Sunquest Code:AST  
Epic Code:LAB131Epic Name:AST
Order Instructions:AST can be falsely elevated if the platelet layer on top of the gel is disturbed. Re-centrifuge pre-processed tube received from an outside source, or if the tube is dropped.
Synonyms:Aspartate Aminotransferase; SGOT; Transaminase, LFT, Liver
Methodology:Bichromatic rate
St Johns/St Joseph/Woodwinds: NADH
Turnaround Time:Performed and reported 24 hours/day.

Collection Instructions

Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel), St Johns/St Joseph/Woodwinds-Green (lithium heparin, no gel) (Green (lithium heparin) on ICE, Red (no gel), Red or gold (gel), St Johns/St Joseph/Woodwinds - Red (no gel))
Causes for Rejection:Hemolysis.

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:Stability: Room temperature - 3 days; refrigerated - 7 days; frozen - 1 month.
Test Performed at or Referral Lab Chemistry  (University of Minnesota Health Maple Grove Clinics, Range, UMMC-East Bank, Oxboro Bloom, Lakes, Ridges, Northland, Southdale, UMMC/UMMCH-West Bank, M Health Clinic and Surgery Center, Grand Itasca, St. Joseph's, St. John's, Woodwinds)


Critical Range:Initial results greater than 500 U/L
Range/Grand Itasca/St Johns/St Joseph/Woodwinds:  N/A
Reference Range:
0-7 d 20-100 U/L
8-30 d 20-70 U/L
1-11 mo 20-65 U/L
1-2 y 0-60 U/L
3-11 y 0-50 U/L
12-19 y 0-35 U/L
20 y and older 0-45 U/L
 Grand Itasca: All ages 13-39 U/L
St Johns/St Joseph/Woodwinds: All ages: 0-40 U/L  
Use:Evaluation of suspected hepatic disease.

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