Within 24 hours
Plasma separator tube or serum separator tube. Also acceptable: Lavender (EDTA).
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)
Specimens obtained through catheters used to infuse hyperalimentation fluid. Specimens collected with potassium oxalate/sodium fluoride or sodium citrate.
Patient age and sex are required for calculation.
After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months
Effective August 20, 2018
Calculated GFR - >= 60 mL/min / 1.73 square meters
|0-30 days||0.50-1.20 mg/dL||0.50-0.90 mg/dL|
|31-364 days||0.40-0.70 mg/dL||0.40-0.60 mg/dL|
|1-3 years||0.40-0.70 mg/dL||0.40-0.70 mg/dL|
|4-6 years||0.50-0.80 mg/dL||0.50-0.80 mg/dL|
|7-9 years||0.30-0.60 mg/dL||0.30-0.70 mg/dL|
|10-11 years||0.30-0.70 mg/dL||0.40-0.80 mg/dL|
|12-13 years||0.40-0.80 mg/dL||0.40-0.80 mg/dL|
|14-15 years||0.40-1.10 mg/dL||0.30-0.90 mg/dL|
|16-18 years||0.60-1.20 mg/dL||0.50-1.00 mg/dL|
|19 years and older||0.40-1.20 mg/dL||0.40-1.20 mg/dL|
The CKD-EPI equation for non-African American individuals is used to calculate the estimated glomerular filtration rate (GFR). To estimate the GFR for African Americans, multiply the provided GFR result by 1.16.
The CKD-EPI equation is validated in individuals 18 years of age and older. It is less accurate in patients with extremes of muscle mass, restriction of dietary protein, ingestion of creatine, extra-renal metabolism of creatinine, or treatment with medications that affect renal tubular creatinine secretion.
|GFR Categories in Chronic Kidney Disease (CKD)|
||GFR (mL/min/1.73 square meters)
|G1||90 or greater||Normal or high*|
|G3a||45-59||Mild to moderate decrease|
|G3b||30-44||Moderate to severe decrease|
|G5||14 or less||Kidney failure|
|*In the absence of evidence of kidney damage, neither GFR category G1 nor G2 fulfill the criteria for CKD (Kidney Int Suppl 2013;3:1-150)|
|Component Test Code*||Component Chart Name||LOINC|
|0020025||Creatinine, Serum or Plasma||2160-0|
- Calculated Glomerular Filtration Rate
- Estimated Glomerular Filtration Rate