Outcome Evaluation
A comprehensive evaluation of the curative effect was carried out in all
cases one month after surgical operation. GRBAS (grade, roughness,
breathiness, asthenia, strain) is the scale of the Japan Society of
Logopedics and Phoniatrics, which gives a 4-point grading scale (0,
normal; 1, slight deviance; 2, moderate deviance; 3, severe deviance)
for perceptual analysis of voice. We used GRB as evaluation system to
rating the patient cases which were obtained preoperatively and
postoperatively.14 Videolaryngostroboscopy (VLS)
examination was performed preoperatively and postoperatively when the
patient sustained phonation of the vowel /i/. The main parameters
examined were including the degree of the vocal fold edge profile,
glottic closure, and mucosal wave. For each VLS parameter, a 4-point
grading scale mentioned above was used. According to the accumulated
points obtained after evaluation, each group was assigned into three
grading scale (0, normal; ≤2, slight deviance; ≥3,
deviance).15,16