The objective evaluation of obstructive pulmonary diseases with spirometry.

Area of Science:

• Pulmonology
• Respiratory Medicine
• Clinical Diagnostics

Background:

• Obstructive airway diseases like asthma, chronic bronchitis, and emphysema present with variable or persistent airflow limitation.
• Some patients exhibit features of both asthma and COPD, leading to the Asthma-COPD Overlap Syndrome (ACOS) phenotype.
• ACOS is characterized by irreversible airway obstruction with signs of reversibility.

Purpose of the Study:

• To classify obstructive airway diseases using clinical, radiological, and pulmonary function test (PFT) findings.
• To identify distinct patient subgroups within obstructive airway diseases.

Main Methods:

• A retrospective study of 235 patients with obstructive airway diseases was conducted.
• Patients were evaluated using clinical assessment, radiological imaging, and PFTs, including post-bronchodilator reversibility testing.
• Patients were categorized into five groups: asthma, ACOS, chronic bronchitis, emphysema, and undifferentiated obstruction (UNDO).

Main Results:

• The study identified five subgroups: asthma (24.7%), ACOS (29.8%), chronic bronchitis (26%), emphysema (13.6%), and UNDO (6%).
• Reversibility criteria after bronchodilator treatment were observed in 45.5% of patients.
• The ACOS group represented the largest proportion of patients.

Conclusions:

• Obstructive airway diseases can be classified into five distinct groups based on integrated clinical, radiological, and PFT data.
• Accurate classification of these groups, including ACOS and UNDO, is crucial for appropriate patient management.
• Further research correlating spirometric values (FEV1, FEV1/FVC) and reversibility ratios is recommended for improved diagnostic accuracy.