title: [Significance of certain experiments relevant to airflow parameters in assessment of voice function].
abstract: OBJECTIVE
  To investigate the role of airflow parameters of some specific examinations in voice function assessment.
  
  
  METHODS
  The s/z ratio, pulmonary function and phonatory aerodynamic parameters were measured in subjects with benign vocal fold lesions and with normal voice. The effect of treatment in subjects with benign vocal fold lesions was evaluated with the phonatory aerodynamic parameters.
  
  
  RESULTS
  The value of s/z ratio in the disease group was higher than that in the normal group (P<0.05). The value of PEF was significantly different between the disease group and the normal group for male (P<0.05). MFR, MPT, PTF, SGP, PTP, VE were significantly different between the disease group and the normal group (P<0.05). MFR, MPT, PTF, SGP, PTP of the disease group after surgery for both sex were significantly different from before surgery (P<0.05). The disease group was subdivided into two groups through stroboscopic examination before and one month after surgery: the worse group (with some functional laryngeal abnormality, or organic abnormality except benign vocal fold lesion) and the better group. PTF, PTP, SGP, VE were significantly different between the worse group and the normal voice group. There was almost no significant difference for aerodynamic parameters between the better group and the normal voice group (P>0.05). There was no significant difference between the worse group after 8 weeks'voice training and the normal voice group (P>0.05).
  
  
  CONCLUSIONS
  s/z ratio, aerodynamic parameters (MFR, MPT, SGP, PTF, PTP, VE) are valuable for the diagnosis and assessment of the voice disorders. Aerodynamic parameters are sensitive to the change of glottal function during the treatment. Voice training can increase the glottal function of patients after laryngeal microsurgery.
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China.
authors.forename: Mingqiang
authors.initials: M
authors.lastname: Yu
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China.
authors.forename: Han
authors.initials: H
authors.lastname: Pan
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China.
authors.forename: Yanchao
authors.initials: Y
authors.lastname: Jiao
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China.
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Sun
authors.affiliation: Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361004, China; Email: peiyun_zhuang@yahoo.com.
authors.forename: Peiyun
authors.initials: P
authors.lastname: Zhuang
mesh_terms: D005260:Female; D006801:Humans; D007830:Larynx / Q000601:surgery; D008297:Male; D008866:Microsurgery; D010699:Phonation; D012119:Respiration; D014827:Vocal Cords / Q000503:physiopathology*; D014832:Voice Disorders / Q000601:surgery* / Q000628:therapy; D014834:Voice Training