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Wheezes

N Meslier1, G Charbonneau, J L Racineux

  • 1Laboratoire d'EFR et de sommeil, Service de Pneumologie, Angers, France.

The European Respiratory Journal
|November 1, 1995
PubMed
Summary
This summary is machine-generated.

Wheezes, continuous lung sounds, vary greatly in pitch, complicating automated analysis. Standardization of breath sound analysis is needed for accurate wheeze identification and diagnosis in various respiratory conditions.

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Area of Science:

  • Pulmonary Medicine
  • Acoustic Analysis of Lung Sounds
  • Respiratory Physiology

Background:

  • Wheezes are continuous adventitious lung sounds defined by the American Thoracic Society as high-pitched sounds (≥400 Hz), distinct from lower-pitched rhonchi (≤200 Hz).
  • Significant variability in wheeze frequency complicates automated analysis and quantification, highlighting the need for standardized breath sound analysis methods.
  • Understanding wheeze production mechanisms, from vibrating reed models to fluid-induced airway fluttering, is crucial for accurate interpretation.

Purpose of the Study:

  • To address the challenges in automated wheeze analysis due to frequency variability.
  • To emphasize the need for standardization in breath sound analysis for diagnostic criteria development.
  • To explore the relationship between wheeze characteristics and respiratory conditions like asthma.

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Main Methods:

  • Review of existing definitions and models of wheeze production.
  • Analysis of studies correlating wheeze characteristics (presence, duration, pitch, intensity) with respiratory function.
  • Evaluation of wheeze detection and quantification for assessing bronchial hyperresponsiveness and nocturnal asthma.

Main Results:

  • Wheezes are common in obstructive airway diseases, particularly asthma, with some correlation between obstruction severity and wheeze proportion of the respiratory cycle.
  • No significant relationship found between wheeze intensity/pitch and pulmonary function (e.g., forced expiratory volume in one second).
  • Wheeze detection offers supplementary information to spirometry in bronchial provocation testing and may aid in monitoring nocturnal asthma.

Conclusions:

  • Standardization of wheeze analysis is essential for reliable diagnostic criteria.
  • While wheeze characteristics correlate with some aspects of airway obstruction, they cannot fully replace spirometry for predicting lung function.
  • Continuous wheeze monitoring shows potential as a tool for evaluating and managing nocturnal asthma.