Urinary tract trauma is caused by either blunt or penetrating trauma. Motor vehicle crashes are the most common cause of blunt trauma. Other causes include falls, assaults, occupational (crush) injuries, and sports injuries. The energy of the trauma is dissipated throughout the cavity, which frequently causes rupturing of the bladder or kidney or tearing of the urethra. Penetrating trauma to the urinary tract is frequently the result of a gunshot wound or a stabbing injury. The degree and severity of the damage from a gunshot wound depend on the velocity and trajectory of the bullet. The result is usually localized tissue damage and potential hemorrhage in the highly vascular kidney or the distended bladder.

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