| Test Name: |
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Creatinine
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| Test Code(s): |
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CRET
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| CPT Code(s): |
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82565
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| Test Description: |
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Test Component: Creatinine and estimated Glomerular Filtration Rate (e-GFR)- calculated for adult outpatients
Included In: Basic Metabolic Panel, Comprehensive Metabolic Panel, and Creatinine Clearance Package
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| Methodology: |
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IDMS-traceable
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour.
Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Container: |
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Preferred: Green cap with yellow ring (PST)
Also Acceptable:
Green top,
Red cap with yellow ring (SST),
Red top
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| Collection Volume: |
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Preferred: 1 mL
Pediatrics: 0.4 mL
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| Sample Analyzed: |
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Plasma or serum
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| Volume Required: |
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Preferred: 0.5 mL
Pediatrics: 0.2 mL
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| Specimen Processing: |
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Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to the laboratory. Transport with coolant pack if coming from outreach location.
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| Stability: |
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Refrigerated: 4 days
Frozen: Indefinitely
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Interpretation
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Reference Interval:
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| Creatinine: |
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| Age |
Male
mg/dL
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Female
mg/dL |
| 0 days-1 month |
0.30-0.90 |
0.30-0.90 |
| 2 months-2 years |
0.15-0.40 |
0.15-0.40 |
| 3 years-6 years |
0.25-0.50 |
0.25-0.50 |
| 7 years-10 years |
0.30-0.65 |
0.30-0.65 |
| 11 years-14 years |
0.40-0.80 |
0.40-0.80 |
| 15 years and up |
0.70-1.20 |
0.55-1.05 |
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e-GFR*:
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| 18 years and up: |
60-120 mL/min/1.73 sqm |
| e-GFR Interpretive Statement: |
| Chronic kidney disease: |
e-GFR < 60 mL/min/1.73 sqm |
| Kidney failure: |
e-GFR < 15 mL/min/1.73 sqm |
* For African-Americans multiply reported e-GFR result by 1.210.
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| Additional Information: |
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Estimated Glomerular Filtration Rate calculation uses the MDRD National Kidney Foundation calculation for IDMS creatinine methods. See the following website for this calculation: http://www.kidney.org/professionals/kdoqi/gfr_calculator.cfm
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