The Creatinine Clearance (24 Hour Urine and Serum) test calculates the amount of creatinine removed from the blood and passed through urine. The Creatinine Clearance test is often done to evaluate kidney or renal dysfunction. The Creatinine Clearance test may also be used to monitor kidney functions if taking certain medications. Turnaround time for the Creatinine Clearance (24 hour Urine and Serum) test is typically 1 business day.
The Creatinine Clearance (24-hour Urine and Serum) test is both a blood and urine collection. The blood test has no fasting requirements but is preferably collected at time the urine collection is completed. The Creatinine, 24-hour Urine test requires people void urine at 8am and discard the specimen. Then collect all urine in 24-hour period, ending with final collection at 8am the next morning.