title: Sonotubometry in children with otitis media with effusion before and after insertion of ventilation tubes.
abstract: OBJECTIVE
  To test the outcome of sonotubometric measurement in children with otitis media with effusion (OME) before and after insertion of ventilation tubes.
  
  
  METHODS
  Eustachian tube ventilatory function was tested in children with OME. To test validity, sonotubometric testing took place before insertion of ventilation tubes (ie, glue ear) and 1 week and 3 months after grommet insertion (ie, aerated middle ear cavity). One set of measurements consisted of 10 acts of swallowing. The outcomes of the tests were compared with those in otologically healthy controls.
  
  
  METHODS
  All testing took place during an outpatient clinic otorhinolaryngologic consultation in a city hospital.
  
  
  METHODS
  Thiry-three children with OME and 61 otologically healthy children (controls).
  
  
  METHODS
  Surgical grommet insertion.
  
  
  METHODS
  Sonotubometric measurements before and after insertion of ventilation tubes.
  
  
  RESULTS
  Fewer incidences of the opening of the eustachian tube were recorded in the measurements before insertion of ventilation tubes compared with after insertion. The number of incidences of opening recorded after insertion of ventilation tubes did not significantly differ from measurements in healthy controls.
  
  
  CONCLUSIONS
  Sonotubometric testing in children with OME reveals a low incidence of eustachian tube opening. Shortly after insertion of ventilation tubes, sonotubometry revealed no difference in eustachian tube ventilatory function compared with measurements in healthy controls. The low incidence of eustachian tube opening before grommet insertion may be attributable to decreased opening or dampening of the sound transmission by the middle ear fluid.
authors.affiliation: Department of Otorhinolaryngology, Nijmegen Medical Centre, Radboud University, Philips van Leydenlaan 15, PO Box 9101, 6500 HB Nijmegen, the Netherlands. s.vanderavoort@kno.umcn.nl
authors.forename: Stijn J C
authors.initials: SJ
authors.lastname: van der Avoort
authors.forename: Niels
authors.initials: N
authors.lastname: van Heerbeek
authors.forename: Gerhard A
authors.initials: GA
authors.lastname: Zielhuis
authors.forename: Cor W R J
authors.initials: CW
authors.lastname: Cremers
mesh_terms: D002648:Child; D005064:Eustachian Tube / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008876:Middle Ear Ventilation / Q000295:instrumentation; D010034:Otitis Media with Effusion / Q000503:physiopathology / Q000601:surgery*; D014463:Ultrasonography