PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 2122385

The adjustable supraglottiscope.

S M Zeitels·C W Vaughan
View original source ↗Export metadata ↓

Abstract

Transoral surgery in the supraglottic larynx is facilitated by the use of a new instrument, an adjustable supraglottiscope. Conventional adjustable laryngoscopes are not designed for supraglottic surgery and are therefore difficult to use in this area. The adjustable supraglottiscope: (1) provides wide exposure of the supraglottis and much of the lower pharynx, (2) allows instruments to be introduced from the side (between the blades), (3) allows for true suspension, and (4) retracts the endotracheal tube out of the way. These factors provide greater visualization and control of the surgical field and thus improve hemostasis and precision. The adjustable supraglottiscope has been used successfully in a variety of clinical situations. Transoral supraglottic surgery now takes considerably less time and is done with much greater ease. The adjustable supraglottiscope is a valuable instrument in our armamentarium and extends our versatility for endoscopic management of lesions of the supraglottic larynx and lower pharynx.

Explore related subjects

GlottisHumansLaryngoscopesLaryngoscopyJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

S M Zeitels, C W Vaughan. 1990. The adjustable supraglottiscope.. https://doi.org/10.1177/019459989010300326

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1992

Vocal intensity in speakers and singers.

Vocal intensity is studied as a function of fundamental frequency and lung pressure. A combination of analytical and empirical models is used to predict sound pressure levels from glottal waveforms of five professional tenors and twenty five normal control subjects. The glottal waveforms were obtained by inverse filtering the mouth flow. Empirical models describe features of the glottal flow waveform (peak flow, peak flow derivative, open quotient, and speed quotient) in terms of lung pressure and phonation threshold pressure, a key variable that incorporates the Fo dependence of many of the features of the glottal flow. The analytical model describes the contributions to sound pressure levels SPL by the vocal tract. Results show that SPL increases with Fo at a rate of 8-9 dB/octave provided that lung pressure is raised proportional to phonation threshold pressure. The SPL also increases at a rate of 8-9 dB per doubling of excess pressure over threshold, a new quantity that assumes considerable importance in vocal intensity calculations. For the same excess pressure over threshold, the professional tenors produced 10-12 dB greater intensity than the male nonsingers, primarily because their peak airflow was much higher for the same pressure. A simple set of rules is devised for predicting SPL from source waveforms.

Glottis↗
PubMed1992

About the mechanism of hiccup.

Every new empiric observation made over two millenia fueled the dispute as to whether hiccup (Hc) is a digestive or a respiratory reflex. A review of the literature, focusing attention on the probable mechanism of Hc, shows Hc as a neurogenic dysfunction of the 'valve function' between the inspiratory complex and the glottis closure complex.

Glottis↗