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Pelvic Fracture Urethral Injury (PFUI)

Pelvic fracture urethral injury (PFUI) is a disruption of the membranous (posterior) urethra caused by pelvic ring fractures from high-energy blunt trauma, occurring in 1.5–10% of anterior pelvic fractures. The injury results from distraction of the membranous urethra away from the bulbar urethra as the pelvic ring disrupts. The gold standard initial management is suprapubic tube (SPT) placement, followed by delayed perineal anastomotic urethroplasty (typically 3–6 months later), which achieves success rates of 84–97%.[1][2][3][4][5]

This article is the canonical PFUI page spanning acute trauma management through definitive reconstruction. It is referenced from both the trauma sidebar and the Posterior Urethroplasty / PFUI Repair entry in the urethral-reconstruction atlas. For impassable obliterative strictures, see Core-Through Urethrotomy. For short bulbar EPA, see Excision and Primary Anastomosis.

Epidemiology and Mechanism​

PFUI predominantly affects young males (mean age 28–37 yr) involved in motor vehicle collisions, falls from height, or crush injuries.[1][2][4] The mechanism involves disruption of the pelvic ring — most commonly fractures of the sacroiliac joint, anterior arch with displacement, and/or diastasis of the pubic symphysis — producing shearing forces at the relatively fixed membranous urethra.[1][6]

Each millimeter of symphysis pubis diastasis or inferomedial pubic bone fracture displacement is associated with an estimated 10% relative increased risk of urethral injury.[1][6] Complete injuries (~65%) result in a gap between the two urethral stumps filled with fibrotic tissue; incomplete injuries (~35%) maintain some degree of urethral continuity.[6]

Classification​

Colapinto and McCallum (1977)​

  • Type I — posterior urethra stretched but intact
  • Type II — urethra disrupted at the membranous-prostatic junction above the urogenital diaphragm
  • Type III — disruption of the membranous urethra extending below the urogenital diaphragm, involving the anterior urethra
  • Type IV — bladder neck injury with extension into the proximal urethra
  • Type IVa — injury to the base of the bladder with periurethral extravasation simulating Type IV
  • Type V — isolated anterior urethral injury[7]

AAST Organ Injury Scale​

GradeDescription
IContusion (blood at meatus, normal urethrography)
IIStretch injury (elongation without extravasation)
IIIPartial disruption (extravasation with contrast reaching bladder)
IVComplete disruption (<2 cm separation)
VComplete disruption >2 cm separation, or extension into prostate / vagina
[6][7]

Clinical Presentation and Diagnosis​

Clinical signs​

High suspicion is warranted with any of:[1]

  • Blood at the urethral meatus — most classic sign
  • Suprapubic fullness
  • Perineal laceration or butterfly hematoma
  • Scrotal hematoma
  • Difficulty or inability to pass a Foley catheter
  • Inability to void

A high-riding prostate on rectal examination has low sensitivity and specificity for urethral injury and is no longer recommended as a diagnostic maneuver.[1]

Imaging​

  • Retrograde urethrography (RUG) is the preferred initial modality. Extravasation of contrast without bladder filling indicates complete disruption; extravasation with bladder filling indicates partial injury.[1][6][7]
  • Combined antegrade and retrograde urethrography (via SPT tract) is the fundamental preoperative evaluation before delayed urethroplasty, assessing gap length and alignment.[8]
  • MRI is a valuable adjunct for preoperative planning, providing superior assessment of:[8][9][10]
    • Urethral gap length (more accurate than urethrography)
    • Degree of lateral prostatic displacement
    • Relationship of the urethra to surrounding structures (rectum, dorsal venous complex)
    • Periurethral pathology (fistulae, cavitation)
    • Cavernous body integrity (predicting erectile function)
    • Pubourethral stump angle (PUA) — independent predictor of the need for elaborate surgical approaches (inferior pubectomy, rerouting)[10]

Sequencing: if the patient has a pelvic fracture and CT will assess for arterial extravasation, perform CT first and RUG second — contrast extravasation from urethral injection can produce significant artifact on CT.[3]

Acute Management​

Suprapubic Tube (SPT) — Preferred​

The AUA Urotrauma Guideline (2020) and ACS Best Practices Guidelines (2025) recommend SPT placement as preferred initial management for most PFUI:[1][3]

  • Complete PFUI should be managed initially with SPT.
  • Incomplete injuries may be managed with SPT or urethral catheterization (single gentle attempt by experienced personnel; stop immediately if resistance or new bleeding).
  • SPT should be ≥14 Fr Foley (not pigtail) to ensure adequate drainage and facilitate exchange.
  • Bladder may be displaced by pelvic hematoma — ultrasound, fluoroscopy, or needle aspiration may be needed to localize the bladder for percutaneous placement.
  • Open urethral realignment has no role in PFUI management due to substantially increased complications.[1]

Primary Endoscopic Realignment (PER)​

PER involves simultaneous antegrade / retrograde cystoscopy to place a catheter across the urethral injury. The evidence is conflicting.

The landmark TURNS multicenter prospective cohort study (McCormick 2023, 26 centers, 69 patients with complete PFUI) found that PER was not associated with a lower rate of urethral obstruction vs SPT alone: 97% vs 94% developed obstruction (p = 0.471), and urethroplasty was required in 87% vs 91% (p = 0.784).[11]

A 2025 systematic review and meta-analysis (Owen et al., 11 studies, 769 patients) confirmed comparable rates of stricture (OR 1.23, p = 0.80), incontinence (OR 1.02, p = 0.94), and ED (OR 0.97, p = 0.88) between PER and SPT with delayed urethroplasty.[12]

The ACS Best Practices Guidelines (2025) state: "No strong evidence exists to indicate that PER significantly impacts stenosis rates or complexity of future urethral reconstruction following complete PFUI." However, for partial injuries, successful PER may lower the stenosis rate.[1]

Delayed Definitive Reconstruction — Posterior Urethroplasty​

Timing​

The AUA Urethral Stricture Disease Guideline (2023) recommends that definitive reconstruction be planned only after major injuries stabilize and the patient can be safely positioned for urethroplasty — usually 3–6 months after trauma, though no optimal time has been established (range 6 weeks to 4 yr).[13]

Importantly, Scarberry and Gómez (2018) demonstrated that early reconstruction at 3–6 weeks (when the perineum is soft, the fracture is stable, and associated injuries permit lithotomy positioning) produces outcomes comparable to the traditional ≥12-week delay: failure 5.1%, incontinence 7.7%, ED 56.4% — with no significant differences between early and delayed groups.[14]

Surgical technique — the progressive perineal approach (Webster / Ramon)​

The landmark technique described by Webster and Ramon (1991) in 74 patients established the sequential ancillary maneuver approach for achieving a tension-free bulboprostatic anastomosis, with a 96% success rate:[15]

Step 1 — Bulbar urethral mobilization. The bulbar urethra is mobilized from the perineal body to the penoscrotal junction. This alone provides 2–3 cm of additional length — sufficient for short distraction defects.

Step 2 — Corporal body separation (crural splitting). The corpora cavernosa are separated in the midline, allowing the urethra to pass between them, shortening the distance the urethra must traverse by straightening its course. Used in 17–36% of cases.[4][16]

Step 3 — Inferior pubectomy. Removal of the inferior margin of the pubic symphysis provides direct access to the prostatic apex and further shortens the distance. Used in 10–32% of cases.[4][16][17]

Step 4 — Supracrural urethral rerouting. The urethra is rerouted around one side of the corpora cavernosa (supracrurally). Reserved for the most complex, long-gap defects. Used in only 2–5% of cases. Associated with higher failure rates (75% recurrence in one series) and is now considered inferior to the abdominoperineal approach for salvage.[4][16][18]

Abdominoperineal (transpubic) approach​

Reserved for the most complex cases where a perineal approach alone is insufficient — typically defects >5 cm, significant lateral prostatic displacement, or failed prior perineal repair. Required in 5% of cases in the TURNS multicenter analysis. Koraitim reported a 97% success rate with the transpubic approach.[4][5][19]

A combined robotic transabdominal + open transperineal approach has been described for complex posterior urethral stenoses with 83.3% success and the ability to perform adjunctive procedures such as prostatectomy.[19]

Outcomes of Posterior Urethroplasty​

StudyYearnApproachSuccessFollow-upKey Findings
Koraitim[5]199578 (perineal) / 32 (transpubic)Perineal + transpubic95% / 97%17 yr experienceGold standard established; optical urethrotomy only 58%
Webster / Ramon[15]199174Elaborated perineal96%—Sequential ancillary maneuvers
Johnsen / TURNS[4]202012295% perineal, 5% abdominoperineal91% (no repeat intervention)—Angioembolization (p = 0.03) and defect length (p = 0.01) predict failure
Plamadeala / Lumen[20]202570Transecting (75.5%) + non-transecting EPA83.8% (10-yr RFS)median 130 moPostop complications (HR 4.85) and extravasation (HR 6.36) predict recurrence
Fu / Xu[17]2009301Perineal with sequential ancillary maneuvers87.4% overall—Simple perineal 89.3%; with pubectomy 84.2%; with rerouting 85.7%
Kizer / Brandes[16]2007142Simplified perineal92%>1 yrRerouting 75% failure; corporal splitting 17%; pubectomy 10%
Scarberry / Gómez[14]201839Perineal (early ≤6 wk vs delayed ≥12 wk)94.9%median 64 moNo difference early vs delayed; ED 56.4% (from trauma)

Functional Outcomes and Complications​

Erectile dysfunction​

ED is the most significant long-term morbidity of PFUI but is overwhelmingly caused by the original pelvic trauma, not the urethroplasty itself:[1][2][5][20]

  • ED rates after PFUI — 20–56% (varies by injury severity and series)
  • De novo ED from urethroplasty — only 2.5% in Koraitim's series[5]
  • In Plamadeala 2025, 97.9% of patients had impaired erectile function due to the trauma, with 12.2% improving after urethroplasty[20]
  • The ACS Best Practices Guidelines (2025) report ED rates of 20–35% after severe urethral injury[1]

MRI can predict erectile outcomes preoperatively: cavernous body avulsion and disruption of the neurovascular bundle on MRI correlate with clinical impotence.[8][9][21]

Urinary incontinence​

  • De novo incontinence after posterior urethroplasty — 6.6–15%[1][14][20]
  • ACS Best Practices Guidelines report incontinence rates of 15–20% after severe PFUI[1]
  • Continence after repair is reportedly adequate in most patients, though pelvic trauma can impair the external sphincter mechanism[2]
  • In complex cases requiring abdominoperineal approaches, incontinence rates are higher (33% in one series required artificial urinary sphincter)[19]

Stricture recurrence​

  • Overall recurrence after posterior urethroplasty — 5–16%[4][5][14][17][20]
  • Recurrence typically occurs early — median 3 months (IQR 2–5 mo)[20]
  • 10-year recurrence-free survival — 83.8%[20]

Independent predictors of failure​

  • Postoperative complications (HR 4.85, p = 0.007)[20]
  • Persistent urinary extravasation (HR 6.36, p = 0.006)[20]
  • Pelvic artery angioembolization (p = 0.03) — likely a marker of more severe pelvic vascular injury[4]
  • Longer distraction defects (p = 0.01)[4]
  • Prior failed endoscopic procedures may complicate subsequent urethroplasty[5]

Special Considerations​

Pediatric PFUI​

Children with PFUI present unique challenges due to ongoing growth. The same principles apply (SPT → delayed urethroplasty), but special attention must be paid to preserving growth potential and minimizing damage to the developing corpora cavernosa. Urethral rerouting around one side of the corpora cavernosum has been advocated for young patients to minimize secondary trauma to the erectile bodies.[18]

Female PFUI​

Female urethral injuries are rare and usually associated with pelvic fracture and concomitant vaginal laceration. Cystoscopy is recommended for evaluation, and a speculum exam should be performed to assess associated vaginal injuries.[1][6][7]

Associated injuries​

PFUI rarely occurs in isolation:[1][6]

  • Bladder injury — up to 20% of cases
  • Rectal injury — ~5% of cases (requires rectal and vaginal examination)
  • Vascular injury — 13% required pelvic artery embolization in the TURNS series[4]
  • Orthopedic injuries — multiple fractures, acetabular fractures, lower extremity injuries that may delay positioning for urethroplasty

Impact of prior endoscopic interventions​

The AUA Urethral Stricture Disease Guideline (2023) explicitly cautions against repeated endoscopic maneuvers: "Repeated endoscopic maneuvers including intermittent catheterization and blind 'cut to the light' procedures should be avoided since they are rarely successful." Koraitim warned that repeated urethrotomy of a long fibrous segment "would not only have a poor result but, by jeopardizing the elasticity of the anterior urethra, it also may undermine the chance for subsequent anastomotic urethroplasty."[5][13]

However, Kizer et al. found that early urethral realignment was associated with successful subsequent reconstruction in 100% (17/17) of patients in whom it was achieved, and the subsequent repair tended to be more straightforward.[16]

Management Algorithm​

PhaseActionKey Points
Acute (minutes–hours)Establish urinary drainageSPT preferred for complete PFUI; gentle single catheter attempt for incomplete; RUG before any manipulation[1][2][3]
Acute (days)Consider PEROnly if patient hemodynamically stable; no proven benefit over SPT for complete injuries; may benefit partial injuries[1][11][12]
Subacute (weeks–months)Stabilize associated injuriesOrthopedic fixation, soft-tissue healing; urology follow-up for ED / incontinence assessment[1]
Preoperative (3–6 mo)Imaging and planningCombined antegrade / retrograde urethrography + MRI; assess gap length, prostatic displacement, PUA[8][10]
Definitive repairDelayed perineal anastomotic urethroplastySequential ancillary maneuvers as needed; abdominoperineal approach for complex cases[15][16][19]
PostoperativeLong-term follow-upMonitor for recurrence (median 3 mo), ED management, incontinence assessment; consider AUS if needed[14][20]

Key Takeaways​

  • PFUI occurs in 1.5–10% of pelvic fractures, predominantly affecting young males, and results from distraction of the membranous urethra during pelvic ring disruption.
  • SPT placement is the preferred initial management; PER does not reduce obstruction rates for complete injuries (97% vs 94%, p = 0.471 in the TURNS prospective study).[11]
  • Delayed perineal anastomotic urethroplasty is the gold standard definitive treatment, achieving 84–97% success depending on series and follow-up.[4][5][15][20]
  • The Webster sequential ancillary maneuver approach (mobilization → corporal splitting → inferior pubectomy → rerouting) allows tension-free anastomosis for progressively longer defects.
  • ED is primarily caused by the pelvic trauma (20–56%), not the urethroplasty (de novo ED ~2.5%); MRI can predict erectile outcomes preoperatively.[1][5][8]
  • Angioembolization and longer distraction defects are independent predictors of surgical complexity and failure.[4]
  • Reconstruction timing of 3–6 weeks may be feasible in selected patients with stable injuries, without compromising outcomes compared to the traditional 3-month delay.[14]

References​

  1. Johnsen N, Wessells H, Archer-Arroyo K, et al. ACS TQP Best Practices Guidelines: Management of Genitourinary Injuries. American College of Surgeons; 2025.
  2. Horiguchi A. Management of male pelvic fracture urethral injuries: review and current topics. Int J Urol. 2019;26(6):596-607. doi:10.1111/iju.13947.
  3. Morey AF, Broghammer JA, Hollowell CMP, McKibben MJ, Souter L. Urotrauma guideline 2020: AUA guideline. J Urol. 2021;205(1):30-35. doi:10.1097/JU.0000000000001408.
  4. Johnsen NV, Moses RA, Elliott SP, et al. Multicenter analysis of posterior urethroplasty complexity and outcomes following pelvic fracture urethral injury. World J Urol. 2020;38(4):1073-1079. doi:10.1007/s00345-019-02824-5.
  5. Koraitim MM. The lessons of 145 posttraumatic posterior urethral strictures treated in 17 years. J Urol. 1995;153(1):63-6. doi:10.1097/00005392-199501000-00024.
  6. Coccolini F, Moore EE, Kluger Y, et al. Kidney and uro-trauma: WSES-AAST guidelines. World J Emerg Surg. 2019;14:54. doi:10.1186/s13017-019-0274-x.
  7. Expert Panel on Urological Imaging, Heller MT, Oto A, et al. ACR Appropriateness Criteria® penetrating trauma — lower abdomen and pelvis. J Am Coll Radiol. 2019;16(11S):S392-S398. doi:10.1016/j.jacr.2019.05.023.
  8. Horiguchi A, Edo H, Shinchi M, et al. Role of magnetic resonance imaging in the management of male pelvic fracture urethral injury. Int J Urol. 2022;29(9):919-929. doi:10.1111/iju.14779.
  9. da Silva Gaspar SR, Ferreira ND, Oliveira T, et al. Magnetic resonance imaging and pelvic fracture urethral injuries. Urology. 2017;110:9-15. doi:10.1016/j.urology.2017.06.041.
  10. Horiguchi A, Edo H, Soga S, et al. Pubourethral stump angle measured on preoperative magnetic resonance imaging predicts urethroplasty type for pelvic fracture urethral injury repair. Urology. 2018;112:198-204. doi:10.1016/j.urology.2017.09.038.
  11. McCormick BJ, Keihani S, Hagedorn J, et al. A multicenter prospective cohort study of endoscopic urethral realignment versus suprapubic cystostomy after complete pelvic fracture urethral injury. J Trauma Acute Care Surg. 2023;94(2):344-349. doi:10.1097/TA.0000000000003774.
  12. Owen K, Joe W, Palgunadi IN, Soebhali B. A systematic review and meta-analysis of surgical approaches in pelvic fracture-associated urethral injury: primary endoscopic realignment versus delayed urethroplasty. World J Urol. 2025;43(1):603. doi:10.1007/s00345-025-05994-7.
  13. Wessells H, Morey A, Souter L, Rahimi L, Vanni A. Urethral stricture disease guideline amendment (2023). J Urol. 2023;210(1):64-71. doi:10.1097/JU.0000000000003482.
  14. Scarberry K, Bonomo J, Gómez RG. Delayed posterior urethroplasty following pelvic fracture urethral injury: do we have to wait 3 months? Urology. 2018;116:193-197. doi:10.1016/j.urology.2018.01.018.
  15. Webster GD, Ramon J. Repair of pelvic fracture posterior urethral defects using an elaborated perineal approach: experience with 74 cases. J Urol. 1991;145(4):744-8. doi:10.1016/s0022-5347(17)38442-2.
  16. Kizer WS, Armenakas NA, Brandes SB, et al. Simplified reconstruction of posterior urethral disruption defects: limited role of supracrural rerouting. J Urol. 2007;177(4):1378-81; discussion 1381-2. doi:10.1016/j.juro.2006.11.036.
  17. Fu Q, Zhang J, Sa YL, Jin SB, Xu YM. Transperineal bulboprostatic anastomosis in patients with simple traumatic posterior urethral strictures: a retrospective study from a referral urethral center. Urology. 2009;74(5):1132-6. doi:10.1016/j.urology.2009.05.078.
  18. Li H, Jin C, Li S, et al. Urethral rerouting around one side of corpora cavernosus via a perineal approach for treating long-segment, complex posterior urethral strictures. World J Urol. 2025;43(1):485. doi:10.1007/s00345-025-05825-9.
  19. Cavallo JA, Vanni AJ, Dy GW, et al. Clinical outcomes of a combined robotic, transabdominal, and open transperineal approach for anastomotic posterior urethroplasty. J Endourol. 2021;35(9):1372-1377. doi:10.1089/end.2020.0973.
  20. Plamadeala N, Waterloos M, Waterschoot M, Lumen N. Posterior urethroplasty for pelvic fracture urethral injuries: risk factors for recurrence and complications. World J Urol. 2025;43(1):469. doi:10.1007/s00345-025-05839-3.
  21. Dixon CM, Hricak H, McAninch JW. Magnetic resonance imaging of traumatic posterior urethral defects and pelvic crush injuries. J Urol. 1992;148(4):1162-5. doi:10.1016/s0022-5347(17)36849-0.