[The voiding after the suburethral sling operation, obstructive or non-obstructive?].

To examine whether or not the suburethral sling operation produces obstruction during voiding, seven females who underwent the sling operation using synthetic material (Vesica Sling Kit) were studied postoperatively urodynamically. Uroflowmetry and residual urine measurement showed no overt voiding difficulties in any cases. However, in one case, a pressure flow study indicated equivocal and the position of the sling material was judged to be too proximal by fluoroscopic monitoring. In all other 6 cases pressure flow was shown to be non-obstructive. Fluoroscopic finding also demonstrated in these 6 cases an appropriate bladder neck opening at the time of voiding and the sling was positioned just from the bladder neck to mid-urethra. Thus, it is concluded that the suburethral sling operation produces no obstruction as long as the position of the sling material is carefully determined from bladder neck to mid-urethra and excessive tension is avoided.