AST (AST)

Department: Chemistry
Test Synonym(s): LAB131, AST, Aspartate transaminase, SGOT
CPT Codes: 84450
Methodology: Kinetic Coupled Enzymatic Assay
Reference Range: CALIPER 0 to 14 days: 32 -162 U/L; 15 days to <1 yr: 20-67 U/L; 1 yr to <7 yrs: 21-44 U/L; 7 yrs to <12 yrs: 18-36 U/L; 12 yrs to < 19 yrs: 13-35 U/L; Abbott 19 to 150 yrs: 5-35 U/L (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 (Lithium Heparin with gel) tube
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: 4 days; Refrigerated: 7 days; Frozen: 12 weeks
Reasons for Rejection: Hemolysis, improper collection
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; Routine: 2 hours after receiving in lab

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