Techniques of assessing small airways dysfunction

Area of Science:

• Pulmonology
• Respiratory Medicine
• Airway Physiology

Background:

• Small airways (<2mm diameter) are key sites for lung disease pathology, particularly in chronic obstructive pulmonary disease (COPD) and asthma.
• Pathology in small airways often precedes clinical symptoms or detectable changes in spirometry and imaging.
• Historically termed 'the quiet zone,' small airways are challenging to study due to inaccessibility for biopsy and imaging difficulties.

Purpose of the Study:

• To provide an overview of small airways physiology.
• To discuss traditional and advanced tests for assessing small airway function.
• To highlight the potential for earlier diagnosis and intervention in respiratory diseases.

Main Methods:

• Review of small airways physiology.
• Discussion of established lung function tests.
• Exploration of specialized tests for small airway assessment.

Main Results:

• Small airway dysfunction is an early feature of significant respiratory diseases.
• Advanced functional tests are emerging from research into clinical practice.
• These specialized tests can detect small airway changes earlier than traditional methods.

Conclusions:

• Early detection of small airway pathology is possible with newer functional tests.
• These tests are becoming vital for diagnosing and monitoring respiratory conditions.
• Advancements in small airway assessment promise improved patient outcomes through timely intervention.