The nurse is caring for a patient who has acute kidney injury. Which diagnostic test result would most support this diagnosis?
a. Blood urea nitrogen 20 mg/100 mL (normal 8 to 25 mg/100 mL)
b. 24-hour creatinine clearance 5 mL/min (normal 100 mL/min)
c. Uric acid 8 ng/dL (normal 2.5 to 5.5 ng/dL)
d. Hematocrit 20% (normal 38% to 47%)
ANS: B
A normal 24-hour creatinine clearance of 100 mL/min is the most accurate test for renal function, and a decrease indicates kidney disease.
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