title: [The exploration of TTAG method in determinating the states of eustachian tube function of healthy group].
abstract: OBJECTIVE
  To explore the feasibility and validity of tubo-tymanoaerodynamicgraphy (TTAG) determinating the Eustachian tube function of health adult group.
  
  
  METHODS
  The ventilation function of Eustachian tube was measured by the TTAG method in health adult group (132 ears), the results and the graphs were also analyzed.
  
  
  RESULTS
  The positive rate in health adult group using Valsalva method was 93.93% (124/132). The positive ears were divided into type I and type II, the mean value of nasopharynx press of type I and II has no significant differences (P>0.05), but the mean value of external auditory canal press had significant differences (P<0.01).
  
  
  CONCLUSIONS
  TTAG method has the clinical value in determinating the states of Eustachian tube function of health group.
authors.affiliation: School of Medicine, Huangshi Institute of Technology, Huangshi, 435003, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhan
authors.forename: Songhua
authors.initials: S
authors.lastname: Tan
authors.forename: Anzhou
authors.initials: A
authors.lastname: Tang
mesh_terms: D000158:Acoustic Impedance Tests / Q000379:methods*; D000293:Adolescent; D000328:Adult; D004424:Ear Canal / Q000502:physiology; D005064:Eustachian Tube / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D055815:Young Adult