Evaluate status of existing liver disease. Monitor treatment in patients with inborn errors of metabolism.
Within 24 hours
Green (sodium or lithium heparin). Collect on ice.
Separate plasma from cells and freeze within 15 minutes of draw time. Specimens need to be spun in a refrigerated centrifuge. Transfer 2 mL plasma to an ARUP Standard Transport Tube. (Min: 0.25 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Serum or blood. Non-frozen specimens. Specimens containing oxalate or citrate
After separation from cells: Ambient: Unacceptable; Refrigerated: 2 hours; Frozen: 3 weeks (do not thaw)
0-14 days: 95 µmol/L or less
15 days-6 years: 68 µmol/L or less
Greater than 6 years: 72 µmol/L or less
|Component Test Code*||Component Chart Name||LOINC|
- Plasma ammonia level