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Trauma Updated 2026-04

Bladder and Urethral Trauma — Rupture Classification and CT Cystography

Bladder rupture classification (intraperitoneal vs extraperitoneal vs combined), CT cystography technique, urethral injury types I–V, retrograde urethrogram indications, and structured reporting checklist.

Quick summary

Bladder rupture classification, CT cystography, and urethral injury grading — with structured reporting checklists.

Bladder Rupture

Type Location Key Feature
Intraperitoneal Dome (weakest point) Contrast tracks along bowel loops, paracolic gutters — surgical repair
Extraperitoneal Anterolateral wall Contrast in perivesical space (flame-shaped); usually associated with pelvic fracture — catheter drainage often sufficient
Combined Both Surgical repair

Bladder Reporting Checklist

Urethral Injuries

Type Description
Type I Stretch / elongation, no extravasation
Type II Partial disruption above urogenital diaphragm (UGD)
Type III Complete disruption above UGD (most common posterior injury)
Type IV Bladder neck injury
Type V Partial / complete anterior urethral injury

Retrograde urethrogram is required to evaluate for urethral injury before catheter placement in pelvic fracture with blood at urethral meatus, perineal bruising, or inability to void.


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