title: The significance of a high plasma ammonia value.
abstract: At a tertiary referral centre, just over 50% of patients with plasma ammonia values over 200 micro mol/l had inborn errors of metabolism. To distinguish artefactual high values from those requiring treatment, the measurement should be repeated immediately if the result is above 200 micro mol/l and at lower concentrations if the patient is encephalopathic.
authors.affiliation: Metabolic Unit, Great Ormond Street Hospital, London WC1N 3JH, UK.
authors.forename: S L
authors.initials: SL
authors.lastname: Chow
authors.forename: V
authors.initials: V
authors.lastname: Gandhi
authors.forename: S
authors.initials: S
authors.lastname: Krywawych
authors.forename: P T
authors.initials: PT
authors.lastname: Clayton
authors.forename: J V
authors.initials: JV
authors.lastname: Leonard
authors.forename: A A M
authors.initials: AA
authors.lastname: Morris
mesh_terms: D000641:Ammonia / Q000097:blood*; D006801:Humans; D022124:Hyperammonemia / Q000097:blood / Q000209:etiology*; D013048:Specimen Handling / Q000379:methods
chemical_list: D000641:Ammonia