Objective To compare the effects on voice of endolaryngeal microsurgery(EMS)with cold instruments and a new method,"carbon dioxide laser(CO_(2)Laser)"for vocal fold polyps.Methods Twenty-five patients with v...Objective To compare the effects on voice of endolaryngeal microsurgery(EMS)with cold instruments and a new method,"carbon dioxide laser(CO_(2)Laser)"for vocal fold polyps.Methods Twenty-five patients with vocal fold polyps suffering from dysphonia who were treated in Macao Kiang Wu Hospital,Department of Otolaryngology Head and Neck Surgery were included in the study.Voice analysis was performed in a soundproof room,holding the microphone 15 cm away from the patients mouth and by recording a sustained[a,e,i,o,u]vowel for at least 5 seconds.Fundamental frequency(F0),Jitter and Shimmer parameters were evaluated in terms of vocal analysis.All patients were asked to fill in a questionnaire,to discuss the voice handicap index(VHI)after adequate explanation.EMS was performed with a carbon dioxide laser and cold knife on 15 and 10 patients,respectively.Patient follow-up was performed 1 week,2weeks and 4weeks after surgery.Changes in F0,Jitter and Shimmer values were measured and recorded.VHI was also completed and reassessed.Results Postoperatively,there was no significant difference in VHI scores between two groups(P>0.05).There was no significant difference in voice analysis values between two groups postoperatively,(P>0.05).Conclusion In the treatment of vocal polyps,EMS with both CO_(2)laser and traditional cold knife is effective.展开更多
In order to provide the basis for parameter selection of vocal diseases classification,a nonlinear dynamic modeling method is proposed.A biomechanical model of vocal cords with polyp or paralysis,which couples to glot...In order to provide the basis for parameter selection of vocal diseases classification,a nonlinear dynamic modeling method is proposed.A biomechanical model of vocal cords with polyp or paralysis,which couples to glottal airflow to produce laryngeal sound source,is introduced.And then the fundamental frequency and its perturbation parameters are solved.Poincare section and bifurcation diagram are applied to nonlinear analysis of model vibration.By changing the pathological parameters or subglottal pressure,the changes of fundamental frequency and Lyapunov exponents are analyzed.The simulation results show that,vocal cord paralysis reduces the fundamental frequency,and the chaos occurs only within a certain pressure range;while vocal cord with a polyp don＇t reduce the fundamental frequency,chaos distributes throughout the entire range of pressure.Therefore this study is helpful for classification of polyp and paralysis by the acoustic diagnoses.展开更多
文摘Objective To compare the effects on voice of endolaryngeal microsurgery(EMS)with cold instruments and a new method,"carbon dioxide laser(CO_(2)Laser)"for vocal fold polyps.Methods Twenty-five patients with vocal fold polyps suffering from dysphonia who were treated in Macao Kiang Wu Hospital,Department of Otolaryngology Head and Neck Surgery were included in the study.Voice analysis was performed in a soundproof room,holding the microphone 15 cm away from the patients mouth and by recording a sustained[a,e,i,o,u]vowel for at least 5 seconds.Fundamental frequency(F0),Jitter and Shimmer parameters were evaluated in terms of vocal analysis.All patients were asked to fill in a questionnaire,to discuss the voice handicap index(VHI)after adequate explanation.EMS was performed with a carbon dioxide laser and cold knife on 15 and 10 patients,respectively.Patient follow-up was performed 1 week,2weeks and 4weeks after surgery.Changes in F0,Jitter and Shimmer values were measured and recorded.VHI was also completed and reassessed.Results Postoperatively,there was no significant difference in VHI scores between two groups(P>0.05).There was no significant difference in voice analysis values between two groups postoperatively,(P>0.05).Conclusion In the treatment of vocal polyps,EMS with both CO_(2)laser and traditional cold knife is effective.
基金supported by the National Natural Science Foundation of China(61271359,61071215)the Biomedical Lab.of Jiemei in Soochow University
文摘In order to provide the basis for parameter selection of vocal diseases classification,a nonlinear dynamic modeling method is proposed.A biomechanical model of vocal cords with polyp or paralysis,which couples to glottal airflow to produce laryngeal sound source,is introduced.And then the fundamental frequency and its perturbation parameters are solved.Poincare section and bifurcation diagram are applied to nonlinear analysis of model vibration.By changing the pathological parameters or subglottal pressure,the changes of fundamental frequency and Lyapunov exponents are analyzed.The simulation results show that,vocal cord paralysis reduces the fundamental frequency,and the chaos occurs only within a certain pressure range;while vocal cord with a polyp don＇t reduce the fundamental frequency,chaos distributes throughout the entire range of pressure.Therefore this study is helpful for classification of polyp and paralysis by the acoustic diagnoses.
