What is a common diagnostic indicator of a gastrointestinal (GI) bleed?

• A. Elevated liver enzymes
• B. Positive heme test in stool
• C. Abdominal pain
• D. X-ray findings

Answer: (B)

A positive heme test in stool, also known as a fecal occult blood test, is a well-established diagnostic indicator of a gastrointestinal bleed. This test detects the presence of hemoglobin, indicating that bleeding has occurred somewhere in the gastrointestinal tract. A positive result suggests the need for further evaluation to localize the source of the bleed, which could be due to conditions such as peptic ulcers, diverticulosis, or malignancies.

While elevated liver enzymes can indicate liver pathology and abdominal pain can also be associated with a variety of GI conditions, neither specifically points to a GI bleed. X-ray findings may help visualize certain abnormalities in the gastrointestinal tract, but they are not as direct or definitive a test for bleeding compared to the heme test in stool, which specifically targets the presence of blood. Thus, the positive heme test in stool remains the most relevant indicator when assessing for a gastrointestinal bleed.