Ammonia (NH3)

Also known as: NH3
Formal name: Ammonia, plasma
Related tests: Liver Panel, ALT, AST, ALP

• Why should I do it?

To help diagnose severe liver disease and certain genetic urea cycle disorders; to help investigate the cause of changes in behavior and consciousness; to support the diagnosis of hepatic encephalopathy and Reye’s syndrome

• When should I do it?

When someone experiences mental changes or lapses into a coma of unknown origin; when an infant or child experiences frequent vomiting and increased lethargy as a newborn or about a week after a viral illness

• What Kind of Sample is Needed?

A blood sample drawn from a vein in your arm

• Test Preparation Needed?

You should not smoke cigarettes prior to collection of the specimen.