Includes: Creatinine (serum and urine), Creatinine Clearance (calculation).

Specimen(s): 10mL aliquot from a well-mixed, 24-hour urine collection and 1mL serum.

Record total volume, patient’s height and weight on specimen container and requisition. NOTE: A serum creatinine level must be collected within 24 hours of the beginning or ending of the urine collection.