Axial CT Cystogram

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81 y/o male with abdominal pain s/p cystoscopy Edward Gillis, DO David Karimeddini, MD Axial CT Cystogram Axial CT Cystogram Axial CT Cystogram Coronal CT Cystogram ? Intra- and extraperitoneal bladder rupture Axial CT Cystogram: At the mid pelvis, contrast is seen extravasating into the left paracolic gutter, indicating an intraperitoneal component. Axial CT Cystogram: Lower down, perivesical contrast is seen. Foley catheter is present within the bladder. Axial CT Cystogram: Contrast extravasation localized around the right ureterovesical junction. Coronal CT Cystogram: Perivesical contrast around the dome of the bladder (blue arrow). Contrast is also demonstrated in the left paracolic gutter, indicating an intraperitoneal component (green arrow). Sagittal CT Cystogram: Defect in the bladder dome (yellow arrow) with perivesical contrast. Bladder Rupture Imaging Features • Intraperitoneal rupture – Contrast extravasates into the paracolic gutters and outlines loops of bowel. – Layering of contrast in dependent areas (Pouch of Douglas, Morrison’s Pouch) – Look for bladder dome defect • Extraperitoneal Rupture – Extravasation into extraperitoneal spaces, most commonly the retropubic space of Retzius – May see contrast extravasation into the anterior abdominal wall, thigh, and scrotum Bladder Rupture General Features • Extraperitoneal – 62% of all bladder ruptures – Usually secondary to pelvic fracture; fragment lacerates the base of the bladder. – Treatment is usually medical management with Abx and catheterization • Intraperitoneal – 25% of bladder ruptures – Trauma to abdomen with full bladder – May mimic acute renal failure – Treatment requires surgery to repair bladder dome • Combined – 12% of ruptures – Findings of both intraperitoneal and extraperitoneal ruptures References 1. Brant, W. E., & Helms, C. A. (2012). Fundamentals of diagnostic radiology. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins 2. Diagnostic Imaging for Radiology. (n.d.). Retrieved November, 4, 2017, from http://www.statdx.com/.

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