[Value of nasopharyngofiberoscope, spectrography and computer in diagnosis and treatment of pathologic speech after cleft palate operation].

The speech of 45 cases with velopharyngeal incompetence (VPI) were evaluated by combining application of nasopharyngofiberoscope (NPF) and computer-spectrographic analysis system (CSAS) after cleft palate operation and conservative speech therapy with using cleft palate obturators. The results showed: Improving rate of velopharyngeal incompetence (IRVPI) was close to 33.33% after 2.5-3 years therapy. The spectrographic analysis showed a clearer, and darken frequency band, normal resonance peaks (F2,F3) and seldom appearance of negative value of voice origination time (VOT). The above indicated that patients had achieved adequate velopharyngeal competence (VPC) and good speech habit. It has important significances and greatly improve speech therapy level to apply NPF and CSAS to analysing pathologic speech and evaluating therapic effect.