This injury involves damage to the bladder or urethra caused by external force.
Alternative Names
Injury - bladder and urethra; Bruised bladder; Urethral injury; Bladder injury; Straddle injury; Pelvic fracture; Urethral disruption
Causes, incidence, and risk factors
Injuries to the bladder can be divided into blunt trauma (such at that caused by a motor vehicle accident) or penetrating wounds (such as bullet or stab wounds). The nature of the injury to the bladder depends on the fullness of the bladder at the time of injury as well as the mechanism of the injury.
Traumatic injury to the bladder is uncommon. Only about 8-10% of pelvic fractures are associated with the bladder injury. The bladder is located within the bony structures of the pelvis, and is protected from most external forces. Injury may occur if there is a blow to the pelvis that is severe enough to cause the bones to break and bone fragments to penetrate the bladder wall. Other causes of bladder injury include surgeries of the pelvis or groin, including hernia repair and abdominal hysterectomy . Injury to the urethra (the tube that carries urine out of the body) is slightly more common, especially in men. It is rare in women. Injury to the urethra includes cuts, tears, bruises, and similar injuries.
Injury to the bladder or urethra may cause urine to leak into the abdomen, leading to infection ( peritonitis ). This type of injury is more common if the injury occurs when the bladder is full. There may be severe bleeding and loss of fluids. Scarring (stricture) or obstruction of the bladder or urethra from swelling may develop, leading to urinary stricture, obstruction, and retention. This may eventually cause vesicoureteric reflux or bilateral obstructive nephropathy (a type of kidney damage). There is an increased chance of developing urinary tract infections after injury to the tissues of the urethra or bladder, caused by stasis (stagnation) of retained urine.
Signs and tests
Examination of the genitals may indicate injury to the urethra. Blood at the urethral meatus and high riding prostate on rectal exam may suggest an urethral injury. If an urethral injury is suspected, a retrograd urthrogram should be performed to adequately delineate the anatomy of the lower urinary tract. Palpation (slight pressure or distention) over the bladder may show tenderness. Palpation may indicate bladder fullness, caused by retention of urine. Examination of the abdomen and/or rectum may indicate bladder injury or may show distended bladder. Or, if the bladder lining has been disturbed, urine may escape from the bladder into abdominal cavity, and the patient may only complain of vague abdominal pain/discomfort associated with inability to void. There may be signs of hemorrhage or shock , including decreased blood pressure -- especially in cases of pelvic fracture. MAST trousers may be applied to reduce pelvic bleeding. A Foley catheter (artificial tube to drain urine from the body) is usually inserted as a part of trauma protocol. If bladder or urethral injuries are suspected, an urological consultation should be obtained prior to attempting to use any urinary catheter.
Treatment
The goals of treatment are control of symptoms, repair of the injury, and prevention of complications. Emergency treatment of bleeding , shock , or hemorrhage may include intravenous fluids or blood and monitoring in the hospital.
Treatment of peritonitis may include emergency surgery to repair the injury and to drain the urine from the abdominal cavity. Antibiotics may be given to treat peritonitis and to prevent the development of urinary tract infections . Surgical repair of the injury is usually successful. The bladder may be drained by a catheter, through the urethra or the abdominal wall, for days to weeks. This will prevent urine from accumulating in the bladder, which allows the injured bladder or urethra to heal easier. This also prevents obstruction of urine flow caused by urethral swelling.
Expectations (prognosis)
Traumatic injury of the bladder and the urethra may range from minor and self-limiting in some cases, to major and life-threatening in others. There may be severe, immediate, or long-term complications.
Calling your health care provider
Go to the emergency room or call the local emergency number (such as 911), if symptoms of traumatic injury of the bladder or urethra occur -- particularly if there is a history of injury to the area.
Call your health care provider if symptoms worsen or new symptoms develop, including symptoms of shock or hemorrhage (see symptoms), fever , severe abdominal pain , severe flank or back pain , or decrease in urine production.
Prevention
External damage to the bladder and urethra may be prevented by using general safety precautions. Use appropriate safety equipment during work and play. Do not insert objects into the urethra. If self-catheterization is required, follow the instructions of the health care provider.