Tracheal morphology and collapse in COPD: correlation with CT indices and pulmonary function test

Area of Science:

• Pulmonary Medicine
• Radiology
• Medical Imaging

Background:

• Chronic obstructive lung disease (COPD) is a progressive condition affecting the airways.
• Tracheal morphologic changes may contribute to COPD pathophysiology.
• Computed tomography (CT) is valuable for assessing airway structures.

Purpose of the Study:

• To evaluate tracheal morphologic changes in COPD patients using CT.
• To determine the correlation between these changes, pulmonary function tests (PFTs), and CT parameters.

Main Methods:

• Volumetric inspiratory/expiratory CT scans were performed on 92 healthy individuals and 115 COPD patients.
• Tracheal morphologic parameters including tracheal length (tLA) and tracheal index (TI) were measured.
• Correlations between tracheal changes, PFTs, and CT metrics were analyzed in COPD patients.

Main Results:

• COPD patients exhibited significantly lower tracheal indices (TI) compared to controls (0.80±0.15 vs. 0.88±0.11, p<0.01).
• TI correlated with FEV1, FEV1/FVC, GOLD stage, and various CT parameters including emphysema index (EI), mean lung density (MLD), CT-ATI, and lung volume (LV).

Conclusions:

• Tracheal index (TI) is the most significantly altered tracheal morphologic change in COPD patients.
• Tracheal morphologic changes in COPD patients show clinically significant correlations with emphysema severity and CT-derived indices.