As prolonged intubation in new born babies, in particular premature babies, is becoming more and more frequent and laryngotracheal sequelae is having to be systematically researched, we employ an endoscopy with magnifying lenses being designed for an arthroscopy, in order to practice a precise laryngotracheoscopy, as soon and as less traumatic as possible for these small patients. The facility of employing this instrument has multified the indications.