title: Answer to the letter of Esquinas and Carlo.
authors.affiliation: Pediatric Intensive Care Unit, Department of Emergency and Intensive Care, University Hospital "A.Gemelli", Catholic University of the Sacred Heart, Rome, Italy.
authors.forename: Daniele
authors.initials: D
authors.lastname: De Luca
authors.forename: Marco
authors.initials: M
authors.lastname: Piastra
authors.forename: Domenico
authors.initials: D
authors.lastname: Pietrini
authors.forename: Giorgio
authors.initials: G
authors.lastname: Conti
mesh_terms: D057785:Catheters; D006612:High-Frequency Ventilation / Q000295:instrumentation*; D006801:Humans; D008954:Models, Biological; D063087:Noninvasive Ventilation / Q000295:instrumentation*