“…There are some risks associated with nonoperative treatment, including delayed renal bleeding, delayed nephrectomy, urine leakage, urinoma, persistent fever, venous thromboembolism after prolonged immobilization, renal insufficiency, arteriovenous fistula, aneurysm, and even death. 8,9 Patients with renal injuries rated Grade 4 or higher have increased morbidity and mortality rates for conservative treatment. The incidence of functional renal loss and death occurred in 16% and 7% of patients with Grade 4 renal injuries, respectively.…”