Lung-volume controlled computerised tomography in real-life acute severe asthma

Area of Science:

• Respiratory Medicine
• Pulmonology
• Medical Imaging

Background:

• Acute asthma exacerbations significantly impact patients' quality of life.
• Understanding airway structural changes during exacerbations is crucial for effective treatment.
• High-resolution computed tomography (HRCT) offers detailed insights into airway morphology.

Purpose of the Study:

• To investigate airway structural alterations during acute asthma exacerbations.
• To compare airway morphology during acute exacerbations with convalescent phases.
• To utilize lung-volume controlled HRCT for precise airway analysis.

Main Methods:

• Recruited eight hospitalized subjects with acute asthma exacerbation.
• Performed HRCT within 72 hours of admission and repeated after 8 weeks.
• Employed a novel lung volume standardization and validated software for airway parameter measurements.

Main Results:

• Airway lumen area remained similar between acute and convalescent asthma phases.
• Significant airway wall thickening was observed during acute exacerbations (p=0.01).
• No correlation found between airway structure dimensions and lung function.

Conclusions:

• This study is the first to demonstrate increased airway wall thickness in acute asthma exacerbations.
• Airway wall thickening, likely due to inflammation, characterizes acute asthma.
• Airway lumen changes during exacerbations are heterogeneous and require further investigation.