[Original experience in plastic surgery of pelviureteral segment in hydronephrosis in children].

The study of postoperative urodynamics of the upper urinary tract was made in 339 patients with obstruction of the pyeloureteral segment and on experimental animals (morphological tests). This study revealed factors deteriorating functional capacity of anastomosis in early postoperative period. The findings allow the surgeons to update the technique of the pyeloureteral segment resection and uretero-pyeloanastomosis, to determine indications for applying nonsteroid anti-inflammatory drugs in the postoperative period, to reveal advantages and establish indications for drainage-free pyeloplasty. Thus, use of drainage-free modified technique of pyeloplasty in certain indications is a safe and less traumatic method of the patients' management which increases efficacy of Anderson-Hines operation.