Rectal examination:-

http://www.patient.co.uk/doctor/pelvic-fractures

• Rectal examination: for anal tone, palpable fractures and to detect bleeding, rectal tears and urethral damage. Signs of urethral injury in males include a high-riding or boggy prostate on rectal examination, scrotal haematoma, or blood at the urethral meatus.
• Instability on hip adduction and pain on hip motion suggests an additional fracture of the acetabulum.
• A pelvic fracture in females is suggested by vaginal bleeding or a palpable fracture line on bimanual examination.