Boretos, J W Decreased resistance to breathing through a polyurethane pediatric endotracheal tube. [electronic resource] - Anesthesia and analgesia - 292-6 p. digital Publication Type: Journal Article ISSN: 0003-2999 Subjects--Topical Terms: Airway ResistanceHumansInfant, NewbornInfant, Newborn, Diseases--therapyIntubation, Intratracheal--instrumentationPolyurethanesRespiratory Tract Diseases--therapy