Since obstruction can be satisfactorily defined only in dynamic terms, it is not surprising that in a difficult case, a dynamic means of investigation is needed. The dynamic approach described in detail has been proved to be of great value in a variety of clinical situations. Further, both the apparatus and the technique are well within the scope of any urologist with access to radiologic equipment.
由于梗阻只能用动态的概念来令人满意地界定，因此在疑难病例中需要采用动态的检查方法就不足为奇了。已详细描述的动态检查方法在各种临床情况下都已证明具有很大价值。此外，无论是设备还是技术，对于任何能够使用放射学设备的泌尿科医生来说都完全在其能力范围内。
