The Assay Test for fecal blood, commonly known as a fecal occult blood test (FOBT), is a diagnostic tool used to detect hidden (occult) blood in stool samples, which can indicate gastrointestinal issues such as polyps, ulcers, or cancers. The test typically involves a chemical reaction that identifies blood proteins, and it is often used as a screening method for colorectal cancer. Patients may be instructed to avoid certain foods and medications before the test to minimize false positives. Positive results usually warrant further investigation through procedures like colonoscopy.
Hemoccult
Chromium
the chemical test that is done to detect blood in the feces in amounts too small to be seen.
We typically test for blood in stool using a fecal occult blood test (FOBT) or a fecal immunochemical test (FIT). These tests detect small amounts of blood that may not be visible to the naked eye, which could be a sign of various gastrointestinal conditions, such as colorectal cancer or ulcers.
The fecal occult blood test is sometimes abbreviated FOBT. Many health professionals call this test a guaiac test, although there are now other technologies available that make this name somewhat anachronistic.
At home, after having a bowel movement, the patient is asked to swipe a sample of stool obtained with a small stick on a card. After three such specimens are on the card, the card is then easily chemically tested for occult blood also.
The stool analysis mentioned here is known as a fecal occult blood test, or FOBT, and, while it can be helpful, it is not 100% accurate--only about 50% of cancers are FOBT-positive.
Detect occult Blood in fecal matter.
assay test of sodium acid citrate
assay
Hemoquant, another fecal occult blood test, is used to detect as much as 500 mg/g of blood in the stool. Like the Hemoccult, the Hemoquant test is affected by red meat. It is not affected by chemicals in vegetables.
A typical medical test that requires a stool sample is the fecal occult blood test, used to detect colon cancer.