Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

CREATININE

General Information

Lab Order Codes:

CREA

Synonyms:

Creat

CPT Codes:

82565 - Creatinine, blood

Test Includes:

Creatinine concentration in reported in mg/dL.

Logistics

Test Indications:

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.

Lab Testing Sections:

Chemistry

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

4 hours

Special Instructions:

N/A

Specimen

Specimen Type:

Blood

Container:

Green top (Li Heparin) tube preferred
Alternate tube: Red top tube

Draw Volume:

0.6 mL blood

Processed Volume:

0.2 mL serum/plasma

Collection:

Routine venipuncture. Mix tubes containing anticoagulant by gentle inversion.

Special Processing:

Lab Staff: Centrifuge specimen, remove serum/plasma aliquot into plastic sample cup. Analyze sample immediately or store at refrigerated temperatures.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimen

Interpretive

Reference Range:

Males:

Age:

Range (mg/dL)

0 – 7 days:

0.58 – 1.09

8 days – 1 month:

0.18 – 0.68

1 month – 3 years:

0.18 – 0.48

3 – 5 years:

0.18 - 0.58

5 – 6 years:

0.28 - 0.58

6 – 8 years:

0.28 – 0.68

8 – 10 years:

0.28 – 0.78

12 – 14 years:

0.38 – 0.99

14 – 16 years:

0.48 – 1.09

16 – 18 years:

0.58 –1.19

≥18 years:

0.58 - 1.29

Females:

0 – 7 days:

0.58 – 1.09

8 days – 1 month:

0.18 - 0.68

2 – 5 years:

0.18 – 0.58

5 – 6 years:

0.28 – 0.58

6 – 9 years:

0.28 – 0.68

9 – 12 years:

0.28 – 0.78

12 – 15 years:

0.38 – 0.89

15 – 18 years:

0.38 – 0.99

≥18 years:

0.48 – 0.99

Critical Values:

N/A

Limitations:

N/A

Methodology:

Enzymatic, correlated to IDMS traceable

References:

EXCR Flex® reagent cartridge insert sheet PN 717270.003, issue date 2011-03-07 Rev.C

Clinical Significance, Dade Behring Inc., Glasgow Business Community, Mailbox 531, P.O. Box 6101, Newark, Delaware 19714

Jacobs & DeMott Laboratory Test Handbook (2001) Lexi-Comp, Inc, Hudson, OH, 5th Edition

Pediatric Reference Intervals, Sixth Edition, AACC Press, Washington DC, 2007

Biorad Liquichekÿ Unassayed Chemistry Control (Human) product insert, Irvine, CA

Biorad Liquichekÿ Urine Chemistry Control Product insert, Bio-Rad Laboratories, Irvine, CA 92618

Updates:

2/4/2013: Method update, previously listed as Alkaline Picrate/Kinetic. Note reference range changes.



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