[The combination of extracorporeal lithotripsy and percutaneous nephrostomy in the treatment of obstructive ureteral urate calculi].

The authors report their experience with combined percutaneous nephrostomy and extracorporeal shock-wave lithotripsy to treat obstructive uratic ureteral stones. The role of nephrostomy is stressed as a diagnosis and treatment method before, during and after lithotripsy. Thus, the method proved especially useful to drain obstructed kidneys and restore peristalsis, to evacuate septic urine, to facilitate the elimination of lithiasic fragments, to perform anterograde pyelography before, during and after lithotripsy and finally to allow pharmacological litholysis. Fourteen patients were successfully treated with combined extracorporeal lithotripsy and percutaneous nephrostomy and the results compared with those obtained with other techniques--e.g., ureteroscopy, whose value appears lower because the method requires general anesthesia and is more traumatic to the ureter. The authors conclude that combined extracorporeal lithotripsy and percutaneous nephrostomy make the best technique to treat obstructive uric acid stones thanks to their positive results, low invasiveness and to patients compliance.