Ammonia AMN

Method(s) Spectrophotometry
Specimen Required
Collect

One full 3 mL prechilled green (sodium or lithium heparin) top tube.

Remarks Keep the collection tube chilled by placing it on ice before and after specimen collection.
Stability TRANSPORT SPECIMEN ON ICE AS SOON AS POSSIBLE; specimen must arrive at laboratory within 60 minutes after collection. Whole blood samples arriving at the laboratory more than 60 minutes after collection will be rejected. If the whole blood sample cannot be transported to the laboratory within 60 minutes, centrifuge sample and transfer plasma to a screw top, polypropylene transport tube. Freeze immediately and transport to the laboratory on dry ice. Once in the laboratory, specimen must be analyzed immediately or stored frozen. Stable 12 hours frozen.
Unacceptable Conditions

Whole blood specimens not transported on ice. Whole blood specimens received more than 60 minutes after collection. Frozen whole blood specimens.

Schedule Daily-24 hours per day
Billing Code 1010006
CPTCode 82140
Notes In the hospital setting, do NOT use the pneumatic tube system to deliver the specimen to the laboratory.
Preferred Specimen Collection Device(s)
Reference Interval

11-32 umol/L

No Appointment Necessary
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12 Patient Service Centers in Central New York.

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