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Test Code LAB1774 Ammonia, Plasma

Aliases

NH3
Plasma ammonia level

Performing Section

Chemistry

Specimen Type

Plasma:
Green Top – Li Heparin (Preferred)
Purple Top – EDTA

Specimen Volume

Preferred: 1.2 mL
Minimum: 0.6 mL

Processing Instructions

Spin down ASAP, keep sample on ice if delayed. Pipette off plasma into pour off tube and freeze.
Store and send sample Frozen on ice, STAT via courier.

TAT

15 minutes

CPT

82140

Special Collection Notes

No CAPILLARY COLLECTIONS- must be collected by venipuncture. Best to collect without tourniquet, if one is used, place lightly and collect specimen within 1 minute. Collect on ICE. Cannot share containers with any other test.

Additional Notes

Specimen will be rejected if hemolyzed.

Method

Vitros

Purpose/Principle

Quantitatively measure ammonia concentration in plasma.

Temperature

Frozen

Sample Stability

Ambient: Not recommended
Refrigerated: 3 hours
Frozen: 24 hours

Test/Batch Schedule

Daily

Test Components

Hemolysis Index
Icterus Index
Turbidity Index
Ammonia

Reference Range

Hemolysis Index

This component has no reference ranges

 

Icterus Index

This component has no reference ranges

 

Turbidity Index

This component has no reference ranges

 

Ammonia

0-up to1day: 64-107 mcmol/L

1 day-up to 14 days: 56-92 mcmol/L

14 days up to 18 years: 21-50 mcmol/L

18 years and older: 9-33 mcmol/L