The nurse is caring for a patient who has an acute kidney injury. Which diagnostic test result should the nurse identify as most supporting this diagnosis?
a. Hematocrit 20% (normal 38% to 47%)
b. Uric acid 8 ng/dL (normal 2.5 to 5.5 ng/dL)
c. 24-hour creatinine clearance 5 mL/min (normal 100 mL/min)
d. Blood urea nitrogen 20 mg/100 mL (normal 8 to 25 mg/100 mL)
ANS: D
Of the tests listed a normal 24-hour creatinine clearance of 100 mL/min is the most accurate test for renal function. A value less than 100 mL/min indicates kidney disease. A. B. Hematocrit and uric acid levels are not used to diagnose kidney disease. D. Blood urea nitrogen test is also used to detect kidney disease however the value is within normal limits.
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