The cause gastrointestinal bleeding and location diagnosis

1.large number of bright red blood and have chronic hepatitis, schistosomiasis and other history, with liver palms, abdominal varicose veins, splenomegaly, ascites, and other signs, to portal hypertension esophageal variceal bleeding was the largest possible. Over the age of 45 chronic persistent stool Punic blood tests positive, with iron deficiency anemia should consider gastric cancer or esophageal hiatal hernia. Or is taking anti-inflammatory analgesic drugs adrenal cortex hormones history or severe trauma, surgery, sepsis, bleeding to stress ulcer and acute gastric mucosal lesions as possible. Over 50 years of age is unknown obstruction and hematochezia, should consider colon tumor. Over the age of 60 have Guanxin, atrial fibrillation history of abdominal pain and hematochezia, ischemic enteropathy likely to be greater. Suddenly abdominal pain, shock, hematochezia have to immediately think of aneurysm rupture. Jaundice, with fever and abdominal pain, gastrointestinal bleeding, biliary tract bleeding can not be derived except common bile duct stones in the bile duct or roundworm disease.
2. Special diagnostic methods in recent years, a clinical study of bleeding great progress, in addition to using the traditional method 1 - X-long irrigation or barium meal examination, endoscopy has been a general application in the diagnosis and development on the basis of the blood treatment.
(1) X-ray barium examination: apply only to bleeding has stopped and patients in stable condition, the diagnosis of acute gastrointestinal bleeding, the positive rate is not high.
(2) endoscopic examination
(3) angiography
(4) radionuclide imaging: In recent years, application of radionuclide imaging examination to discover the site of active bleeding, and its method is intravenous injection of 99m Tc colloid after abdominal scan to detect markers of vascular spillover from the evidence, until the preliminary directional role.