Acoustical Effects of Endotracheal Intubation

Author:

Yonick Tracey A.1,Reich Alan R.1,Minifie Fred D.1,Fink B. Raymond2

Affiliation:

1. University of Washington, Seattle

2. Department of Anesthesiology, University of Washington, Seattle

Abstract

Certain acoustical consequences of endotracheal intubation were examined in 13 male cardiovascular-surgery patients. Each subject recorded three tokens of a sustained vowel 1 day before intubation, 1 day after, upon discharge, and during a follow-up visit. Eight acoustical measures were obtained from the audio-recorded vowels: (a) mean fundamental frequency (Fo), (b) Fostandard deviation, (c) Foperturbation quotient, (d) mean sound pressure level (SPL), (e) SPL standard deviation, (f) SPL perturbation quotient, (g) spectral flatness of the residue signal, and (h) coefficient of excess. Mean Fo, Fostandard deviation, mean SPL, SPL standard deviation, and coefficient of excess did not differ significantly across recording sessions, although certain predictable trends were apparent. Foperturbation quotient, SPL perturbation quotient, and spectral flatness of the residue signal varied significantly across sessions, implying that these acoustical measures may be useful in the identification and monitoring of even minor intubation-related laryngeal trauma.

Publisher

American Speech Language Hearing Association

Subject

Otorhinolaryngology

Reference50 articles.

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5. Laryngeal effects of prolonged intubation;BISHOP M. J.;Anesthesia and Analgesia,1984

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