Abstract: ObjectiveTo compare the gastric juice occult blood test for hemoglobin and transferrin with microscope examination of specimens of gastric juice,to explore the value of the microscopic examination as an auxiliary method for diagnosis of upper gastrointestinal bleeding. MethodsTwo immune colloidal gold methods of hemoglobin and transferrin were used to test the clinical specimens of the gastric juice and compared with microscopic examination. ResultsEighty two cases of gastrointestinal bleeding,from 113 specimens of gastric juice,were clinically diagnosed.The sensitivity of hemoglobin,transferrin detection methods and microscopy method for gastric juice tests were 63.4%,64.6%and 87.8%,respectively：the specificity of the three methods was 80.6%,71.0% and 87.1%,with the positive predictive value of 89.6%,85.5% and 94.7%,respectively. The negative predictive value was found to be 45.5%,43.1% and 73.0%,with the efficiency of diagnosis of 68.1%,66.4% and 87.6%. No significant statistical difference was noted between the clinical diagnosis and microscopic method. m（P>0.05）.The two immune colloidal gold methods for hemoglobin and transferrin tests,however,were statistically significant（P<0.01）. ConclusionMicroscopic examination of gastric juice presents the promising sensitivity and specificity,and auxiliary diagnostic value for upper gastrointestinal bleeding.

Key words: Occult, blood, of, gastric, juice, Immune, colloidal, gold, method, Microscopic, examination