[Hyperammoniemic encephalopathy: beyond the hepatic cause].

Hyperammoniemic encephalopathy is part of the differential -diagnosis in the presence of an acute confusional state. Although associated with liver dysfunction in the majority of cases, it can be observed in many other clinical situations. Often not investigated, the dosage of ammonium in the blood should be integrated in the biological work-up of encephalopathy of unknown origin.

[Evaluation of endogenous residual insulin secretion by C-peptide measurement].

C-peptide measurement allows an estimation of the residual endogenous insulin secretion in diabetic patients. Nowadays plasmatic testing is convenient and unexpensive, but we lack standardized tests. Therefore, there are no official recommendation regarding its use.