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Efficacy of bronchoscopic lung volume reduction: a meta-analysis

Authors Iftikhar IH, McGuire FR, Musani AI

Received 3 March 2014

Accepted for publication 18 March 2014

Published 14 May 2014 Volume 2014:9(1) Pages 481—491

DOI https://doi.org/10.2147/COPD.S63378

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Imran H Iftikhar,1 Franklin R McGuire,1 Ali I Musani2

1Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of South Carolina, Columbia, SC, USA; 2Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, National Jewish Health, Denver, CO, USA

Background: Over the last several years, the morbidity, mortality, and high costs associated with lung volume reduction (LVR) surgery has fuelled the development of different methods for bronchoscopic LVR (BLVR) in patients with emphysema. In this meta-analysis, we sought to study and compare the efficacy of most of these methods.
Methods: Eligible studies were retrieved from PubMed and Embase for the following BLVR methods: one-way valves, sealants (BioLVR), LVR coils, airway bypass stents, and bronchial thermal vapor ablation. Primary study outcomes included the mean change post-intervention in the lung function tests, the 6-minute walk distance, and the St George's Respiratory Questionnaire. Secondary outcomes included treatment-related complications.
Results: Except for the airway bypass stents, all other methods of BLVR showed efficacy in primary outcomes. However, in comparison, the BioLVR method showed the most significant findings and was the least associated with major treatment-related complications. For the BioLVR method, the mean change in forced expiratory volume (in first second) was 0.18 L (95% confidence interval [CI]: 0.09 to 0.26; P<0.001); in 6-minute walk distance was 23.98 m (95% CI: 12.08 to 35.88; P<0.01); and in St George's Respiratory Questionnaire was −8.88 points (95% CI: −12.12 to −5.64; P<0.001).
Conclusion: The preliminary findings of our meta-analysis signify the importance of most methods of BLVR. The magnitude of the effect on selected primary outcomes shows noninferiority, if not equivalence, when compared to what is known for surgical LVR.

Keyword: emphysema, endobronchial valves, sealants, stents, coils

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