PT - JOURNAL ARTICLE AU - S L Chow AU - V Gandhi AU - S Krywawych AU - P T Clayton AU - J V Leonard AU - A A M Morris TI - The significance of a high plasma ammonia value AID - 10.1136/adc.2003.036236 DP - 2004 Jun 01 TA - Archives of Disease in Childhood PG - 585--586 VI - 89 IP - 6 4099 - http://adc.bmj.com/content/89/6/585.short 4100 - http://adc.bmj.com/content/89/6/585.full SO - Arch Dis Child2004 Jun 01; 89 AB - At a tertiary referral centre, just over 50% of patients with plasma ammonia values over 200 μmol/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 μmol/l and at lower concentrations if the patient is encephalopathic.