Abstract
Recent innovations in technique and equipment for radiological evaluation of the urinary tract have improved the accuracy of many procedures. These improvements do not increase the hazard of the procedure, and the expense increase is modest. We have found the following adjuncts useful. Repeat-Injection Urography We have previously reported our early experience with repeat-injection urography, a simple modification to enhance the diagnostic value of intravenous urograms by a delayed, second administration of radiopaque agent.1 Technique.— The method is as follows: Films are taken three and five minutes after an initial injection of 30 cc of iothalamate sodium 66.8% (Conray400). The films are processed and reviewed at once. If opacification of the urinary tract is not satisfactory, another injection of contrast medium is given immediately. The resulting time is approximately 10 to 15 minutes after the first injection, but it may be delayed for as long as two hours. Clinical
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