我院自1993年6月至2000年6月行常规静脉肾盂造影(ＩＶＰ)检查5886例,有500例显示单侧肾“无功能”或部分肾盏显影,作者对这些患者继续作大剂量利尿性延时性ＩＶＰ检查,提高了Ｘ线诊断率。现报告如下。一、资料和方法1.一般资料　500例均为上尿路梗阻患者,男性354例、女性146例; Our hospital from June 1993 to June 2000 underwent routine intravenous pyelography (IVP) examination of 5886 cases, 500 cases showed unilateral renal “non-functional” or partial calyx imaging, the author of these patients continue to make high-dose diuretic Sex-delayed IVP test, improve the diagnostic rate of X-ray. The report is as follows. First, the data and methods 1 General information 500 patients were upper urinary tract obstruction patients, 354 males and 146 females;