导尿可引起医源性感染。本文分析４５例前列腺增生并发急性尿潴留，留置导尿引流引起尿路感染的情况。１　资料与方法 本组４５例均为前列腺增生并发急性尿潴留。年龄６２—７５岁，平均６８．５岁。作尿道留置导尿管后，行膀胱尿常规检查和尿细菌培养。尿常规和尿培养正常者， Catheterization can cause iatrogenic infection. This article analyzes 45 cases of benign prostatic hyperplasia complicated by acute urinary retention, indwelling catheter drainage caused by urinary tract infection. 1 Materials and Methods The group of 45 patients with benign prostatic hyperplasia and acute urinary retention. Age 62-75 years, mean 68.5 years old. After catheterization for urinary tract catheterization, urinary bladder routine examination and urine bacterial culture. Urine and urine culture were normal,