Following blunt abdominal trauma, CT shows a renal laceration extending more than 1 cm into the parenchyma without involvement of the collecting system, plus a segmental infarct without active bleeding. According to the AAST grading, this injury is:
- A Grade II
- B Grade IV ✓
- C Grade III
- D Grade V
Correct answer: B. Grade IV
Explanation
In the revised AAST renal injury scale, grade III is a laceration greater than 1 cm depth without urinary extravasation and no vascular injury. The presence of any vascular injury, including segmental arterial or venous injury with contained haematoma, upstages the injury to grade IV, as does a laceration involving the collecting system with urinary leak. Grade V denotes shattered kidney, main renal artery or vein injury, or avulsion of the hilum.
Reference: Bailey and Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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