Sequential Bilateral Bronchoscopic Lung Volume Reduction for Residual Hyperinflation Following Successful Index...

Area of Science:

• Pulmonary Medicine
• Interventional Pulmonology

Background:

• Bronchoscopic lung volume reduction (BLVR) is established for emphysema but doesn't resolve symptoms in all patients, particularly those with residual hyperinflation.
• Persistent hyperinflation significantly impacts pulmonary function and exercise capacity, necessitating further treatment options.

Purpose of the Study:

• To evaluate the safety and effectiveness of sequential bilateral BLVR in emphysema patients with residual hyperinflation after an initial successful BLVR procedure.
• To assess long-term outcomes of bilateral BLVR in this specific patient cohort.

Main Methods:

• Retrospective analysis of 13 patients who underwent sequential bilateral BLVR across two centers.
• Patients had residual hyperinflation after successful index BLVR in the contralateral lung.
• Data collected included pulmonary function tests, lung volumes, gas exchange, exercise capacity, and adverse events.

Main Results:

• Sequential bilateral BLVR led to significant improvements in residual volume (RV), total lung capacity (TLC), RV/TLC ratio, and diffusion capacity for carbon monoxide (DLCO).
• No significant long-term changes were observed in forced expiratory volume in 1 second (FEV1), FEV1/FVC ratio, 6-minute walk test (6MWT), or oxygen requirements.
• Adverse events included pneumothorax in 8% after the index procedure and 15% after the contralateral procedure.

Conclusions:

• Sequential bilateral BLVR is a relatively safe and moderately effective treatment for emphysema patients with significant residual hyperinflation.
• The benefits are observed over an approximately two-year follow-up period, suggesting a durable effect on lung volumes and gas exchange.