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Revista de Gastroenterología del Perú

Print version ISSN 1022-5129


CHACALTANA MENDOZA, Alfonso et al. Perception of pain during sigmoidoscopy flexible as an additional diagnostic method for irritable bowel syndrome. Rev. gastroenterol. Perú [online]. 2012, vol.32, n.2, pp.178-183. ISSN 1022-5129.

INTRODUCION: Visceral hypersensitivity has been proposed as a biological marker of Irritable bowel syndrome (IBS). OBJETIVE: To evaluate the pain perception during sigmoidoscopy using a visual analog scale of pain in patients with or without IBS, and to assess the pain perception as diagnostic criteria for IBS. We further assessed the sensitivity, specificity and diagnostic efficiency of pain scores to diagnose IBS. METHODS: A prospective case-control study in patients who underwent sigmoidoscopy for the evaluation of gastrointestinal symptoms. All patients completed Rome III criteria questionnaires and divided into two groups: IBS and non-IBS. All participants reported pain scores on visual analog scales after of study. Differences were evaluated. We calculated a receiver-operator characteristic curve (ROC), sensitivity, specificity and diagnostic efficiency. RESULTS: We analyzed 20 patients with IBS and 20 controls. The pain scores werehigher in IBS patients compared with non-IBS patients (median, 52.5 vs. 27.5, p = 0.006). The area under the curve was 0.84, at pain score level of ≥ 40 mm with a sensitivity, specificity and diagnostic efficiency of 85%, 75% and 80%, respectively. CONCLUSIONS: The degree of pain perception was higher in IBS patients than in non-IBS patients during sigmoidoscopy. A score of pain perception in ≥ 40 mm may predict the diagnosis of IBS with good sensitivity (85%) and specificity (75%).

Keywords : irritable bowel syndrome; visceral hypersensitivity; pain perception.

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