Fecal occult blood test (OBT)

The fecal occult blood test means that when the amount of gastrointestinal bleeding is small, the naked eye cannot see blood in the feces, and a small amount of red blood cells in the feces are destroyed. It is of great value in the diagnosis of gastrointestinal bleeding and is often used as a screening indicator for early diagnosis of malignant tumors of the digestive tract. Basic Information Specialist classification: Digestive examination classification: feces / parasitic examination Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: Negative is normal. Positive: It is intermittently positive in ulcerative bleeding of the digestive tract, and it is persistently positive in cancer of the digestive tract, so it can be used as an identification of benign and malignant hemorrhage. Positive also seen in intestinal tuberculosis, ulcerative colitis, colon polyps, hookworm disease, renal hemorrhagic syndrome and so on. Tips: The day before the fecal examination, the diet should avoid pig iron, duck blood, spinach and other iron-rich foods. Normal value negative. Clinical significance Abnormal results: Positive in the digestive ulcer bleeding is intermittent positive, and the digestive tract cancer is persistent positive, so it can be used as an identification of benign and malignant hemorrhage. Positive also seen in intestinal tuberculosis, ulcerative colitis, colon polyps, hookworm disease, renal hemorrhagic syndrome and so on. Need to check the crowd: A healthy person over the age of 40 is generally required to have a occult blood test every year as a health screening test. Positive results may be diseases: pediatric gastrointestinal bleeding, neonatal necrotizing enterocolitis, small intestine adenocarcinoma, primary intestinal malignant lymphoma, pediatric acute gastritis, intestinal parasitic disease, primary intestinal ulcer, chronic non-atrophy Gastritis precautions Requirements for inspection: It is also best for women to do fecal examinations to avoid menstruation so as not to mix blood. Note before inspection: 1. One day before the fecal examination, the diet should avoid foods rich in iron such as pig liver, duck blood and spinach. 2, intake of drugs causing gastrointestinal bleeding, such as aspirin, corticosteroids, non-steroidal anti-inflammatory drugs, can cause false positive test of chemical occult blood test. Ingestion of large amounts of vitamin C can cause false negatives in the occult blood test. Chemical examination of upper gastrointestinal bleeding (stomach, duodenum, etc.) is reliable, and the immune method is mainly suitable for the examination of bleeding in the lower digestive tract (small intestine, large intestine). Inspection process Fecal occult blood test: Take a small amount of stool on the fecal occult blood test paper, and then add 3% hydrogen peroxide and observe. Not suitable for the crowd There are no taboos. Adverse reactions and risks This check will not cause complications or harm.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.