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Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults
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Assessment of bronchodilator response in various spirometric patterns
Amir Houshang Mehrparvar1, Mohammad Hossein Davari2, Mojahede Salmani Nodooshan2
1Department of Occupational Medicine ; Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Tanaffos
|September 6, 2014
Summary
Spirometry can help diagnose asthma by measuring lung function. Some asthma patients with restrictive or mixed patterns may still respond positively to bronchodilator tests, indicating bronchial responsiveness.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
Background:
- Spirometry assesses lung volumes and airflow rates over time.
- Bronchodilator response evaluates bronchial responsiveness using changes in FEV1 and FVC.
- Asthma diagnosis and management often rely on spirometry findings.
Purpose of the Study:
- To evaluate bronchodilator reversibility in asthma patients presenting with diverse spirometric patterns.
- To determine the prevalence of bronchodilator response across different spirometric classifications in symptomatic individuals.
Main Methods:
- A cross-sectional study involving individuals with symptoms like dyspnea, cough, or wheezing.
- Bronchodilator testing was administered to assess changes in spirometric parameters.
- Comparison of bronchodilator response across various spirometric patterns.
Main Results:
- Overall, 24.5% of participants demonstrated a positive bronchodilator response.
- Forced expiratory volume in 1 second (FEV1) showed the highest frequency of response.
- Individuals with a mixed spirometric pattern exhibited the most frequent bronchodilator response.
Conclusions:
- Asthma patients may present with spirometric patterns beyond obstructive, including restrictive or mixed.
- Bronchodilator administration can reveal significant improvements in lung function even in non-obstructive patterns.
- These findings highlight the importance of considering bronchodilator response in all symptomatic asthma patients, irrespective of initial spirometry results.
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