Objective   To introduce an improved implantation for urethral stent with amphi-oncoides in patients with neurogenic voiding dysfunction and to evaluate its curative effect.    Methods   Totally 21 cases with infrasacral neurogenic voiding dysfunction were treated by implanting individualized urethral stents with amphi-oncoides. The urethral stent was implanted between the bladder neck and the urethral external sphincter muscle by transurethral operation. The following preoperative parameters were used to evaluate the outcome by comparing with thos

e postoperatively: urinary output

urine residual volume (URV)

urodynamic tests

renal hydronephrosis degree

and blood serum inosine and urea nitrogen.    Results   In the 19 patients with follow-up

the parameters were improved significantly after operation. The average urinary output volume was increased from 234.3 ml up to 385.4 ml. The average urine residual volume was decreased from 327.3 ml down to 45.2 ml. The average detrusor leak point pressure was decreased from 63.1 cmH

2

O to 32.4 cmH

2

O. The average max voiding pressure was declined from 126.0 cmH

2

O to 76.0 cmH

2

O. The average Qmax was elevated from 6.3 ml/s up to 16.5 ml/s. Renal hydronephrosis degree

and blood serum inosine and urea nitrogen were improved significantly (P0.05). No case has serious urinary incontinence or stent displacement. Urethral stone was found in one case.    Conclusion   This procedure is effective in treating neurogenic lower urinary tract dysfunction with no urinary incontinence and stent displacement. It protects the function of upper urinary tract and improves the life quality of those patients.