What is the primary diagnostic method for detecting esophageal varices?

Which of these tests is most sensitive for detecting Helicobacter pylori (H. pylori) infection in the stomach?

What is the gold standard diagnostic test for Barrett's esophagus?

Which imaging technique is LEAST useful for diagnosing upper GI bleeding?

A patient presents with dysphagia. Which diagnostic test is most appropriate as the initial investigation?

What is the primary purpose of performing a gastric emptying study?

Which of the following can be diagnosed using esophageal manometry?

A patient is suspected of having Zollinger-Ellison syndrome. Which diagnostic test is most important?

Which diagnostic procedure is used to visualize the entire small intestine, especially in cases of obscure GI bleeding?

What is the role of a pH monitoring study in diagnosing GERD?