title: Evaluation of the polytetrafluoroethylene-membrane ventilation tube.
mesh_terms: D000158:Acoustic Impedance Tests; D002648:Child; D002675:Child, Preschool; D005064:Eustachian Tube / Q000502:physiology; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007223:Infant; D007440:Intubation / Q000295:instrumentation*; D008297:Male; D011138:Polytetrafluoroethylene; D014432:Tympanic Membrane / Q000601:surgery*
chemical_list: D011138:Polytetrafluoroethylene