Which diagnostic method is used for GI Bleed detection?

The Guaiac test, also known as the fecal occult blood test, is a diagnostic method specifically designed to detect hidden (occult) blood in the stool, which can indicate gastrointestinal bleeding. This test involves applying a chemical reagent to stool samples, and if blood is present, a color change will occur, indicating a positive result.

This method is particularly valuable for screening for bleeding that may not be visible to the eye, such as that which occurs in conditions like bleeding ulcers, colorectal cancer, or diverticulosis. It is a straightforward, non-invasive test that can be performed relatively easily, making it a common choice for initial assessment in cases of suspected GI bleeding.

While other diagnostic methods listed can also play a role in evaluating gastrointestinal bleeding, they serve different purposes. Endoscopy is more invasive and allows direct visualization of the GI tract to assess and potentially treat bleeding sources. CT abdomen/pelvis can provide information about the presence of bleeding and identify structural abnormalities but is not primarily used for initial screening. Ultrasound of the right upper quadrant is primarily used for examining gallbladder or liver pathologies and is not a first-line tool for evaluating GI bleeding.