| Synonyms:
| Ammonia, plasma |
| Specimen: | Blood; (1) Purple top (K2 EDTA) vacutainer tube. |
| Volume: | Full primary tube |
| Minimum Volume: | 100 microL plasma |
| Collection: | Vacutainer tube should be completely filled, placed on ice, and centrifuged immediately after collection.
If specimen cannot be analyzed within 30 minutes of collection, transfer plasma to a tightly capped plastic aliquot tube and freeze at -20°C for tra |
| Rejection Criteria: | Hemolysis; thawed specimen; improper labeling. |
| Reference Range: | 0-14 days= 56-107 micromol/L 15 days-11 years= 21-50 micromol/L Greater than 11 years= 11-32 micromol/L (manufacture) |
| Methodology: | Adaptation of the glutamate dehydrogenase (GLDH) enzymatic method of van Anken and Schiphorst. The substitution of NADPH for NADH eliminates interferences from other NADH-consuming reactions. |
| Test Use: | Ammonia levels are elevated in many conditions. A few examples are: liver disease, UTI with distention and stasis, Reye's Syndrome, and inborn errors of metabolism. |
| Additional Information: | |
| Testing Includes: | Ammonia level |
| Testing Facility: | AnMed Laboratory |