Not true about urethral injuries is

This is very well known that in a pt. of urethral injury, catheterization is not done b/c it would conve a paial tear into a complete transection of the urethra*. Blood at the urethral meatus is the single most impoant sign of urethral injury. The presence of blood at the external urethral meatus indicates that immediate urethrography is necessary to establish the diagnosis. Bladder injury (either intraperitoneal or extraperitoneal) is associated with posterior urethral injuries.