Proper management of renal artery injury from blunt trauma.

Blunt trauma to renal arteries often receives suboptimal management because of delayed diagnosis, incomplete preoperative evaluation, associated injuries, or unknown functional capacity of the contralateral kidney. We propose a rational treatment plan from an analysis of our three cases and a review of 118 cases. Two thirds of the patients were male, and left-sided injuries predominated over right 42.9% to 30.6%. In 20 cases the insult was bilateral. Associated injuries occurred in 72%, averaging 1.6 injuries per case, of which one half were intra-abdominal. Flank and/or abdominal pain was present in 73% of cases, tenderness in 65%, and gross or microscopic hematuria in 74%. Repairs were attempted on 38 renal arteries. "Successful" repairs were accomplished in 16 arteries, while repairs failed in 22. Subsequent hypertension developed in 32% of successes. Repair should be attempted in stable patients with unilateral injury of less than four hours' duration, bilateral injuries of less than 20 hours' duration, or injuries with nonocclusion on arteriogram.