Abstract:

Objective：To investigate the effect and method of maximum phonation time in diagnose of speech disorder by
theoretical exploration and case studies. Methods：A child with speech disorder who has been implanted artificial cochlear was followed up and evaluated by maximum phonation time，and the effect of maximum phonation time on respiratory function evaluation was studied. Results：Maximum phonation time can accurately reflect the change of respiratory function in speech disorder. Conclusions：Maximum phonation time which can sensitively reflect the patient's respiratory function is an effective clinical evaluation index.

Key words: maximum phonation time, speech barrier, respiratory disorder, clinical application