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Ammonia

Plasma Ammonia Blood Ammonia
EDTA plasma (on ice, immediate analysis) µmol/L

About this test

By-product of amino acid metabolism, detoxified to urea in the liver. Elevated in hepatic encephalopathy and urea cycle defects.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 11 – 48 Adult; avoid haemolysis and delay in processing

Clinical Interpretation

High / Increased
Hepatic encephalopathy (liver failure, cirrhosis), urea cycle disorders, valproate toxicity, GI bleeding (in liver disease), portosystemic shunt.

Related Tests

Albumin Valproate Level
Specimen
EDTA plasma (on ice, immediate analysis)
Reporting Unit
µmol/L
Category
🧪 Clinical Biochemistry

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.