Barium swallow tests are common in the diagnosis process for dysphagia. After the patient ingests the barium contrast, the practitioner takes an x-ray or video of the swallowing process. The medical provider can see how the muscles move and where the contrast goes when swallowed. Some people may require an endoscopy: the practitioner inserts a tube with a tiny camera through the nose or mouth to observe the swallowing process. A manometry test is similar, but the inserted tube measures the esophagus muscle and valve strength.

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