Test Name: Creatinine
Health Link Test Code: CRET
LIS Test Code: CRET
CPT Code(s): 82565
Creatinine and estimated Glomerular Filtration Rate (e-GFR)- calculated for adult outpatients
Included In: Basic Metabolic Panel, Comprehensive Metabolic Panel, and Creatinine Clearance Package
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: 1 hour.
Collection Container: Green cap with yellow ring (PST)
Also Acceptable: Green top, Red cap with yellow ring (SST), Red top
Collection Volume: 1 mL
Pediatric Collection Volume: 0.4 mL
Sample Analyzed: Plasma or serum
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.2 mL
Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
|0 days-1 month||0.30-0.90||0.30-0.90|
|2 months-2 years||0.15-0.40||0.15-0.40|
|3 years-6 years||0.25-0.50||0.25-0.50|
|7 years-10 years||0.30-0.65||0.30-0.65|
|11 years-14 years||0.40-0.80||0.40-0.80|
|15 years and up||
|18 years and up:||60-120 mL/min/1.73 sqm|
|e-GFR Interpretive Statement:|
|Chronic kidney disease:||e-GFR < 60 mL/min/1.73 sqm|
|Kidney failure:||e-GFR < 15 mL/min/1.73 sqm|
* For African-Americans multiply reported e-GFR result by 1.159.
Interpretation Type: Reference Interval
Very rarely unreliable results (i.e. pseudohypercreatininemia) secondary to occurrence of monoclonal protein have been described in patients affected by Waldenstrom's macroglobulinemia (only IgM type) or by monoclonal gammopathy of unknown significance (IgG or IgM).
Estimated Glomerular Filtration Rate calculation uses the CKD-EPI National Kidney Foundation calculation for IDMS creatinine methods. See the following website for this calculation: http://www.kidney.org/professionals