Science:

  • Gastroenterology
  • Infectious Diseases
  • Diagnostic Medicine

Background:

  • Helicobacter pylori infection is a common cause of peptic ulcers.
  • Effective eradication therapy is crucial for managing H. pylori-related conditions.
  • Accurate diagnostic methods are needed to confirm successful H. pylori eradication.

Purpose of the Study:

  • To evaluate the diagnostic capability of the 13C-urea breath test (13C-UBT) for H. pylori eradication.
  • To compare the sensitivity and specificity of 13C-UBT with culture and histology for determining eradication.
  • To assess the utility of 13C-UBT in identifying early treatment failures.

Main Methods:

  • A study involving 153 patients undergoing H. pylori eradication therapy.
  • 13C-UBT performed at 6-8 weeks and 6 months post-therapy.
  • Comparison of 13C-UBT results with culture and histology.

Main Results:

  • At 6-8 weeks, 13C-UBT showed 100% sensitivity and 95.1% specificity compared to culture and histology.
  • Seven cases were inconsistent between 13C-UBT and other methods initially.
  • At 6 months, 13C-UBT sensitivity and specificity were 100%, with 4 of the 7 inconsistent cases becoming positive by all methods.

Conclusions:

  • 13C-urea breath test (13C-UBT) demonstrates superior sensitivity and specificity for H. pylori eradication diagnosis.
  • 13C-UBT can identify eradication failures earlier than culture and histology.
  • Re-examination of inconsistent cases after 6 months is recommended for accurate assessment.