Skip to content

AAST Ureter Injury Scale

1.0.0

Grades 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

AAST ureter grade
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

Implemented from the cited published sources. Educational use only; confirm against current guidelines before clinical use.