title: What is the best method to diagnose Helicobacter infection in bleeding peptic ulcers?: a prospective trial.
abstract: BACKGROUND
  It has been debated which diagnostic test should be preferred for the diagnosis of Helicobacter pylori (HP) in patients with peptic ulcer diseases. Several limitations are reported in bleeding peptic ulcers because of intragastric blood and possibility of changed numbers of organisms by medication. This study was designed to find out the best method for diagnosis of HP infection, in aspect of deciding the times of detection and the specific tests in bleeding peptic ulcers.
  
  
  METHODS
  We prospectively examined histology, rapid urease test (CLO test), urea breath test (13C-UBT) and serology in HP diagnostics in 32 patients with bleeding peptic ulcers to detect HP infection. Each test was performed two times (four methods at first 24 hours and former three methods at 7th day after initial therapeutic endoscopy). We evaluated the sensitivity of each test, compared the two-times results and evaluated the effect of these tests to an outcome of endoscopic hemostasis.
  
  
  RESULTS
  Diagnostic sensitivities of histology, CLO test, 13C-UBT and serology are 75%, 67.8%, 100% and 100% at first endoscopy, and 71.4%, 78.5%, 89.3% at 7th day endoscopy, respectively. Histologic study and CLO test had diagnostic limitation at emergent first endoscopy contrary to UBT (p < 0.01). Histologic study, CLO test and UBT have limitations at 7th day endoscopy. Only 3 patients (9.4%) rebled with subsequent complete endoscopic hemostasis and all diagnostic tests at initial endoscopy did not influence the outcome of hemostasis.
  
  
  CONCLUSIONS
  First day histologic and CLO tests are inadequate methods in detecting HP infection in patients with bleeding peptic ulcers. 7-day histologic, CLO test and UBT have a low sensitivity. First-day UBT can be a standard test to diagnose HP infection in patients with bleeding peptic ulcers.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University Chonan Hospital, Institute of Digestive Disease Research, Korea
authors.forename: I K
authors.initials: IK
authors.lastname: Chung
authors.forename: S J
authors.initials: SJ
authors.lastname: Hong
authors.forename: E J
authors.initials: EJ
authors.lastname: Kim
authors.forename: J Y
authors.initials: JY
authors.lastname: Cho
authors.forename: H S
authors.initials: HS
authors.lastname: Kim
authors.forename: S H
authors.initials: SH
authors.lastname: Park
authors.forename: M H
authors.initials: MH
authors.lastname: Lee
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.forename: C S
authors.initials: CS
authors.lastname: Shim
mesh_terms: D001707:Biopsy, Needle; D001944:Breath Tests; D016009:Chi-Square Distribution; D005260:Female; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000150:complications / Q000175:diagnosis*; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D007723:Korea; D008297:Male; D010438:Peptic Ulcer Hemorrhage / Q000150:complications / Q000175:diagnosis*; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D012698:Serologic Tests; D013276:Stomach Ulcer / Q000150:complications / Q000175:diagnosis*; D014508:Urea / Q000032:analysis* / Q000378:metabolism
chemical_list: D014508:Urea