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Diagnostic Tests in Irritable Bowel Syndrome Patients

The diagnosis of IBS is made through a careful history and physical examination as well as the performance of a limited medical evaluation with a variety of tests. In the absence of a definitive test, formal symptom-based criteria have been developed for the diagnosis of IBS. When are diagnostic tests indicated? A review of diagnostic evaluation of patients with suspected IBS including structural tests (like x-ray or colonoscopy), blood tests, stool analysis, and breath tests.

Topics: Fact Sheet, Irritable Bowel Syndrome (IBS), Tests, lower GI tract

About the Authors

  • Brooks D. Cash, MD, FACP, CDR, MC, USN

    Chief, Gastroenterology Division and Colon Health Initiative; Associate Professor of Medicine, National Naval Medical Center, Bethesda, MD

  • William D. Chey, MD

    Professor of Medicine; Director, Gastrointestinal Physiology Laboratory; Director, Office of Clinical Research, Division of Gastroenterology, University of Michigan School of Medicine, Ann Arbor, MI

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