Observation of Vocal Polyps Treated with CO_2 Laser and Laryngeal Microsurgery / 听力学及言语疾病杂志

ABSTRACT

Objective The present study aimed at the effect observation of vocal polyps treated with CO2 laser and laryngeal microsurgery. Methods The subjects were 60 patients, 30 were treated by CO2 laser and 30 by laryngeal microsurgery. A set of tests had been routinely used for vocal polyp patients in this study. The tests included(1) indirect laryngoscopic examination,(2)voice analysis: PPQ(pitch perturbation quotient), APQ(amplitude perturbation quotient), H/N(harmonics to noise ratio).(3)psychoacoustic evaluation GRBAS method: Grade(G), Rough(R), Breathy(B), Asthenic(A), Strained(S). Results After operation, the recovery time of vocal cord for CO2 laser treated group was longer than that in the laryngeal microsurgery group. The acoustic parameters PPQ for CO2 laser group were larger than that in the laryngeal microsurgery group, moreover H/N values were smaller than that in laryngeal microsurgery group. The psychoacoustic evaluation for CO2 laser group was rough and strained, and for laryngeal microsurgery group was only rough. Conclusion The curative effect of laryngeal microsurgery is definite. Microsurgery is better than CO2 laser when recovery time and vocal function improvement are considered.