1. There was no complication and ureterostenosis and ureter obstruction after a long follow-up.

2. Conclusion B-ultrasonographic examination in diagnosis of congenital ureterostenosis possesses greater advantage and better clinical value.

3. Objective To study clinical value of ultrasonic diagnosis in the congenital ureterostenosis.

4. Conclusion High pressure balloon catheter dilation is an safe and effective procedure for patients with multi-segment benign ureterostenosis.

5. Objective To investigate the therapeutic effect of high pressure balloon catheter dilation on multi-segment benign ureterostenosis.

6. It was found that influence factors were ureteric orifice stenosis and edema, irregular stones, ureterostenosis, polyp, pregnancy, obesity and so on.