Related Experiment Videos
Responses to isoproterenol in a general population sample
The American Review of Respiratory Disease
|November 1, 1978
Summary
Bronchodilator responsiveness, measured by changes in forced expiratory flow, can identify bronchial reactivity. This is particularly relevant for individuals with a history of asthma, even with normal baseline lung function.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
- Epidemiology
Background:
- Obstructive airway diseases are a significant public health concern.
- Identifying bronchial reactivity is crucial for diagnosis and management.
- Standardized methods for assessing bronchodilator response in general populations are needed.
Purpose of the Study:
- To evaluate the response of forced expiratory flow to isoproterenol in a general population.
- To identify the best indicators of bronchodilator responsiveness.
- To explore the relationship between responsiveness and asthma history.
Main Methods:
- Assessed 1,063 subjects from the general population.
- Measured percentage changes in forced expiratory volume in 1 second (FEV1) and maximal flow at 50% forced vital capacity (Vmax50) after isoproterenol inhalation.
- Compared responsiveness between subjects with and without a history of asthma.
Main Results:
- Percentage changes in FEV1 and Vmax50 were the best indicators of bronchodilator responsiveness.
- Subjects with a history of asthma demonstrated higher responsiveness, even with normal baseline lung function.
- Many subjects with baseline abnormalities showed improvement into the normal range after bronchodilator administration.
Conclusions:
- Bronchodilator responsiveness, particularly using FEV1 and Vmax50, is a valuable indicator.
- This responsiveness may help identify bronchial reactivity in epidemiologic studies of obstructive airway diseases.
- The findings suggest a potential role for bronchodilator testing in broader population screening.