, In particular, have already been diagnosed as gastric ulcer patients. If the stool turned black from the normal, it should be alert to the possibility of bleeding, and you should find a doctor, and make necessary checks to ascertain whether gastric ulcer bleeding.
Then the emergence of black, suggesting that blood loss was 50-80 ml. If shiny tar-like stool but with a sticky, you are prompted to increase the amount of bleeding. 100-200 ml of blood test will be the introduction of the stomach, occurred tarry stools, but usually 400-500 ml can be constant if tarry stools occur. After 1000 ml of blood into the stomach, such as by rapidly discharged within 4 hours of red blood; such as blood in the intestines for 20 hours, it appears tarry. These observations consistent with the clinical phenomenon.
Must be noted that a small amount of bleeding, the naked eye have not seen, must use occult blood test. Fecal occult blood positive, suggesting that bleeding is about 5 ml or more. Occult blood test was positive people should also consider the following possibilities:
(1) the impact of diet and drugs.
(2) a small amount of bleeding lesions.
(3) significant bleeding after the recovery period.
(4) harbinger of impending severe bleeding.
Often a small amount of active ulcer bleeding, occult blood lost that improvement or healing of ulcers, if occult blood for 1 month or more, should be suspected of malignancy.
Gastrointestinal hemorrhage: fecal occult blood test duration depends on the nature and focus the amount of bleeding. The introduction of 15-50 ml of blood to the stomach, the fecal occult blood sustainable 2-7 days. Into 1000 ml of blood, the tar-like 1-3 days will be sustainable, sustainable positive fecal occult blood 11-14 days. If the bleeding is one of the lesions, the situation is much the same. After determining the clinical gastrointestinal bleeding, occult blood became negative for the time, average about two weeks.
Clinicians personally observed fecal shape, color is very important, if in pieces, must choose to open in order to observe its internal shape, color. Because fecal have formed in the next section of the colon, location, the more amorphous, so the mix of feces and blood is also very important. If the schedule tarry stools after feces gradually forming, reducing the extent of the black, that is better, and soon the yellow dung can be converted to