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[Forced expiration. Various current concepts, 50 years after Robert Tiffeneau]
T Similowski1, M F Doré, L Marazzini
1Service de Pneumologie, G-H Pitié Salpêtrière, Paris, France.
Revue Des Maladies Respiratoires
|March 13, 1998
Summary
Recent physiological advances improve spirometry, enhancing understanding of forced expiration. New methods offer reproducible expiratory flow limitation detection and quality assessment, aiding clinical practice.
Area of Science:
- Pulmonary Physiology
- Respiratory Medicine
Background:
- Spirometry, a cornerstone of pulmonary function testing, has evolved significantly since its inception.
- Understanding the determinants of the forced expiratory maneuver is crucial for accurate respiratory assessment.
Discussion:
- Investigates the impact of preceding inspiratory maneuvers on expiratory flow, potentially due to viscoelastic effects impacting standardization.
- Explores the utility of negative expiratory pressure (NEP) for reproducible, non-cooperative detection of expiratory flow limitation.
- Highlights methods for verifying expiratory performance quality and identifying insufficient effort.
Key Insights:
- Inspiratory maneuvers influence expiratory flow, posing standardization challenges.
- Negative expiratory pressure (NEP) offers a simple, reproducible method to detect flow limitation.
- Assessing expiratory effort quality is vital for reliable spirometry results.
Outlook:
- Further research into viscoelastic phenomena can refine spirometry standardization.
- NEP holds promise for pediatric and non-cooperative patient spirometry.
- Improved quality assessment will enhance the diagnostic accuracy of spirometry.