Extraction of ureteral calculi with the Dormia basket.

The Dormia basket was successfully used for stone extraction on 260 occasions, the original technique having been slightly modified and the indications for instrumental techniques substantially extended. The results are analysed primarily under the aspect of complications. These were of minor severity in 69 cases (26.4%) and of major severity in 14 cases (5.38%). Instrumental stone extraction offers the best chances if the stone is located in the distal third of the ureter and is not larger than 10 mm. The possible complications inherent even in this procedure emphasize the importance of a flexible therapy in renal calculosis in accordance with the individual situation.