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Related Experiment Videos

Effects on vocal function and incidence of laryngeal disorder when using a laryngeal mask airway in comparison with

M Zimmert1, P Zwirner, E Kruse

  • 1Department of Anaesthesiology, Rescue and Intensive Care Medicine, University of Göttingen, Germany.

European Journal of Anaesthesiology
|September 29, 1999
PubMed
Summary

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The laryngeal mask airway (LMA) caused less laryngeal discomfort than the endotracheal tube (ETT) after anesthesia. While both methods slightly altered vocal tract acoustics, the LMA showed fewer minor lesions, suggesting a potentially gentler airway management option.

Area of Science:

  • Anesthesiology
  • Otolaryngology
  • Speech and Hearing Science

Background:

  • Airway management during short-duration anesthesia often involves either a laryngeal mask airway (LMA) or an endotracheal tube (ETT).
  • The potential impact of these devices on the vocal tract and voice quality post-procedure requires thorough investigation.

Purpose of the Study:

  • To compare the effects of LMA versus ETT on the vocal tract following short-duration anesthesia.
  • To evaluate patient-reported discomfort, objective laryngeal findings, and voice acoustic characteristics.

Main Methods:

  • A study involving 56 patients undergoing short-duration anesthesia.
  • Pre- and post-operative interviews, videoendoscopy, videostrobolaryngoscopy, and acoustic voice analysis were performed.
  • An age-matched control group of 34 non-anesthetized patients was included for comparison.

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Main Results:

  • Patients managed with LMA reported significantly less post-operative laryngeal discomfort compared to the ETT group.
  • Minor vocal tract lesions were observed in one patient (LMA group) versus six patients (ETT group).
  • No significant differences in 12 evaluated voice acoustic parameters were found between the LMA and ETT groups, although both showed a post-operative increase in fundamental frequency.

Conclusions:

  • Laryngeal mask airway may be associated with reduced post-operative laryngeal discomfort and fewer vocal tract lesions compared to endotracheal intubation.
  • Both airway management techniques appear to have minimal long-term impact on objective voice parameters after short-term anesthesia.