NeoFent-I Study; Fentanyl Treatment in Newborn Infants; a Pharmacokinetic, Pharmacodynamic and Pharmacogenetic Study

"Bolus; Fentanyl (5 microgram/ml) 0,5 microgram/kg (0.1 ml/kg) is administered over 1 min starting 3-5 min before the lighter skin breaking procedure.~Fentanyl (5 microgram/ml) 2 microgram/kg is administered over 10 min before the start of the more painful procedur ( pleura drainage or tracheal intubation)."