|Downtime form:||A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery|
|Lavender top tube 3 mL (EDTA)|
2 days old to 30 days old: 56-92 μmol/L
1 month to 18 years: 21-50 μmol/L
Clinically significant: >150 μmol/L (<18 years old only)
Male: 16-60 μmol/L
Female: 11-51 μmol/L
Icterus: No interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL).
Hemolysis: No interference up to an H index of 100 (approximate hemoglobin concentration: 100 mg/dL).
Lipemia (Intralipid): No interference up to an L index of 700. There is poor correlation between turbidity and triglycerides concentration.
Therapeutic concentrations of the following drugs may lead to erroneous ammonia results: Cefoxitin (artificially high ammonia results), Intralipid (artificially high ammonia results), Sulfasalazine, and Temozolomide.
Updated to Roche Cobas Ammonia Generation II assay on 06/16/2020.
Specimens Requiring Immediate Delivery