Transient Tachypnea of the Newborn (Neonatal Wet Lung Syndrome) By Arcangela Lattari Balest, MD, University of Pittsburgh, School of Medicine Reviewed / Revised Jul 2021 | Modified Sep 2022 View Patient Education Symptoms and Signs Diagnosis Treatment Transient tachypnea of the newborn is transient respiratory distress caused by delayed resorption of fetal lung fluid.