Urea cycle defects, 121 Ureaplasma urealyticum, 545 Uremia, 340 , 421 , 560 Ureteral injuries clinical recognition, 1136 evidences, 1136 management/diagnostic testing, 1136 treatment goal, 1136 Ureteropelvic junction (UPJ) disruptions, 1133 , 1307 f obstruction, 1307 f Urethral bleeding, 535 Urethral catheterization, 1137 Urethral injuries assessment/diagnostic testing, 1139 clinical recognition, 1138 evidences, 1138 female urethral injuries, 1139 male lower urinary tract, sagittal section of, 1138 f management, 1139 posterior urethral disruption/pelvic fracture, 1139 f retrograde urethrogram, 1139 treatment goal, 1137 –1138 Urethral prolapse, 535 , 765 –766 , 1339 Urethral syndrome, 530 Urethritis, 383 , 384 t Uric-acid nephropathy, 931 Urinary bladder catheterization, in abdominal trauma, 1087 Urinary frequency differential diagnosis, 529 –531 evaluation and decision, 531 –532 interpretation of urinalysis, 531 , 532 f laboratory evaluation of urinary frequency, 531 extraurinary system, 530 –531 , 530 t pathophysiology, 529 Urinary retention, acute background, 1340