Segmental approach to lung volume reduction therapy for emphysema patients

Area of Science:

• Pulmonology
• Radiology
• Medical Imaging

Background:

• Emphysema distribution is often heterogeneous, even within lung segments.
• Accurate targeting of diseased lung regions is essential for effective interventional lung volume reduction therapies.
• Preserving less diseased lung areas is critical for maintaining function.

Purpose of the Study:

• To review methods for quantifying emphysema severity.
• To introduce the segmental heterogeneity index for quantifying segmental emphysema differences.
• To support the goal of segmental targeting for improved efficacy and safety in vapor ablation patients.

Main Methods:

• Review of various quantification measures for emphysema severity.
• Selection of the tissue/air ratio as a key quantification measure.
• Utilization of software for segmental emphysema quantification based on anatomical boundaries.

Main Results:

• Existing software can quantify emphysema severity at the segmental level.
• The segmental heterogeneity index is proposed to quantify segmental differences in emphysema.
• These methods enable identification of the most diseased lung segments.

Conclusions:

• Segmental targeting of emphysema aims to enhance treatment efficacy and safety.
• The segmental heterogeneity index aids in quantifying regional emphysema severity.
• The STEP-UP trial (NCT01719263) is investigating these techniques in patients with heterogeneous emphysema.