目的讨论活检标本大小和数目对尿素酶试验结果的影响。　方法按活检标本的大小、数目及不同的钳取部位分组 ,分别进行尿素酶试验 ,观察试验结果。　结果不同组别标本的试验结果的敏感性和特异性均有不同程度的差别。　结论本试验结果提示尿素酶试验结果与活检标本中的标本大小、数量和钳取部位有直接关系。 Objective To discuss the influence of the size and number of biopsy specimens on the urease test results. Methods According to the size and number of biopsy specimens and different parts of forceps, urease tests were conducted respectively and the test results were observed. Results The sensitivity and specificity of the test results of different groups of specimens have different degrees of difference. Conclusion The results of this test suggest that the urease test results are directly related to the specimen size, number and location of the clamp in biopsy specimens.