title: The 13C-urea breath test--detection of Helicobacter pylori infection in patients with partial gastrectomy.
abstract: The 13C-urea breath test (13C-UBT) for diagnosis of Helicobacter pylori (Hp) infection was evaluated in 41 patients after partial gastrectomy and was used for determination of the Hp-prevalence after two different procedures of reconstruction of the gastrointestinal tract, i.e. Billroth's II operation and Roux-en-Y anastomosis. Breath samples were taken at various time points within 30 minutes after a motility inhibiting liquid test meal with citric acid followed by 75 mg of 13C-urea. The 13CO2/12CO2-ratio (delta-value) was measured using isotope ratio mass spectrometry and the recovery of tracer in the exhaled breath was calculated (UBT-value). In all patients and in the corresponding control groups comparison of established reference methods (culture, CLO test, and Fuchsin staining) with the 4 point breath analysis for detection of Hp was investigated. In patients with partial gastrectomy, the sensitivity of the 13C-UBT to detect the presence of Hp and the negative predictive values were 100%, whereas the specificity and the positive predictive values were about 80%. In patients without gastric surgery quality control parameters were not significantly different. Hp-prevalence in postoperative patients was about 45%. All results were independent of their expression either as delta-value or as UBT-value and were not significantly different between the patients with Billroth's II operation and the patients with Roux-en-Y anastomosis. In conclusion, the 13C-UBT is a suitable method for diagnosis and therapeutic monitoring of Hp-status in patients after partial gastrectomy.
authors: Department of Clinical Pharmacology, University of Göttingen.
authors: E
authors: E
authors: Lotterer
authors: F E
authors: FE
authors: Lüdtke
authors: R
authors: R
authors: Tegeler
authors: G
authors: G
authors: Lepsien
authors: F E
authors: FE
authors: Bauer
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000714:Anastomosis, Surgical; D001944:Breath Tests; D002250:Carbon Radioisotopes; D004381:Duodenal Ulcer / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D005743:Gastrectomy; D005756:Gastritis / Q000175:diagnosis*; D016481:Helicobacter Infections / Q000175:diagnosis*; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis*; D011237:Predictive Value of Tests; D013274:Stomach Neoplasms / Q000601:surgery*; D014508:Urea
chemical_list: D002250:Carbon Radioisotopes; D014508:Urea