title: The efficacy of dynamic slow motion video endoscopy as a test of eustachian tube function.
abstract: OBJECTIVE
  To assess the efficacy of dynamic slow motion video endoscopy as a test of eustachian tube function based on its correlation with the eustachian tube swallow test.
  
  
  METHODS
  The eustachian tube swallow test and dynamic slow motion video endoscopy were performed on 100 clinically normal middle ears of adults undergoing rigid nasal endoscopy for various indications. The dynamic slow motion video endoscopy findings were interpreted by three observers who were blind to the results of the eustachian tube swallow test, and the findings of both techniques were compared.
  
  
  RESULTS
  There was a statistically significant correlation between the dynamic slow motion video endoscopy and eustachian tube swallow test results for some of the more lenient criteria. Five of the 100 eustachian tubes had a floppy medial cartilaginous lamina which appeared to contribute to the eustachian tube dysfunction.
  
  
  CONCLUSIONS
  Dynamic slow motion video endoscopy appeared to over-diagnose eustachian tube dysfunction when used as a standalone test of eustachian tube function. However, when used in combination with other tests of eustachian tube function, it can provide valuable information regarding the structural and functional status of the pharyngeal end of the eustachian tube.
authors.affiliation: Department of ENT, Christian Medical College, Vellore, India. annmary@cmcvellore.ac.in
authors.forename: A M
authors.initials: AM
authors.lastname: Augustine
authors.forename: L
authors.initials: L
authors.lastname: Varghese
authors.forename: R C
authors.initials: RC
authors.lastname: Michael
authors.forename: R R
authors.initials: RR
authors.lastname: Albert
authors.forename: A
authors.initials: A
authors.lastname: Job
mesh_terms: D000158:Acoustic Impedance Tests; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003679:Deglutition / Q000502:physiology*; D004427:Ear Diseases / Q000175:diagnosis* / Q000503:physiopathology; D004432:Ear, Middle / Q000503:physiopathology; D004724:Endoscopy / Q000379:methods*; D005064:Eustachian Tube / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014741:Video Recording; D055815:Young Adult