RESUMO
Background: Treatment for cancer using chemo-radiotherapy and radiotherapy are age old treatment procedures which are found to be efficient in eradicating cancerous cells thereby improving overall quality of life of the individual. Though they seem to improve the disease condition, they adversely affect different bodily systems and functions. One such effect is noted in literatures on regard of voice acoustics. Knowledge in voice acoustics in these participants would adequately provide management options before and after treatment. In our study we aim to estimate extend of voice changes in participants undergoing radiation therapy for non-laryngeal head and neck cancer. Methods: Multidimensional voice profile (MDVP) was used to assess voice parameters on three time basis such as pre-treatment, immediate post treatment and one month after post treatment. Results: Significant difference was seen between all the three time points namely; pre-treatment, post treatment and one month after post treatment were observed. Conclusion: The study revealed that, radiation therapy significantly affects the voice parameters in the same way as it affects other parts of the body. Though these effects seem to be of higher significance, during and immediate treatment; the recovery on late post treatment is satisfactory.
RESUMO
OBJECTIVES: Verbal communication depends on a good function of voice and speech organs. Some of the voice characteristics of deaf people differ considerably from those of speakers with normal hearing. After cochlear implantation (CI), auditory control of voice production is possible and the quality of the voice is improved. CI improves quality of voice, speech and hearing with deafness. The aim of our study was to investigate the relationship between acoustic analysis before CI and the speech intelligibility before and after CI. METHODS: Twelve prelingually deafened children implanted unilaterally at the age of 3.4-9 years were included in the study. For all of the children an acoustic analysis of the Slovene vowel 'a' was performed before CI. The fundamental frequency (F0), jitter, shimmer and noise-to-harmonic ratio (NHR) were studied before the implantation. For all of the children the speech intelligibility was performed before and 12 months after CI. Preoperative hearing was divided on existing residual hearing. The results of the acoustic analyses and speech intelligibility before and after CI were compared for preoperative hearing. The results of the speech intelligibility were compared for the age of operation and preoperative acoustic analysis (F0, jitter, shimmer, NHR). RESULTS: Preoperative hearing had no influence on preoperative voice analysis. The children with residual hearing had a high grade of speech intelligibility before and after CI. The preoperative shimmer had positive correlation with postoperative 12 month speech intelligibility (r=0.618, P=0.032). The preoperative jitter had positive correlation with postoperative 12 month speech intelligibility, but was not statistically significant (r=0.479, P=0.116). CONCLUSION: Shimmer on preoperative voice analyses had influence on speech intelligibility after CI.