Objective To analyze the voice parameters of chronic laryngitis,vocal nodule and vocal polyp,and to evaluate the significance of these parameters in the diagnosis of the involved disease.

ResultVocal nodule is the main cause to chronic hoarseness in children .

Vocal nodule was the major cause of chronic hoarseness in children.

Objective To evaluate the efficacy of Jinsang Sanjie Pill integrative therapy for vocal polypus and vocal nodules.

The author of Vocal Arts Institute in the learning process, students witnessed the voice caused due to various reasons, the pain caused by fatigue, Once the voice did not alleviate the fatigue and long-term development, it is bound to lose their luster voice, caused by vocal cord polyps, vocal nodules or laryngeal muscle weak voice disease and so forth.

Methods:55 patients(23 cases of male unilateral vocal fold polyps,9 cases of female unilateral vocal fold polyps,6 cases of male bilateral vocal fold polyps,8 cases of female bilateral vocal fold polyp and 9 cases of female bilateral vocal nodules) undergo microlaryngoscopic surgery.

Clinical and pathological analysis of colic polyp in children;

During overhaul of the set,the last stage blade was reconstructed to the structure with shroud,which thoroughly solved the breaking issue of the shroud band and improved running safety and economy of the set.