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Lab Dept:
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Chemistry
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Test Name:
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CREATININE
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General Information
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Lab Order Codes:
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CREA
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Synonyms:
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Creat
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CPT Codes:
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82565 - Creatinine, blood
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Test Includes:
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Creatinine concentration in reported in mg/dL.
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Logistics
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Test Indications:
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Creatinine produced as a by-product of muscle contraction, is fairly constant in the blood and is freely filtered by the glomerulus of the kidney. Useful in the evaluation of kidney function.
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Lab Testing Sections:
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Chemistry
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Phone Numbers:
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MIN Lab: 612-813-6280
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STP Lab: 651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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4 hours
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Blood
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Container:
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Green top (Li Heparin) tube preferred
Alternate tube: Red top tube
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Draw Volume:
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0.6 mL blood
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Processed Volume:
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0.2 mL serum/plasma
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Collection:
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Routine venipuncture. Mix tubes containing anticoagulant by gentle inversion.
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Special Processing:
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Lab Staff: Centrifuge specimen, remove serum/plasma aliquot into plastic sample cup. Analyze sample immediately or store at refrigerated temperatures.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimen
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Interpretive
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Reference Range:
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Males:
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Age:
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Range (mg/dL)
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0 – 7 days:
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0.58 – 1.09
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8 days – 1 month:
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0.18 – 0.68
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1 month – 3 years:
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0.18 – 0.48
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3 – 5 years:
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0.18 - 0.58
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5 – 6 years:
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0.28 - 0.58
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6 – 8 years:
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0.28 – 0.68
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8 – 10 years:
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0.28 – 0.78
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12 – 14 years:
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0.38 – 0.99
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14 – 16 years:
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0.48 – 1.09
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16 – 18 years:
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0.58 –1.19
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≥18 years:
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0.58 - 1.29
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Females:
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0 – 7 days:
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0.58 – 1.09
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8 days – 1 month:
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0.18 - 0.68
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2 – 5 years:
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0.18 – 0.58
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5 – 6 years:
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0.28 – 0.58
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6 – 9 years:
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0.28 – 0.68
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9 – 12 years:
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0.28 – 0.78
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12 – 15 years:
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0.38 – 0.89
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15 – 18 years:
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0.38 – 0.99
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≥18 years:
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0.48 – 0.99
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Enzymatic, correlated to IDMS traceable
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References:
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EXCR Flex® reagent cartridge insert sheet PN 717270.003, issue date 2011-03-07 Rev.C
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Clinical Significance, Dade Behring Inc., Glasgow Business Community, Mailbox 531, P.O. Box 6101, Newark, Delaware 19714
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Jacobs & DeMott Laboratory Test Handbook (2001) Lexi-Comp, Inc, Hudson, OH, 5th Edition
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Pediatric Reference Intervals, Sixth Edition, AACC Press, Washington DC, 2007
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Biorad Liquichekÿ Unassayed Chemistry Control (Human) product insert, Irvine, CA
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Biorad Liquichekÿ Urine Chemistry Control Product insert, Bio-Rad Laboratories, Irvine, CA 92618
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Updates:
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2/4/2013: Method update, previously listed as Alkaline Picrate/Kinetic. Note reference range changes.
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