Goldman and Sandler classification of urethral injuries

Grade IPosterior urethra stretched but intact
Grade IIPartial or complete posterior urethral tear above intact urogenital diaphragm
Grade IIIPartial or complete tear of combined anterior and posterior urethra with torn urogenital diaphragm
Grade IVBladder neck injury with extension to the urethra
Grade IVaInjury to bladder base with extravasation simulating type IV 
Grade VIsolated anterior urethral injury