AST
Abbrev Code: | AST | ||
Order Code: | LAB131 | Order Name: | AST |
Synonyms: | Aspartate Aminotransferase; SGOT; Transaminase, LFT | ||
Methodology: | All Other Sites: Bichromatic rate
Roche: IFCC with pyridoxal phosphate activation St Johns/Woodwinds: NADH |
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CPT Codes: | 84450 x1, 84450 x1 | ||
Turnaround Time: | Performed and reported 24 hours/day. | ||
Associated Links: |
Collection Instructions
Specimen: | Blood |
Optimal Volume: | 2.5 mL |
Minimum\Peds Volume: | 0.6 mL |
Container: | Green (lithium heparin, gel), St Johns/Woodwinds-Green (lithium heparin, no gel) Alternate Containers: Red (no gel), Red or gold (gel), St Johns/Woodwinds - Red (no gel) |
Causes for Rejection: | Hemolysis. |
Processing and Shipping
Specimen Processing: | Centrifuge and aliquot within 2 hours of collection 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Note: 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. |
Shipping Instructions: | Ship at refrigerated temperature. |
Stability: | 7 days refrigerated; 3 months frozen |
Test Performed at or Referral Lab | Chemistry (CSC Maple Grove, CSC Mpls, Grand Itasca, Lakes, Northland, Oxboro Clinic, Range, Roche-Ridges, Roche-UMMC East, Southdale, St. John's, UMMC/UMMCH-West Bank, Woodwinds) |
Interpretive
Critical Range: | Hepatic Panel Critical Values and Reference Ranges |
Reference Range: | Hepatic Panel Critical Values and Reference Ranges |
Use: | Evaluation of suspected hepatic disease. |
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