Test Code LAB4068 CREATININE W/GFR
Specimen Type
Preferred Sample: Lithium Heparin Plasma(Mint Green Top, Dark Green Top)
Alternate Sample: Serum (SST, Gold, Corvac, Tiger, Red Top Tube)
Specimen Volume
2 mL
Minimum Volume
0.2 mL
Turnaround Time
STAT: 1 hour
Routine: 4 hours
Test Schedule
Daily
Sample Stability
Room Temperature: 7 days
Refrigerated: 7 days
Frozen: 3 months
Method
Photometric
Reference Ranges
Creatinine mg/dL
| Age | Sex | Range |
| 0 up to 28 days | Female | 0.30 - 1.00 |
| 28 days up to 1 year | Female | 0.20 - 0.40 |
| 1 year up to 12 years | Female | 0.30 - 0.70 |
| 12 years up to 19 years | Female | 0.50 - 1.00 |
| 19 years and older | Female | 0.55 - 1.02 |
| 0 up to 28 days | Male | 0.30 - 1.00 |
| 28 days up to 1 year | Male | 0.20 - 0.40 |
| 1 year up to 12 years | Male | 0.30 - 0.70 |
| 12 years up to 19 years | Male | 0.50 - 1.00 |
| 19 years and older | Male | 0.73 - 1.18 |
Estimated Glomerular Filtration Rate mL/min/1.73m2
National Kidney Foundation (NKF) Guideline for Chronic Kidney Disease (CKD)with GFR Stages:
G1: ≥90 - NORMAL OR HIGH
G2: 60-89 - MILDLY DECREASED
G3a: 45-59 - MILDLY TO MODERATELY DECREASED
G3b: 30-44 - MODERATELY TO SEVERELY DECREASED
G4: 15-29 - SEVERELY DECREASED
G5: <15 - KIDNEY FAILURE
Abnormalities present for at least 3 months discriminate between chronic and acute disease.
Estimated GFR is calculated using the CKD-EPI equation.
Test Components
Creatinine, mg/dL;
Estimated Glomerular Filtration Rate, mL/min/1.73m2.
Synonyms
EGFR; GFR; Estimated Glomerular Filtration Rate; Glomerular Filtration Rate, Estimated
CPT Codes
82565
Rejection Criteria
Icteric specimens.