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  • Title: One-Year Follow-Up after Endobronchial Valve Treatment in Patients with Emphysema without Collateral Ventilation Treated in the STELVIO Trial.
    Author: Klooster K, Hartman JE, Ten Hacken NH, Slebos DJ.
    Journal: Respiration; 2017; 93(2):112-121. PubMed ID: 27974713.
    Abstract:
    BACKGROUND: One-way endobronchial valve (EBV) treatment has shown safety and efficacy at 6 months after treatment in patients with severe emphysema and confirmed absence of interlobar collateral ventilation. Longer follow-up in this subgroup is not available. OBJECTIVES: To investigate the efficacy and safety of EBV treatment of the STELVIO cohort at a 1-year follow-up. METHODS: Emphysema patients who have been treated with EBV in the STELVIO trial were invited for a voluntary 1-year follow-up visit. Both the original treatment group and the control group who crossed over to treatment have been included. Analyses are performed on the patients who attended the 1-year follow-up visit. RESULTS: Sixty-four patients received EBV treatment. At 1 year, 40 patients (26 female; mean age 59 ± 8 years; FEV1 0.86 ± 0.29 L; RV 4.56 ± 1.00 L; 6MWD 367 ± 78 m; and SGRQ 56 ± 13 points) visited the hospital. Significant improvements (p < 0.001) were found for FEV1 (+17%, 95% CI, 11 to 24), RV (-687 mL, 95% CI, -918 to -456), 6MWD (+61 m, 95% CI, 42 to 80), and SGRQ (-11 points, 95% CI, -17 to -6). Two patients died: 1 after 58 days due to progressive respiratory failure and 1 after 338 days of follow-up due to a myocardial infarction. Seventeen percent of the patients underwent valve replacement and 22% of the initially treated patients had permanent valve removal. In 22% of the patients, pneumothoraces occurred before 6 months, and none occurred between 6 and 12 months. CONCLUSIONS: EBV treatment results in clinically relevant benefits at 1 year of follow-up. Maintenance bronchoscopies to achieve this are needed. This study supports the use of EBV treatment in carefully selected patients with severe emphysema without collateral ventilation.
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