Ammonia

To detect an high levels of ammonia in the blood which may be due to liver disease, renal failure, or certain rare genetic urea cycle related disorders. To investigate causes of behavior changes and unconsciousness seen in hepatic encephalopathy or Reye syndrome.

When there are mental changes associated with liver disease or kidney failure. To investigate frequent vomiting, increased lethargy and unusual sleepiness in anew born or a child.