Does Voice Therapy after Endolaryngeal Microsurgery Contribute to the Treatment of Vocal Fold Polyp?

Introduction: The aim of this study was to assess the contribution of voice therapy (VT) to management of patients following surgery for vocal fold polyps. Methods: In this prospective study, two groups were created by randomizing patients diagnosed with vocal fold polyps. Group 1 received only phonosurgery, and group 2 received phonosurgery followed by VT. Subjective test methods conducted before and after treatment were evaluated comparatively. Videolaryngostroboscopy, the Voice Handicap Index-10 (VHI-10), and voice analysis parameters, including fundamental frequency variation (vF0), jitter percent (Jitt%), shimmer percent (Shim%), noise-to-harmonic ratio, and maximum phonation time (MPT), were compared before and after treatment. Results: The data of 40 patients, 15 (37.5%) women and 25 (62.5%) men, were examined in this study. Significant reductions were observed in the pre- and post-treatment values in the Voice Handicap Index-10 and GRBAS scale (p < 0.001). In terms of aerodynamic analysis, a decrease was observed in the S/Z ratio in both groups after treatment. Regarding MPT, a statistically significant increase was observed following treatment in (1) both groups (p < 0.001) and (2) group 2 versus group 1 (p < 0.001). In terms of acoustic voice analysis, both groups showed an increase in fundamental frequency (F0) and a statistically significant decrease in jitter and shimmer values. When comparing these parameter changes, it was observed that group 2 had a statistically significant difference compared to group 1 (F0: p = 0.082; Jitt: p = 0.014; Shim: p = 0.035, respectively). Conclusion: In this study comparing the outcomes of vocal fold polyp treatment using only surgery versus surgery combined with VT, it was found that the addition of VT to endolaryngeal phonosurgery provided a significant positive contribution.