Nanoduct Neonatal Sweat Analysis System for early laboratory diagnosis of cystic fibrosis. The Nanoduct System provides iontophoresis for 2 Ѕ minutes followed by continuous flow conductivity analysis on only 3 microliters of sweat. The Nanoduct System also provides the initial sweating rate. While Nanoduct is designed for neonates, it works equally well on patients of any age.