Urethral Injury
Damage to the tube that carries urine out of the body
Quick Facts
- Type: Urologic injury
- Common causes: Pelvic fracture, straddle injury, procedures
- Main signs: Blood at the opening, trouble urinating
- More common in: Men, due to the longer urethra
Overview
The urethra is the tube that carries urine from the bladder to the outside of the body. A urethral injury is damage to this tube, ranging from a minor bruise or partial tear to a complete disruption where the tube is torn apart. Because the urethra is longer in men, urethral injuries are more common in men, often in connection with pelvic fractures or straddle-type falls.
A urethral injury can make it difficult or impossible to urinate and, if not treated properly, may lead to scarring and narrowing of the tube (stricture) later. Prompt evaluation after a pelvic or genital injury helps protect the urethra and guide the right treatment.
Symptoms
Signs of a urethral injury usually appear right after trauma or a procedure. They include:
- Blood at the opening of the urethra (the tip of the penis or vaginal opening)
- Blood in the urine
- Difficulty or inability to urinate
- Pain in the lower abdomen, pelvis, or genital area
- Bruising or swelling of the genitals or perineum
- A full, painful bladder from being unable to empty it
Blood at the urethral opening after a pelvic injury is an important warning sign. Inability to urinate with a painful, swollen bladder needs urgent care.
Causes
Urethral injuries result from force or instrumentation affecting the tube. Common causes include:
- Pelvic fractures: Severe pelvic trauma can tear the part of the urethra deep in the pelvis, especially in men.
- Straddle injuries: Falling onto a hard object, such as a bicycle frame or fence, can crush the urethra against the pubic bone.
- Penetrating trauma: Stab or gunshot wounds and some sexual injuries.
- Medical procedures: Catheter placement or instruments passed through the urethra can occasionally cause injury.
The location of the injury, whether toward the front or deeper in the pelvis, affects how it is treated.
Risk Factors
- Major pelvic trauma or pelvic fracture
- Male sex, due to the longer urethra
- High-impact falls or straddle accidents
- Procedures involving catheters or instruments
- Previous urethral surgery or stricture
Diagnosis
When a urethral injury is suspected, doctors avoid blindly placing a catheter, which could worsen the damage. Evaluation may include:
- Physical exam: Checking for blood at the urethral opening, bruising, and a swollen bladder.
- Retrograde urethrogram: An X-ray taken after contrast dye is gently introduced into the urethra to show where it is torn.
- CT imaging: To assess pelvic fractures and other injuries.
These tests help determine whether the urethra is partially or completely disrupted and where the injury lies.
Treatment
Treatment depends on the type and location of the injury and on other injuries present.
- Urinary drainage: A catheter placed into the bladder, sometimes directly through the lower abdomen (suprapubic), drains urine while the urethra rests and heals.
- Delayed repair: Many complete tears are managed first with drainage, then repaired surgically once swelling and other injuries have settled.
- Surgery: Some injuries, particularly certain penetrating wounds, are repaired early.
- Stricture treatment: If scarring narrows the urethra later, procedures or surgery can reopen it.
Close follow-up is important because strictures can develop months to years after the original injury.
Prevention
- Wear a seatbelt and protective equipment to reduce pelvic trauma
- Use caution around bicycle frames, fences, and other straddle hazards
- Ensure catheters and procedures are performed carefully by trained staff
- Seek prompt care for any genital or pelvic injury
When to See a Doctor
Seek emergency care after any pelvic or genital injury if you notice:
- Blood at the opening of the urethra
- Inability to urinate, especially with a painful, swollen bladder
- Blood in the urine after trauma
- Severe pelvic or genital pain, bruising, or swelling
Do not try to force urination or place a catheter yourself. Prompt, careful evaluation protects the urethra and lowers the risk of long-term narrowing.
Frequently Asked Questions
What causes a urethral injury?
Common causes include pelvic fractures, straddle falls onto a hard object, penetrating wounds, and instruments or catheters passed through the urethra. These injuries are more common in men because the male urethra is longer.
What is the main warning sign of a urethral injury?
Blood at the opening of the urethra after a pelvic or genital injury is a key sign. Difficulty or inability to urinate, blood in the urine, and a painful, swollen bladder are also important warnings that need urgent care.
Why shouldn't a catheter be placed if a urethral injury is suspected?
Pushing a catheter through a torn urethra can worsen the damage. Doctors usually check for injury first, often with a special X-ray, and may drain urine through the lower abdomen instead while the urethra heals.
How is a urethral injury treated?
Many injuries are managed first with urinary drainage to let the urethra rest, followed by surgical repair when appropriate. The exact approach depends on whether the tear is partial or complete and where it is located.
Can a urethral injury cause long-term problems?
Yes. Scarring can narrow the urethra months or years later, causing a weak stream or difficulty urinating. This narrowing, called a stricture, can be treated, so follow-up care is important.
References
- Urology Care Foundation, American Urological Association. Urethral Trauma.
- Mayo Clinic. Pelvic trauma and urinary injuries.
- MedlinePlus, U.S. National Library of Medicine. Urethral injury.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Urethral stricture disease.