Test Code 1007
Test Details
Creatinine
Creatinine is the break-down product of creatine phosphate in muscle and is usually produced at a fairly constant rate. Creatinine is filtered by the kidneys and is not re-absorbed to any significant extent.
Methodology
Enzymatic
Patient Preparation
None
Preferred Specimen
1.0 mL serum (0.5 mL minimum) collected in serum separator tube (SST/Tiger Top)
Alternate Specimen
1.0 mL EDTA plasma (0.5 mL minimum) collected in plasma separator tube (Pearl Top)
Transport Temperature
Refrigerated (ship on frozen cold packs)
Stability
Refrigerated: 7 days
Lab Values
Creatinine
Male
- Low: <0.67
- Normal: 0.67-1.17 mg/dL
- High: >1.17 mg/dL
Female
- Low: <0.51
- Normal: 0.51-0.95 mg/dL
- High: >0.95 mg/dL
Clinical Significance
Creatinine
- Elevated levels of creatinine may indicate kidney dysfunction.
- Creatinine is used to evaluate renal function and in monitoring renal dialysis.
Treatment Options
Creatinine
- Treatment is based on cause of elevation.
- Consider additional diagnostic tests as indicated.
