Protocol Based-furosemide Stress Test Versus Standard Care to Evaluate Renal Recovery During Continuous Renal Replacement Therapy

After taking furosemide at 1.5 mg/kg intravenously, if the urine output exceeds 200 mL within 2 hours, the patients are going to withhold CRRT. But if there is no response, the titration of furosemide to 2.5 mg/kg and 3.5 mg/kg every 6 hours is scheduled according to the urine output \>200 mL in 2 hours (not exceeding 250 mg).