Hyperammonaemia

Causes	Appropriate Tests
	Ammonium.
Neonatal and paediatric
Transient neonatal hyperammonaemia
Urea cycle defects Ornithine transcarbamylase deficiency	Amino acids - urine (orotic acid).
Lysinuric protein intolerance	Amino acids - urine.
Reye syndrome
Organic acidaemias
Hepatic failure
Adult
Hepatic failure
Portosystemic shunts
Urea cycle defects, especially Mild variants of paediatric forms Type ll citrullinamaemia	Amino acids - urine (orotic acid).

Glossary Terms