The effect of Isshiki type 1 thyroplasty on quality of life and vocal performance.

Type 1 thyroplasty for unilateral vocal cord palsy improves many vocal outcome measures but there is little information on quality of life despite its increasingly recognized importance. Our prospective study examined its effect on a range of subjective and objective measures and quality of life. Twenty-seven patients underwent thyroplasty. Before and after surgery they completed a vocal performance questionnaire and the Nottingham Health Profile (NHP); instrumental analyses of jitter, shimmer and noise-harmonic ratio (NHR); and perceptual analyses of grade, roughness, breathiness, aesthenia and strain (GRBAS) were also performed. Significant improvements were found in instrumental, perceptual and self-assessment of voice and the energy, social and emotional dimensions of the NHP. Three patients had initially poor results but were successfully revised. These results of type 1 thyroplasty compare favourably with those previously published. The improvement in quality of life appears to result directly from improved voice. Many thyroplasty patients have limited life expectancy: early surgical intervention should be considered.