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  • Title: Long-term home non-invasive ventilation in chronic hypercapnic chronic obstructive pulmonary disease patients: Real-world impact on lung function, acute exacerbations and survival.
    Author: Freitas C, Serino M, Araújo D, Pinto T, Van Zeller M, Gonçalves M, Drummond M.
    Journal: Clin Respir J; 2021 Oct; 15(10):1130-1138. PubMed ID: 34224645.
    Abstract:
    INTRODUCTION: Although long-term home non-invasive ventilation (H-NIV) has been used among chronic hypercapnic COPD patients, its clinical benefit is still on debate. We aim to assess the impact of H-NIV in chronic hypercapnic COPD patients. METHODS: COPD patients who initiated H-NIV between January 2010 and December 2017 were included. Patients with concomitant respiratory disorders were excluded. Acute exacerbation (AE) before and 2 years after H-NIV initiation was assessed as main outcome. Secondary outcomes included lung function and gas exchange parameters. Survival since H-NIV initiation was determined, and factors related with survival were explored. RESULTS: Seventy-two patients were enrolled. A decrease in partial pressure of carbon dioxide (PaCO2 ) in arterial blood (p < 0.001) and an improvement of partial pressure of oxygen (PaO2 ) (p < 0.001) were achieved using a high-intensity H-NIV. Regarding lung function, residual volume (RV) reduced (p = 0.010) and forced-expiratory volume in 1 s (FEV1 ) improved (p = 0.043) after H-NIV initiation. No significant differences in 6-min walking test (6MWT) were found. Compared with the year before H-NIV initiation, the number of AE diminished in the first and in the second years of follow-up (p < 0.001). The median survival was 79.0 months (95% confidence interval [CI], 52.9-105.1), and the covered distance in 6MWT predicted survival (hazard ratio [HR] = 0.026, p = 0.003) in the multivariate analysis. CONCLUSIONS: High-intensity H-NIV significantly improved FEV1 and hyperinflation, decreased frequency of AEs and led to a remarkable median survival, which was independently predicted by the walking distance in 6MWT.
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