AST
| Sunquest Code: | AST | ||
| Epic Code: | LAB131 | Epic 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 |
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| 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), 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) |
Interpretive
| Critical Range: | Initial results greater than 500 U/L
Range/Grand Itasca/St Johns/St Joseph/Woodwinds: N/A |
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| Reference Range: |
St Johns/St Joseph/Woodwinds: All ages: 0-40 U/L |
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| Use: | Evaluation of suspected hepatic disease. |
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