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
Green Top Tube
(Lithium Heparin plasma separator tube with gel)
Alternate Specimen
Dried Blood collected on an AdvanceDx 100 card
Transport Temperature
Refrigerated (ship on frozen cold packs)
Stability
Refrigerated: 7 days
Lab Values
Creatinine
Female
| Age | Low | Normal | High |
| 0 – 4 yrs | Not Established | ||
| 5 – 9 yrs | <0.73 mg/dL | ≥0.73 mg/dL | |
| 10 – 12 yrs | <0.78 mg/dL | ≥0.78 mg/dL | |
| 13 – 15 yrs | <0.40 mg/dL | 0.40 – 1.00 mg/dL | >1.00 mg/dL |
| 16 – 17 yrs | <0.50 mg/dL | 0.50 – 0.95 mg/dL | >0.95 mg/dL |
| >17 | <0.51 mg/dL | 0.51 – 0.95 mg/dL | >0.95 mg/dL |
Male
| Age | Low | Normal | High |
| 0 – 4 yrs | Not Established | ||
| 5 – 9 yrs | <0.73 mg/dL | ≥0.73 mg/dL | |
| 10 – 12 yrs | <0.78 mg/dL | ≥0.78 mg/dL | |
| 13 – 15 yrs | <0.40 mg/dL | 0.40 – 1.05 mg/dL | >1.05 mg/dL |
| 16 – 17 yrs | <0.60 mg/dL | 0.60 – 1.17 mg/dL | >1.17 mg/dL |
| >17 | <0.67 mg/dL | 0.67 – 1.17 mg/dL | >1.17 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.
