CO_(2)激光輔助的聲帶息肉激光切除術與傳統喉顯微器械手術術後嗓音分析及嗓音障礙指數分析

Comparison of effects on voice of carbon dioxide laser and cold knife microlaryngology techniques for vocal fold polyps in VHI and voice analysis

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.