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Creatinine, Serum
MessageTest performed at York Hospital Laboratory.
Test Code
CREA
CPT Codes
82562
Includes
Creatinine, eGFR
Preferred Specimen
0.2 mL serum collected in a serum separator tube (SST)
Other Acceptable Specimens
0.2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: 5 days
Refrigerated: 30 days
Frozen: Indefinite
Refrigerated: 30 days
Frozen: Indefinite
Methodology
Spectrophotometry
Setup Schedule
Daily
Report Available
Next Day
Available STAT 1/2 Hour
Available STAT 1/2 Hour
Reference Range
Age | Creatinine (mg/dL) Male |
Creatinine (mg/dL) Female |
---|---|---|
<1 Week | 0.60 - 1.10 | 0.60 - 1.10 |
1-4 Weeks | 0.30 - 0.70 | 0.30 - 0.70 |
1-12 Months | 0.20 - 0.40 | 0.20 - 0.40 |
1-2 Years | 0.20 - 0.60 | 0.20 - 0.60 |
3 Years | 0.30 - 0.70 | 0.20 - 0.60 |
4 Years | 0.30 - 0.70 | 0.30 - 0.70 |
5 Years | 0.50 - 0.80 | 0.30 - 0.70 |
6-8 Years | 0.50 - 0.80 | 0.50 - 0.80 |
9 Years | 0.50 - 0.80 | 0.60 - 1.00 |
10-13 Years | 0.60 - 1.00 | 0.60 - 1.00 |
14-15 Years | 0.70 - 1.10 | 0.60 - 1.00 |
16-19 Years | 0.80 - 1.20 | 0.60 - 1.00 |
Adult | 0.66 - 1.25 | 0.52 - 1.04 |
The MDRD study equation has not been validated in children under 18 years and pregnant women. If patient is African-American, multiply reported result by 1.21.
Critical Values
> 5.0 mg/dL
Clinical Significance
Serum creatinine is useful in the evaluation of kidney function and in monitoring renal dialysis. A serum creatinine result within the reference range does not rule out renal function impairment: serum creatinine is not sensitive to early renal damage, since it varies with age, gender, and ethnic background. The impact of these variables can be reduced by an estimation of the glomerular filtration rate.