What is the role of necrosis with urinary extravasation in the pathophysiology of ureteral injury?

Updated: Nov 12, 2020
  • Author: Sandip P Vasavada, MD; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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In complete unrecognized ligation of the ureter, a section of the ureteral wall necroses because of pressure-induced ischemia. The ischemic segment of the ureter eventually weakens, leading to urinary extravasation into the periureteral tissues. If the urinary extravasation drains into the adjacent peritoneum, urinary ascites may develop. If the urinary ascites is infected, peritonitis may ensue. If the peritoneum has remained closed, a urinoma may form in the retroperitoneum.

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