Urinary extravasation occurred in 2 cases.Conclusions:Ureteroscopy can increase the cure rate in the treatment of urethrostenosis or urethratresia, especially for children cases.
But in severe cases urine lingers in the urinary tract for so long, that there is little flow through the urethra which allows bacteria to move up the urethra and cause an infection.
But let's assume for the sake of polite conversation that you have found an appropriate location to relieve yourself: Your urine enters the thin but muscular urethra by passing through the internal urethral sphincter.
In a voiding cystourethrogram, a contrast dye is injected into the bladder through a catheter, and x-ray images are taken to see if the dye moves from the bladder up into the ureters and kidneys.
And finally we have the pea-sized bulbo-urethral glands below the prostate, that secrete a clear mucus that drains into the urethra to clear out any acidic urine prior to ejeculation.