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HelpTest Code LAB47 AMMONIA
Method
Colorimetric
CPT Code(s)
| Description | CPT Code |
| Ammonia | 82140 |
Specimen Information
| Container | Specimen | Temperature | Collect Vol | Submit Vol | Min Vol | Stability |
| Lithium Hep (green top) | Plasma | On Ice | 3 mL | 0.5 mL | 0.2 mL | 3 hrs |
| Lithium Hep (green top) | Plasma | Frozen | 3 mL | 0.5 mL | 0.2 mL | 24 hrs |
Plasma (lithium heparin) must be spun and separated from the cells within 15 minutes. Transport plasma to lab on ice. Test must be performed within 3 hours of collection. Any degree of hemolysis will cause rejection of specimen.
*** Heelstick draws and all Capillary Specimens are NOT acceptable for analysis ***
Instrumentation
Ortho Vitros 7600
Performing Location
University of Vermont Medical Center
Test Schedule / Analytical Time / Test Priority
Daily / 24 Hours / Available STAT
Section
Chemistry-1
Is the UVMMC lab NY State Certified to perform this testing? Yes/No
Yes
Reference Range
| Age | Sex | Low | High | Units |
| 0 - 1 month | All | <80 | µmol/L | |
| 1 month - 18 years | All | <50 | µmol/L | |
| ≥18 years | All | <34 | µmol/L |