Creatinine Lvl (CRE)

Department: Chemistry
Test Synonym(s): LAB66, CRE, Creatinine Blood, eGFR, Creatinine Level
CPT Codes: 82565
Methodology: Kinetic Alkaline Picrate
Reference Range: 0-14 days: 0.42-1.05 mg/dL; 15 days-< 1 yr: 0.31-0.53 mg/dL; 1-< 4 yrs: 0.39-0.55 mg/dL; 4-< 7 yrs: 0.44-0.65 mg/dL; 7-< 12 yrs: 0.52-0.69 mg/dL; 12-< 15 yrs: 0.57-0.8 mg/dL; 15-< 17 yrs: 0.59-0.86 mg/dL (female), 0.65-1.04 mg/dL (male); 17-< 19 yrs: 0.60-0.88 mg/dL (female); 0.69-1.10 mg/dL (male); 19-150 yrs: 0.57-1.11 mg/dL (female), 0.72-1.25 mg/dL (male) (Pediatric Reference Ranges only verified for serum, see CALIPER Study in Colantonio DA, et.al Clin Chem 2012;58(5):854-868.)
Tube Type: Light green top PST (Lihtium Heparin with gel)
Specimen: Plasma
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 1 light green top microtainer
Volume: 1 mL plasma
Minimum Volume: 1 light green top
Temperature: Separate within 1 hour and store/ship @ ambient temperature until delivery.
Stability: Room temperature: 7 days; Refrigerated: 7 days; Frozen: 3 months
Reasons for Rejection: Hemolysis, imporper collection
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; ROUTINE: 2 hours after receiving in lab
Significance: Estimated glomerular filtration rate (eGFRcr) is calculated using the 2021 CKD-EPI equation.

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