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Creatinine, Serum
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    Creatinine, Serum

    Product Code: LCreaS

    Price: $52.00

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    Test Description

    Creatinine, Serum

    Creatinine is formed from muscle creatine. It is formed at a very specific rate and does not vary by more than 10% a day. The rate of formation is so constant it is used in the calculation of the glomerular filtration rate (GFR). Since creatinine is a waste product and is excreted by the kidneys, it is used (along with the BUN) as a test for kidney function. However, severe muscle wasting diseases (eg, rhabdomyolysis) may also cause an increase in the serum creatinine level. Elevated levels may also be found in obstruction of the urinary system and reduced renal blood flow.

    Test Details

    Process time: 5 to 7 business days

    Process method: The methodology is kinetic.

    CPT code: 82565

    Special instructions: None

    Rejection causes: Gross Hemolysis

    Collection Instructions

    Patient prep: None

    Specimen volume: 1 mL serum

    Minimum volume: 0.5 mL

    Collection container: SST or red-stopper tube

    Transport container: Plastic transport tube

    Transport instructions: Refrigerate or freeze

    Collection instructions: Click here for PDF


    Normal values: 0.5 to 1.5 mg/dL.


    Reference one: Bowers, C.D., Wong, E.T. Kinetic serum creatinine assays II: A critical evaluation and review. Clin Chem, 1980, 26(5):551-561.

    Reference two: Levey, A.S., Perrone, R.D., Madias, N.E. Serum creatinine and renal disease. Annu Rev Med, 1988, 39:465-490.

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