Accuracy and clinical utility of the mini-dose 14C-urea breath test in the evaluation of Helicobacter pylori infection

The aim of this study was to evaluate the accuracy of the C-14-urea breath test by comparing the results to those obtained by endoscopy with mucosal biopsy. We also examined the value of the breath test result obtained prior to endoscopy in predicting peptic ulcer disease. Forty-two individuals underwent the C-14- urea breath test. Collections of expired CO, were analysed using a liquid scintillation counter. All individuals then underwent endoscopy with biopsy. Biopsy material was evaluated by the rapid urease method and by histology for the presence of H. pylori. Our results demonstrated that the 14C-urea breath test was 100% sensitive and specific when compared to the rapid urease test as the 'gold standard' for the detection of H. pylori. In comparison to pathology, the sensitivity remained 100% and the specificity was 89%. The results of the C-14-urea breath test had a poor predictive value for the determination of peptic ulcer disease. We conclude that the C-14-urea breath test can be easily performed at any medical facility equipped with a liquid scintillation counter and can accurately detect H, pylori. A negative breath test result could not exclude the presence of peptic ulcer disease. ((C) 1998 Lippincott Williams & Wilkins).