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Impact of adenotonsillectomy on vocal emission in children Please cite this article as: Dimatos SC, Neves LR, Beltrame JM, Azevedo RR, Pignatari SSN. Impact of adenotonsillectomy on vocal emission in children. Braz J Otorhinolaryngol. 2016;82: 151-8. ☆☆ ☆☆ Institution: Department of Otolaryngology and Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.

Spyros Cardoso Dimatos Luciano Rodrigues Neves Jéssica Monique Beltrame Renata Rangel Azevedo Shirley Shizue Nagata Pignatari About the authors



Adenotonsillectomy is the most common surgery performed by otolaryngologists in pediatric age, and one of the most frequently asked questions about the postoperative period is whether there is a potential for change in vocal pattern of these children.


To evaluate the impact of adenotonsillectomy in the voice emission pattern of children with hypertrophy of palatine and pharyngeal tonsils.


This is a prospective study in which we carried out perceptual auditory assessments and acoustic analysis of 26 children with adenotonsillar hypertrophy at three time points: before surgery, one month and three months after surgery. The following acoustic parameters were estimated using the Praat software: fundamental frequency, jitter, shimmer, and harmonic-noise ratio.


A statistically significant change was found between shimmer and harmonic-noise ratio during vowel /u/ production between the preoperative and 1st month postoperative time points. No significant differences were detected for acoustic parameters between preoperative analysis and that of the 3rd month post-operation.


Transient changes in acoustic parameters occur in children with adenotonsillar hypertrophy submitted to adenotonsillectomy, progressing to normalization in the 3rd postoperative month.

Voice; Tonsillectomy; Adenoidectomy; Pharyngeal tonsil; Palatine tonsil

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