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A rupture of the membranous urethra, the section of the urethra located between the prostate and the spongy urethra, is a serious condition often caused by trauma, such as pelvic fractures. This injury can lead to the extravasation (leakage) of urine into surrounding tissues, which is known as "deep extravasation of urine." Here's an overview of the key aspects: Mechanism and Pathophysiology: The membranous urethra is supported by the pelvic diaphragm and is highly vulnerable to injury during severe trauma. Rupture results in disruption of the urethral continuity, causing urine to leak into deep pelvic tissues. Clinical Features: Inability to urinate (urinary retention). Perineal swelling, bruising, and tenderness. Extravasation may lead to urine accumulating in the deep perineal space and spreading to areas like the scrotum, lower abdomen, or thighs. Complications: Infection: Urine leakage can lead to cellulitis or abscess formation in soft tissues. Fibrosis or urethral stricture: Scar tissue may form during healing, potentially leading to narrowing of the urethra. Long-term issues with urinary continence or erectile dysfunction. Diagnosis: Retrograde urethrography (RUG): A contrast-based imaging technique to identify the location and extent of the rupture. Clinical assessment of symptoms and associated injuries, such as pelvic fractures. Management: Initial Care: Stabilization of the patient and urinary drainage through a suprapubic catheter to divert urine. Definitive Repair: Surgical intervention to repair the urethral injury, which may involve delayed reconstruction in complex cases. Management of complications like infection or strictures during follow-up. #urethra