Blood Test Information

Ammonia

minimum sample volume required ~ 4ml

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Test Code: AMM

Tube type: EDTA

Special instructions
Place sample into a bag of ice cubes and transport to lab immediately. State Date & Time on form.

Time limit for add on
Ammonia can not be added retrospectively due to instability.

Reference range
<4 weeks old: <100
>4 weeks old: <50

Contact Laboratory before requesting

Units
µmol/L

Turnaround Time
1 day

Department: Biochemistry

Clinical Application
Assessment of hepatic encephalopathy. Investigation of Inborn Errors of Metabolism: principally Urea Cycle disorders; secondary elevation seen in other disease eg. organic aciduris, fatty acid disorders. Drug interference information: Cefoxitin and Intralipid cause artificially high and low ammonia results respectively at the therapeutic drug level