Abstract
To study relationship between surgical incision of bladder outlet and urine flow dynamics, a model of intra-urethral shape with BOO and the post-surgical models, incised at 6 o'clock or 5 and 7 o'clock direction of the bladder outlet, were generated. For each model, internal flow during micturition was calculated. Then the intra-urethral flow was visualized and transition of fluid energy was calculated. Then by difference between methods of incision for bladder outlet, changes in urine flow states have different property. And also amount of loss of energy were different by location in the urethra. Different changes in the shape of the urethra between models of two methods made different influences to urine flow dynamics. Therefore it is suggested that mechanism of beneficial change in urine transport efficiency would be different depend on how to change shapes of urethra.
