The Effects of Voice Training Therapy on Dysphonia in Patients with Vocal Nodules / 听力学及言语疾病杂志

ABSTRACT

Objective To investigate the effect of voice training therapy on the voice improvement in patients with vocal nodules .Methods Twenty one patients with vocal nodules were recruited and were evaluated by the GRBAS perpetual evaluation ,voice handicap index (VHI)-30 subjective assessment ,vocal laryngostroboscopy , maximum phonation time (MPT) and acoustic analysis pre- and post-therapy .These patients completed 5 cour‐ses of voice training .Results The VHI value(29 .48 ± 21 .21) of post-therapy was less than the value (52 .95 ± 24 . 30)of pre -therapy (P< 0 .01) .There were significantly differences in voice perpetual evaluation between pre -training and post-training ,especially for G (grade) (P<0 .01) and R (roughness) (P<0 .01) .The post-training laryngostrobescopy vocal vibration improved comparing with pre-therapy in the closure of vocal cords ,symmetry of vibration ,the mucosal wave and vibration regularity of the vocal cords .After therapy ,three patient nodules dis‐appeared ,thirteen patient nodules became smaller ,and five patient nodules remained the same .The maximum pho‐nation time (MPT) (12 .54 ± 3 .68)of post-therapy was longer than MPT(8 .87 ± 3 .75) of pre-therapy MPT(P<0 .01) .The jitter value (0 .18% ± 0 .08% ) of post -therapy was less than that of pre-therapy(0 .43% ± 0 .31% ) (P<0 .01) .The shimmer of post -therapy (2 .10% ± 0 .98% ) was less than that of pre -therapy (4 .55% ± 1 .80% )(P<0 .01) ,The ratio of noise to harmonic(NHR)(0 .0034 ± 0 .0022 dB) of post-therapy was significantly less than NHR(0 .0184 ± 0 .028 dB)(P<0 .05) of pre-therapy .Conclusion The voice therapy could significantlyimprove voice of patients with vocal nodules .