Voice Evaluation Between Carbon Dioxide Laser And Conventional Laryngeal Microsurgery For Vocal Cord Polyps

Objective:The aim of this study was to establish the clinical reference for th e curative effect of different type of laryngeal surgery by postoperative voice eva luation after CO2laser surgery and conventional laryngeal microsurgery for vocal cord polyps.Method:98patients with vocal cord polyps were divided into four groups.20people without laryngeal diseases were set as the control group. All the patients with vocal cord polyps were treated by CO2laser surgery or conventional laryn geal microsurgery. The curative effects were analyzed by voice evaluation.Result:1. Compare between preoperative and postoperative curative effects (4week s):There were significant differences between the preoperative and postoperative parameters of G, VHI-10, Jitter, Shimmer and HNR (P<0.01). There was no sign ificant difference between the parameters of Fo (P>0.05). The parameters of G, VHI-10, Jitter and Shimmer showed uptrends while the parameters HNR showed a downtrend.2. Compare between the surgical group and control group:There was no sig nificant difference between the preoperative and postoperative parameters of Fo (P>0.05). There were significant differences between the preoperative and postope rative parameters of G, VHI-10, Jitter and Shimmer (P<0.01). The parameters of Jitter Shimmer were higher than the control group, while the parameters of H NR were lower than the control group. There were no significant differences bet ween the postoperative parameters (4weeks) of Fo, Jitter, Shimmer, G and VHI-10(P>0.05). There were no significant differences between the postoperative par ameters (4weeks) of HNR of simple CO2group and simple conventional group (P>0.05), while there were significant differences between the parameters of HN R of complex CO2group and complex conventional group (P>0.05).3. Compare between preoperative parameters of simple groups and complex group, between postoperative parameters (4weeks) of simple groups and comple x group:(1) There were no significant differences between the postoperative para meters (4weeks) of Fo, Jitter, Shimmer, HNR, G and VHI-10of simple CO2gr oup and simple conventional group, was the same as the preoperative parameters (P>0.05). There was not too much difference between postoperative (4weeks) parameters of Jitter, Shimmer, HNR.(2) There were no significant differences be tween the postoperative parameters (4weeks) of Fo, Jitter, Shimmer, HNR, G an d VHI-10of complex CO2group and complex conventional group, was the same as the preoperative parameters (P>0.05). The parameters of Jitter, Shimmer of complex CO2group were lower than complex conventional group while the para meters of HNR of complex CO2group were higher than complex conventional g roup.Conclusion:1. CO2laser surgery and conventional laryngeal microsurgery for vocal polyp resection were the effective treatment for vocal cord polyps. The pronunciation qualities of the patients were significantly improved by the two types of surgery. There was not too much difference between the effects of two types of surgery.2. There was not too much difference between the postoperative results (4weeks) of the voice evaluation of simple CO2group and conventional group. There were curative effects in the treatments for simple type of vocal cord polyps by both of the two types of surgery, and the effects of the two types of surgery were similar.3. The postoperative (4weeks) results of the voice evaluation of complex CO2group were better than the postoperative (4weeks) results of complex conventional group, that is to say, the curative effects of CO2laser resection for the is better than the curative effects of conventional laryngeal microsurgery in treatment modalities polyps.