title: Flow resistance in tracheotomy tubes.
mesh_terms: D000403:Airway Resistance; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D011312:Pressure; D012137:Respiratory System / Q000503:physiopathology; D014132:Trachea / Q000502:physiology*; D014140:Tracheotomy