Use of endoscopic Congo red test in the evaluation of ulcer recurrence risks after proximal gastric vagotomy |
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Authors: | Marcelo Perosa de Miranda Joaquim Gama-Rodrigues Luiz Augusto Carneiro D'Albuquerque Paulo Sakai Henrique Walter Pinotti |
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Affiliation: | (1) Division of Digestive Surgery, Department of Gastroenterology, Hospital des Clínicas, University of São Paulo College of Medicine, São Paulo, Brazil |
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Abstract: | Summary 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<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. |
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Keywords: | Proximal gastric vagotomy Duodenal ulcer Ulcer recurrence Gastric acid secretion Congo red |
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