Problem: The nurse is performing assessment on a client with acute kidney injury who is in the oliguric phase. Which should the nurse expect to note? Need Assignment Help? Select all that apply. 1. Increased serum creatinine level 2. A low and fixed specific gravity 3. Increased blood urea nitrogen (BUN) level 4. A urine output of 600 to 800 mL in a 24-hour period 5. Urine osmolarity of approximately 300 mOsm/kg (300 mmol/kg)