AST


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
CPT Code:84450
Turnaround Time:Performed and reported 24 hours/day.


Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel) (Green (lithium heparin) on ICE, Red (no gel), Red or gold (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.
Test Performed at or Referral Lab Chemistry  (University of Minnesota Health Maple Grove Clinics, Fairview Range - FRMC, UMMC-East Bank, Oxboro Bloom, Fairview Lakes - FLMC, Fairview Ridges - FRH, Fairview Northland - FNMC, Fairview Southdale - FSH, UMMC/UMMCH-West Bank, M Health Clinic and Surgery Center, Grand Itasca GICH)


Interpretive

Critical Range:Initial results greater than 500 U/L
Reference Range:
 
Age  
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
 GICH: All ages 13-39 U/L  
Use:Evaluation of suspected hepatic disease.


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