title: [Correlation analysis of laryngeal vocal efficiency and nasalance after vertical hemilaryngectomy].
abstract: OBJECTIVE
  To analyse the correlation between laryngeal vocal efficiency and nasalance for patients after vertical hemilaryngectomy.
  
  
  METHODS
  The lately invented instruments, phono-laryngography and nasometer, which can objectively evaluate vocal function, were used to determine the laryngeal vocal efficiency and nasalance in 30 patients with laryngeal carcinoma treated primarily by vertical hemilaryngectomy.
  
  
  RESULTS
  The results showed that laryngeal vocal efficiency and nasalance have significant positive correlations in all subjects (r = 0.47).
  
  
  CONCLUSIONS
  Change of laryngeal vocal function influence the value of nasalance.
authors.affiliation: Department of Otorhinolaryngology, Union Hospital of Tongji Medical University, Wuhan 430022.
authors.forename: D B
authors.initials: DB
authors.lastname: Liu
authors.forename: S B
authors.initials: SB
authors.lastname: Bi
authors.forename: G P
authors.initials: GP
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007822:Laryngeal Neoplasms / Q000503:physiopathology* / Q000601:surgery; D007825:Laryngectomy / Q000379:methods* / Q000534:rehabilitation; D008297:Male; D008875:Middle Aged; D010699:Phonation; D014833:Voice Quality