[Anterograde pyelography to assess morphology (author's transl)]

The use of anterograde pyelography to assess morphological changes revealed the presence of obstruction in the upper urinary tract, previously undetected by urography, in 61 patients studied. The technique, used almost exclusively to expose the pelvis over the last year, is described. Only in very rare cases was there a failure to puncture the renal pelvis, and no complications occurred. The relative indication of anterograde and retrograde pyelography are discussed, as well as the morphological data obtained by each method in different types of obstruction: complete, severe incomplete, and partial. The main indications for this procedure are reviewed as a function of the etiology.