In The Er Patient Received 2L Of IV Fluids, But

In the Er patient received 2L of IV fluids, but despite this his BUN was 40 mmol/L and creatinine was 200 μmol/L. His urine output was 15 cc/hr, despite being given fluid resuscitation. Foley catheter insitu. The endocrinologist, has placed patient on Humalog mixed pen insulin TID. how i can do the assessment or what i have to focus