title: Use of endoscopic Congo red test in the evaluation of ulcer recurrence risks after proximal gastric vagotomy. A new interpretive method.
abstract: The endoscopic Congo red test (ECRT) was performed in 43 patients who underwent proximal gastric vagotomy (PGV) for duodenal ulcer (DU). The aim of the study was to develop a standard and reliable way to interpret the results obtained in this test. Thus, the results of ECRT were related to post-operative clinical evaluation and to pre- and post-operative basal and pentagastrin-stimulated gastric acidity. Whenever ECRT was considered positive, we called it in "large extension" if a red-to-black colour change occurred in three or more of the areas studied. Positive ECRT was observed in 39 patients (90.7%). There was a statistically significant (P less than 0.01) correlation between poor clinical results and positive ECRT in "large extension". We concluded that: (1) a positive ECRT result has no clinical or prognostic significance in DU patients after PGV; (2) ECRT, analysed according to the extension of the areas turning black, is a practical and reliable method to establish clinical results and prognosis in these patients.
authors.affiliation: Department of Gastroenterology, Hospital des Clínicas, University of São Paulo College of Medicine, Brazil.
authors.forename: M P
authors.initials: MP
authors.lastname: de Miranda
authors.forename: J
authors.initials: J
authors.lastname: Gama-Rodrigues
authors.forename: L A
authors.initials: LA
authors.lastname: D'Albuquerque
authors.forename: P
authors.initials: P
authors.lastname: Sakai
authors.forename: H W
authors.initials: HW
authors.lastname: Pinotti
mesh_terms: D000328:Adult; D003224:Congo Red; D004381:Duodenal Ulcer / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D005753:Gastric Mucosa; D005773:Gastroscopy; D006801:Humans; D008297:Male; D012008:Recurrence; D014629:Vagotomy, Proximal Gastric
chemical_list: D003224:Congo Red