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Bladder Trauma

Bladder trauma is rupture or laceration of the bladder wall, most often after blunt injury. Risk estimates depend on the population: a single-center series of 5,518 pelvic fractures found bladder injury in 3.2% of men and 3.3% of women; the AUA guideline reports bladder injury in approximately 29% of patients with both pelvic fracture and gross hematuria, and a prospective single-center study of blunt trauma found bladder injury in 27% (21/78) and 16% (15/91) of patients imaged for gross hematuria across its two study periods.[1][5][8] The most common mechanism is pelvic ring distortion transmitting force to the perivesical structures. Hydraulic rupture at a distended dome is the hallmark of intraperitoneal injury. Diagnosis uses dedicated retrograde cystography rather than passive filling, and repair strategy follows injury type.

Cross-Reference — Imaging. Detailed cystography technique and CT protocol interpretation is covered in Imaging (Evaluation & Workup).

Classification​

Bladder injuries are classified by the location of urinary extravasation relative to the peritoneum:

TypeFrequency (Blunt)MechanismKey Features
Extraperitoneal (EPB)~63%[3]Pelvic ring distortion, bony fragment, contrecoup60–90% associated with pelvic fracture; urine confined to extraperitoneal space
Intraperitoneal (IPB)~32%[3]Hydraulic rupture of distended domeUrinary ascites; ileus; risk of peritonitis
Combined<5% (ACS, blunt trauma)[3]; 5–8% (EAU, mechanism unspecified)[6]High-energy polytraumaBoth components; operative repair required

In a retrospective cohort of 721 patients with blunt pelvic fracture, pubic-symphysis diastasis >1 cm and obturator-ring displacement >1 cm were associated with bladder rupture.[2]

AAST Bladder Injury Scale​

GradeDescription
IContusion; intramural hematoma; partial-thickness laceration
IIExtraperitoneal laceration <2 cm
IIIExtraperitoneal laceration ≥2 cm, or intraperitoneal laceration <2 cm
IVIntraperitoneal laceration ≥2 cm
VExtension into the bladder neck or ureteral orifice (trigone)

Advance one grade for multiple bladder lesions, up to Grade III, following the AAST organ injury scale convention.[7]

Complex Extraperitoneal Injury​

Features favoring repair include the following; the pelvic-fixation indication requires coordination with the trauma and orthopaedic teams.[3][5][6]

  • Concomitant urethral or bladder neck injury
  • Concomitant vaginal or rectal injury
  • Intravesical clot burden impairing catheter drainage
  • Intraluminal foreign body (bone fragment, projectile)
  • Entrapment of the bladder wall in the pelvic fracture[6]
  • Planned anterior pelvic internal fixation: ACS favors repair; EAU notes conflicting evidence on hardware infection

Imaging — Cystography Protocol​

Indication: In stable patients, gross hematuria with pelvic fracture is an AUA Standard (Statement 14a; Grade B). In stable patients, gross hematuria with a concerning mechanism, or pelvic-ring fracture with clinical indicators of rupture (low urine output, urinary ascites, rising creatinine or abdominal distension), also warrants retrograde cystography (Statement 14b; Recommendation, Grade C).[5] Penetrating pelvic injury with gross or microscopic hematuria requires bladder evaluation.[3][5]

Microhematuria alone without high-risk features in stable blunt trauma does not require cystography. Gross hematuria is the principal sign: a prospective single-center comparison reported 100% sensitivity and 98.5% specificity for gross hematuria as its screening trigger, but patients with microscopic hematuria in the second study period did not undergo cystography.[8] A separate 44-case series found gross hematuria in 95%.[9] Under the EAU guideline, microscopic hematuria with a high-risk pelvic fracture (pelvic-ring displacement or symphyseal diastasis over 1 cm) or posterior urethral injury is an absolute indication for bladder imaging.[5][6]

Passive antegrade filling (clamping the Foley during CT) does not distend the bladder adequately. The ACS guideline states it is inadequate to evaluate for bladder injury and is not a substitute for retrograde cystography.[3][5]

CT Cystography (Preferred)​

  • Dilute contrast retrograde fill: 50 mL iohexol in 500 mL normal saline (approximately 2–5 g iodine/100 mL)[3]
  • Minimum fill volume: 300 mL (or until patient discomfort or contrast stops flowing)[3]; EAU strongly recommends active retrograde filling with 300–350 mL of dilute contrast[6]
  • Image after full distension; post-drainage images are not routinely required
  • In stable patients with meatal blood and pelvic fracture, ACS advises bedside retrograde urethrography before routine urethral catheter placement.[3]
  • CT cystography can be performed by the radiology technologist with the Foley in place; no need for patient transport to fluoroscopy

Conventional (Fluoroscopic) Cystography​

  • Higher-density contrast: diatrizoate meglumine (Cystografin) or iothalamate meglumine at approximately 8–25 g iodine/100 mL[3]
  • Retrograde gravity filling to at least 300 mL or patient tolerance; AUA requires a maximal-fill image and a post-drainage image, with additional views as needed[5]
  • Views: AP, bilateral obliques and post-drainage images; add a lateral view if concern persists without a visible leak
  • Sensitivity and specificity are similar to CT cystography (approximately 90–95% sensitivity, approximately 100% specificity)[3][4]

Management​

Nonoperative Management (Uncomplicated EPB)​

AUA recommends catheter drainage for uncomplicated extraperitoneal bladder injury (Statement 16; Recommendation, Grade C). The following ACS pathway concerns blunt trauma:[3][5]

  • Continuous large-bore urethral catheter drainage (≥18 Fr)
  • Drainage duration differs by guideline: ACS specifies at least 7 days; AUA describes 2–3 weeks as standard, adjusted for healing and associated injuries[3][5]
  • Confirm healing with repeat cystography before catheter removal; EAU plans the first cystogram approximately 10 days after injury and gives a weak recommendation for conservative management of uncomplicated blunt extraperitoneal injury[6]
  • No high-level evidence supports antibiotic prophylaxis for the catheterization duration; ACS notes it may be considered with anterior pelvic hardware[3]

Operative Management​

For temporary drainage and deferred repair in the unstable patient, see Damage Control in Genitourinary Trauma.

Indications for operative repair:

  • Intraperitoneal rupture from blunt or penetrating external trauma ; EAU describes conservative treatment of selected uncomplicated iatrogenic intraperitoneal perforations after TURBT or other operations when peritonitis and ileus are absent[5][6]
  • Complicated extraperitoneal injury [5]
  • Bladder injuries found incidentally at exploratory laparotomy: repair according to injury type
  • Most penetrating bladder injuries require exploration; in gunshot injury, inspect for both entry and exit wounds and associated bowel or rectal injury.[6]
  • EPB during laparotomy for other injuries or pelvic ORIF: AUA advises considering concurrent bladder repair[5]
  • Injury to a neobladder, continent reservoir or augmented bladder: healing is unpredictable and complication risk is high, so most need surgery, and ACS suggests considering tertiary referral[3]

Technique:

  • Open exposure, usually through a lower midline incision; laparoscopic repair is possible in selected isolated injuries
  • IPB: With a pelvic fracture, open the injury widely enough to confirm that no concomitant extraperitoneal injury needs repair
  • EPB (transvesical approach): Wide anterior cystotomy provides full intraluminal exposure including bladder neck and trigone; identify the ureteral orifices and confirm drainage, with catheterization when needed
  • Use absorbable suture and a watertight closure. ACS favors two layers; EAU finds no evidence that two layers outperform a watertight single layer[3][6]. EAU recommends surgical repair of blunt intraperitoneal rupture and of blunt extraperitoneal rupture with bladder neck involvement or associated injuries needing surgery [6]
  • Leave a closed-suction pelvic drain
  • AUA recommends urethral catheter drainage alone after repair (Statement 18; Standard, Grade B). Selected exceptions for an SPT include long-term catheterization, immobilization, a tenuous complex closure or significant hematuria[5]
  • Confirm healing after complex repair and catheter-only treatment. ACS recommends cystography for most repairs at ≥7 days, later for complex injuries; AUA/EAU allow omission after selected simple repairs; EAU states that after repair of a simple injury in a healthy patient the catheter can be removed at 5–10 days without cystography, and strongly recommends cystography after complex repair or with wound-healing risk factors such as steroids or malnutrition. See cystography follow-up for the guideline differences[3][5][6]

Orthopaedic Coordination. When bladder repair and anterior pelvic internal fixation are both indicated, ACS advises considering the same surgical setting.[3] With symphyseal diastasis, consider repairing the bladder first, because reduction can make the repair more difficult or impossible. Discuss catheter positioning with orthopaedics. AUA and EAU find no evidence that appropriate suprapubic drainage increases hardware infection, and ACS reports no adequate studies either way; ACS also notes that many orthopaedic surgeons still regard a definitive SPT as a contraindication to anterior internal fixation and use external fixation instead.[5][6][3] In a 2024 two-center cohort, unrepaired extraperitoneal rupture and suprapubic drainage were associated with deep pelvic infection, but none of the 13 unrepaired patients underwent anterior ORIF.[13] A separate 2024 series found deep infection in 7/106 within 90 days after anterior stabilization, with a higher rate in combined intraperitoneal and extraperitoneal injuries.[14]

Special Populations​

Pediatric: The bladder lies higher above the pelvic ring in children, and intraperitoneal rupture is more common.[15] Smaller capacity requires size-appropriate catheterization and lower retrograde fill volumes: about (7 × weight in kg) + 2 mL under age 2, and (age in years + 2) × 30 mL above age 2.[3] For conventional cystography, EAU strongly recommends filling to capacity and obtaining a post-drainage film.[15] Visible hematuria occurs in about 95% of pediatric bladder injuries; maintain suspicion when the mechanism or findings are concerning, including after bladder augmentation or substitution for congenital anomalies.[15][3]

Older adults: Chronic retention and a distended bladder make rupture more likely after low-force trauma such as a fall from standing or a low-speed collision. Establish baseline voiding status before catheter removal, and restart chronic alpha-blockers before the trial of void (ACS text says 24–72 hours before catheter removal; its key-points box says at least 3 days). Use anticholinergics for bladder spasm cautiously because of dementia risk, and discuss that risk before continuing them.[3]

Pregnant: Bladder displaced superiorly and anteriorly in late pregnancy, increasing IPB risk. Early urologic consultation is advisable.

Neurogenic bladder: Chronically distended bladder is at higher risk for hydraulic rupture from lower-energy mechanisms.

Iatrogenic (TURBT): Perforation during transurethral resection of a bladder tumor is usually extraperitoneal and has been attributed to loop overshoot beyond the tumor, the obturator reflex during lateral-wall resection, anterior bladder-wall movement with respiration, or excessive wall tension during a deep resection.[11] Reported incidence depends heavily on ascertainment: a small prospective cohort with routine postoperative cystography found extraperitoneal contrast extravasation in 21 of 36 patients (58.3%), whereas a separate retrospective series of 1,284 patients recorded 49 bladder perforations (3.8%) and found perforation more often in women than men (7.2% vs 2.6%, p < 0.001).[10][12] Intraoperative cystography can confirm a suspected perforation; once hemostasis is achieved, further resection and irrigation are typically stopped to limit extravasation. Bipolar TURBT uses isotonic saline irrigation, avoiding dilutional hyponatremia from absorbed electrolyte-free irrigant.[16] Comparative studies report conflicting bladder-perforation rates with bipolar and monopolar TURBT.[11]

Retropubic midurethral sling. EAU strongly recommends cystoscopy to rule out bladder injury during retropubic suburethral sling placement. If bladder perforation is detected, the guideline advises reinserting the sling and draining with a urethral catheter for 2–7 days.[6]

Complications​

  • Persistent urinary extravasation from poor wound healing, technical error, or failed conservative management may resolve with additional catheter drainage; EAU advises cystoscopy for ongoing leakage to exclude intravesical bony fragments and repeat cystography one week later. Refractory cases may need repair or urinary diversion.[3][6]
  • Fistulization to bowel, vagina or skin can follow an unrepaired or inadequately repaired leak.
  • Incontinence or neurogenic bladder dysfunction can follow pelvic nerve injury sustained with the fracture or the bladder injury itself.
  • Delayed presentation, sometimes years to decades later, with pelvic pain, hematuria or infection from erosion of retained pelvic hardware or bony callus into the bladder.

Mortality after bladder rupture is driven mainly by associated injuries (pelvic vascular injury, solid-organ injury, other polytrauma) rather than the bladder injury in isolation.[3][6]

References​

1. Johnsen NV, Dmochowski RR, Young JB, Guillamondegui OD. Epidemiology of blunt lower urinary tract trauma with and without pelvic fracture. Urology. 2017;102:234–239. doi:10.1016/j.urology.2016.11.015. PMID 28043650

2. Avey G, Blackmore CC, Wessells H, Wright JL, Talner LB. Radiographic and clinical predictors of bladder rupture in blunt trauma patients with pelvic fracture. Acad Radiol. 2006;13(5):573–579. doi:10.1016/j.acra.2005.10.012. PMID 16627198

3. American College of Surgeons Trauma Quality Programs. ACS TQP Best Practices Guidelines: Management of Genitourinary Injuries. Chicago, IL; August 2025. ACS guideline PDF

4. Quagliano PV, Delair SM, Malhotra AK. Diagnosis of blunt bladder injury: A prospective comparative study of CT cystography and conventional retrograde cystography. J Trauma. 2006;61(2):410–421. doi:10.1097/01.ta.0000229940.36556.bf. PMID 16917459

5. Morey AF, Broghammer JA, Hollowell CMP, et al. Urotrauma Guideline 2020: AUA Guideline. J Urol. 2021;205(1):30–35. doi:10.1097/JU.0000000000001408. Full guideline, published 2014; amended April 2017 and August 2020.

6. Waterloos M, Campos-Juanatey F, Hallscheidt P, et al. EAU Guidelines on Urological Trauma. Limited update, March 2026. Sections 4.3 (bladder trauma) and 4.4.3 (suprapubic catheter and hardware infection). Full guideline.

7. Moore EE, Cogbill TH, Jurkovich GJ, et al. Organ injury scaling. III: Chest wall, abdominal vascular, ureter, bladder, and urethra. J Trauma. 1992;33(3):337–339. doi:10.1097/00005373-199209000-00001. PMID 1404499

8. Brewer ME, Wilmoth RJ, Enderson BL, Daley BJ. Prospective comparison of microscopic and gross hematuria as predictors of bladder injury in blunt trauma. Urology. 2007;69(6):1086–1089. doi:10.1016/j.urology.2007.02.056

9. Barnard J, Overholt T, Hajiran A, et al. Traumatic bladder ruptures: a ten-year review at a level 1 trauma center. Adv Urol. 2019;2019:2614586. doi:10.1155/2019/2614586

10. Balbay MD, Cimentepe E, Unsal A, Bayrak O, Koç A, Akbulut Z. The actual incidence of bladder perforation following transurethral bladder surgery. J Urol. 2005;174(6):2260–2262, discussion 2262–2263. doi:10.1097/01.ju.0000181811.61199.35

11. Panagoda PI, Vasdev N, Gowrie-Mohan S. Avoiding the obturator jerk during TURBT. Curr Urol. 2018;12(1):1–5. doi:10.1159/000447223

12. Herkommer K, Hofer C, Gschwend JE, Kron M, Treiber U. Gender and body mass index as risk factors for bladder perforation during primary transurethral resection of bladder tumors. J Urol. 2012;187(5):1566–1570. doi:10.1016/j.juro.2011.12.114

13. Saiz AM Jr, O'Donnell E, Kellam P, et al. "Bladder Repair With Irrigation and Debridement and Open Reduction Internal Fixation of the Anterior Pelvic Ring Is Safe and Decreases Risk of Infection in Pelvic Ring Injuries With Extraperitoneal Bladder Ruptures." J Orthop Trauma. 2024;38(2):72–77. doi:10.1097/BOT.0000000000002720

14. Olszewski NP, Sliepka J, Bigham JJ, et al. "Factors Associated With Infection in Patients With Combined Pelvic Ring and Bladder Injuries." J Orthop Trauma. 2024;38(9):459–465. doi:10.1097/BOT.0000000000002846

15. Bogaert G, Burgu B, 't Hoen LA, et al. EAU Guidelines on Paediatric Urology. EAU Guidelines Office; 2026. Section 24.3, Paediatric bladder injuries. Full guideline

16. Thirugnanasambandam V, Ramanathan J. "Safety and efficacy of bipolar energy for transurethral resection of bladder tumours: a prospective quasi-randomized study." Turk J Urol. 2017;43(2):141–146. doi:10.5152/tud.2017.33396