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Creatinine - Blood

Source Blood
Mnemonic CREA
Specimen Requirements

1 x 3 mL or 4.5 mL light green (mint) top PST tube.  Gold top SST tube also acceptable.

0.2 mL plasma or serum

Minimum Whole Blood Volumes for Microcollections

Specimen Handling
Additional Information

Glomerular filtration rate (GFR) is the best indicator of kidney function and, in adults, can be easily and accurately estimated using the CKD-EPI GFR equation. This formula uses the patient's age and sex with the measured blood creatinine value to accurately estimate GFR, allowing patients with earlier stages of kidney disease to be identified.

Creatinine laboratory reports for all adult outpatients will include a report of GFR estimated by the CKD-EPI equation.

The calibration of the creatinine method used is IDMS-traceable. 

Testing Location Chemistry-All Sites
Rural: CRL
Testing Frequency Daily
Alternate Name(s)
Reference Interval

Age

Male & Unknown

Female

Units

Less than 2 years

10 - 40

10 - 40

umol/L

2 - 5 years

20 - 45

20 - 45

umol/L

6 - 12 years

20 - 75

20 - 75

umol/L

13 - 14 years

30 - 95

30 - 95

umol/L

15 - 150 years

50 - 120

40 - 100

umol/L