AAST Ureter Injury Scale
1.0.0Grades ureteral trauma from contusion through partial and complete transection to avulsion with long-segment devascularization per AAST OIS III.
Also searched as: urology · trauma · OIS · GU
Information
Incomplete input
- Please provide: injury grade.
How this tool works
The AAST ureter injury scale: Grade I contusion or hematoma without devascularization; Grade II laceration <50% transection; Grade III laceration ≥50% transection; Grade IV complete transection with <2 cm devascularization; Grade V avulsion with >2 cm devascularization. Advance one grade for multiple injuries up to grade III. Low-grade injuries may be managed with stenting or observation when extravasation is limited; higher-grade and devascularized injuries typically need surgical repair (ureteroureterostomy, reimplant, flap, or rarely diversion) with debridement to bleeding edges and tension-free anastomosis. Delayed diagnosis is common—look for urinoma, ascites, or persistent leak after penetrating or iatrogenic trauma.
References
- AAST Injury Scoring Scale (index)
- Moore EE et al. Organ injury scaling III. J Trauma 1992
- SurgicalCriticalCare.net — Injury severity scoring (ureter table)
Implemented from the cited published sources. Educational use only; confirm against current guidelines before clinical use.
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