Ammonia, Plasma

CPT Code(s):

  • 82140

Preferred Specimen:

1 mL plasma, frozen

Minimum Volume:

0.5 mL

Transport Container:

Lavender top (EDTA) tube

Transport Temperature Name:

Freeze

Specimen Stability Components:

  • Room Temperature: Ammonia is stable for 1 day at -20C. Attention! Blood ammonia increases rapidly at room temperature.

Testing Schedule:

Daily

Methodology:

Enzymatic Glutamate Dehydrogenase

Reference Range:

16-53 umol/L

Reject Criteria:

Hemolysis, lipemia, specimen not received frozen, serum

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Genesis