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Related Experiment Videos

Tussometry and lung function

G E Murty1, P J Kelly, D Veale

  • 1ENT Department, University Hospital, Nottingham, UK.

Clinical Otolaryngology and Allied Sciences
|April 1, 1994
PubMed
Summary
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The peak value time (PVT) is a reliable measure of laryngeal function, unaffected by lower respiratory tract function. This finding simplifies the interpretation of PVT in clinical assessments of voice and swallowing disorders.

Area of Science:

  • Otolaryngology
  • Pulmonology
  • Speech-Language Pathology

Background:

  • The peak value time (PVT) is an objective tussometric parameter proposed for assessing laryngeal function.
  • The influence of lower respiratory tract function on PVT values remains unclear.
  • Understanding this relationship is crucial for accurate interpretation of PVT in clinical settings.

Purpose of the Study:

  • To investigate the relationship between key lung function parameters and PVT.
  • To determine if lower respiratory tract function affects the laryngeal function measure, PVT.

Main Methods:

  • Seventy-nine subjects were evaluated.
  • Lung function was assessed using forced expiratory volume in 1 second (FEV1), vital capacity (VC), peak expiratory flow rate (PEFR), forced expiratory flow at 50% of vital capacity (FEF50), and total lung capacity (TLC).

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  • The relationship between these lung function parameters and PVT was analyzed.

    • Main Results:

    • PVT was found to be independent of all measured lung function parameters (FEV1, VC, PEFR, FEF50, TLC).
    • No significant correlation was observed between respiratory function and laryngeal function as measured by PVT.

    Conclusions:

    • PVT is a specific and objective measure of laryngeal function.
    • Lung function parameters do not need to be considered when interpreting PVT values.
    • PVT can be reliably used to assess laryngeal function independently of respiratory capacity.