Feasibility and normal values of an integrated conductivity (Nanoduct™) sweat test system in healthy newborns.

Background: Nanoduct™ is a simple and practical sweat analysis system measuring conductivity in situ. It requires only three microlitres of sweat, making it especially applicable to newborns.

Methods: We measured conductivity in 260 healthy term infants at the age of four days, and again at four weeks to determine the proportion of successful tests, test duration, and normal values for sweat conductivity in newborns.

Lethargy in a newborn: lithium toxicity or lab error?

Lithium medication during pregnancy is uncommon and the problems of a neonate who has been exposed to lithium represents a rare situation in neonatology. The clinical presentation and management of a newborn whose mother received lithium during pregnancy is presented. The newborn manifested a four day course of lethargy with unexplained high lithium levels in the adult toxic range.