Objective: Analyzing the clinical effects and the values about application of the trimethyphloroglucin in the double-balloon enteroscopy examination. Method: There are 198 patients who accepted the double-balloon enteroscopy examination in the 2rd hospital of Zhengzhou university between June 2007 to Semptember 2008.Two groups in random:18 patients are the testing group and 18 patients as control group before the operations.We observed the bellyache

enteroscopy completion time and the changes in blood pressure and heart rate before

during and after examination. Result: Two groups have no significant difference in pain scores.Completion time of test (phloroglucinol) group was shorter than that of the control group.Each group checks blood pressure and heart rate before

during and after examination have no significant difference.The difference of pain and the completion time was not statistically significant. Conclusion: The injection of phloroglucinol before double-balloon enteroscopy examination can partly alleviate the pain and shorten the examination time.Without significant side.