Suggest Treatment For Crushing Blows On Lower Back After Being Trampled By Horse

A man was admitted to the hospital after being trampled by his horse. He received crushing blows to his lower back, on both sides. He is in considerable pain, and his chart shows a urine output of 70 ml. in the last 24 hours.. What is the specific symptom called? What will be required if the renal effects of his trauma persist?