, Volume 24, Issue 7, pp 691-695

Plasma glutamine and ammonia concentrations in ornithine carbamoyltransferase deficiency and citrullinaemia

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Abstract

A retrospective review of the plasma ammonia and glutamine concentrations during the long-term management of 7 patients with ornithine carbamoyltransferase (OCT) deficiency and three with citrullinaemia is presented. The relationship between the plasma concentrations of ammonia and glutamine is not a simple linear one and there are significant differences between the two disorders. Patients with citrullinaemia tend to have higher plasma ammonia concentrations for a given plasma glutamine concentration compared to those with OCT deficiency. The possible reasons for these differences and the implications for management are discussed.