Quantitative videostroboscopic measurement of glottal gap and vocal function: An analysis of thyroplasty type I

Koichi Omori, David H. Slavit, Ashutosh Kacker, Stanley M. Blaugrund

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

The goal of surgical medialization of the vocal fold is to attain complete glottic closure. The purpose of this study is to quantify the glottal gap and to examine the relationship between glottal gap and vocal function perioperatively in thyroplasty type I. Glottal gap area was measured in 20 patients at the point of maximum closure of vocal fold vibration in digitized laryngeal stroboscopic images and was normalized by the square of vocal fold length. Glottal gap area thus measured was correlated with results obtained from well-accepted acoustic, aerodynamic, and perceptual measures of vocal function. The glottal gap was significantly reduced after thyroplasty type I. In patients with small preoperative glottal gaps, the amplitude of vocal fold vibration was significantly improved. This study verifies that quantitative videostroboscopic measurement of the glottal gap is a useful means of objective evaluation of glottic incompetence and of the results of thyroplasty type I.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalAnnals of Otology, Rhinology and Laryngology
Volume105
Issue number4
DOIs
StatePublished - Apr 1996
Externally publishedYes

Keywords

  • glottal gap
  • quantitative measurement
  • thyroplasty type I
  • videostroboscopy
  • vocal function

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