放射性核素肾图对尿路梗阻的诊断很有帮助,但当肾、输尿管有扩张改变时,由于搀和效应(mixing chamber effect)的影响,进入扩大的肾盂腔内的示踪物质往往不易迅速排除,因而所表现的梗阻性图形,和真正的机械性梗阻不易区别。如先给予利尿剂,增加尿流量,然后再注射示踪剂作肾图(以下称利尿肾图),则可以提高诊断价值。为此,我们从1979年6月开展了利尿肾图检查。现 Radionuclide nephrograms are useful in the diagnosis of urinary tract obstruction, but when the kidneys and ureters have dilated changes, the tracer material entering the enlarged renal pelvis is often not easily removed quickly due to the mixing chamber effect , So the performance of obstructive graphics, and real mechanical obstruction is not easy to distinguish. If you give diuretics, increasing urine flow, and then injecting tracer for renal mapping (hereinafter referred to as diuretic nephrogram), you can improve the diagnostic value. To this end, we conducted from June 1979 diuretic nephrectomy. Now