title: Impact of adenotonsillectomy on vocal emission in children.
abstract: BACKGROUND
  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.
  
  
  OBJECTIVE
  To evaluate the impact of adenotonsillectomy in the voice emission pattern of children with hypertrophy of palatine and pharyngeal tonsils.
  
  
  METHODS
  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.
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  Transient changes in acoustic parameters occur in children with adenotonsillar hypertrophy submitted to adenotonsillectomy, progressing to normalization in the 3rd postoperative month.
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil. Electronic address: sdimatos@hotmail.com.
authors.forename: Spyros Cardoso
authors.initials: SC
authors.lastname: Dimatos
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
authors.forename: Luciano Rodrigues
authors.initials: LR
authors.lastname: Neves
authors.affiliation: Human Communication Disorders, Department of Speech Therapy, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
authors.forename: Jéssica Monique
authors.initials: JM
authors.lastname: Beltrame
authors.affiliation: Department of Speech Therapy, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
authors.forename: Renata Rangel
authors.initials: RR
authors.lastname: Azevedo
authors.affiliation: Department of Otolaryngology and Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
authors.forename: Shirley Shizue Nagata
authors.initials: SS
authors.lastname: Pignatari
mesh_terms: D000233:Adenoidectomy; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D006984:Hypertrophy / Q000601:surgery; D008297:Male; D014066:Palatine Tonsil / Q000473:pathology / Q000601:surgery*; D011184:Postoperative Period; D011446:Prospective Studies; D013061:Speech Acoustics; D014068:Tonsillectomy; D014833:Voice Quality
keywords: Adenoidectomia; Adenoidectomy; Palatine tonsil; Pharyngeal tonsil; Tonsila faríngea; Tonsila palatina; Tonsilectomia; Tonsillectomy; Voice; Voz