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Creatinine
Test CodeLAB66
Alias/See Also
CREAT
Instructions
"Routine venipuncture Collect one 4.5ml light green top (heparin) tube Red/gold top serum separator tube "
Specimen Stability
"Refrigerate, stable 48 hours; stable 8 hours at room temperature; stable >48 hours if frozen. Send to the lab within 2 hours of collection"
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Insufficient quantity; gross hemolysis; failure to follow stability requirements
Methodology
Two point rate:The difference in reflection density is proportional to the concentration of creatinine present in the sample.
Setup Schedule
Daily
Report Available
Within 24 Hours
Reference Range
0-14 days: 0.14-0.92 mg/dL
15 days up to 2 years: 0.12-0.39 mg/dL
2 years up to 5 years: 0.17-0.45 mg/dL
5 years up to 12 years: 0.2-0.65 mg/dL
12 years up to 16 years: 0.34-0.88 mg/dL
Male 16 years and up: 0.66-1.25 mg/dL
Female 16 years and up: 0.52-1.04 mg/dL
Critical high value >7.4 mg/dL
15 days up to 2 years: 0.12-0.39 mg/dL
2 years up to 5 years: 0.17-0.45 mg/dL
5 years up to 12 years: 0.2-0.65 mg/dL
12 years up to 16 years: 0.34-0.88 mg/dL
Male 16 years and up: 0.66-1.25 mg/dL
Female 16 years and up: 0.52-1.04 mg/dL
Critical high value >7.4 mg/dL
Clinical Significance
Creatinine measurements are used in the diagnosis and treatment of renal diseases, in monitoring renal dialysis, and as a calculation basis for measuring other urine analytes.
