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Noninvasive positive pressure ventilation in subjects with stable COPD: a randomized trial

Authors Bhatt SP, Peterson MW, Wilson JS, Durairaj L

Received 27 August 2013

Accepted for publication 7 October 2013

Published 22 November 2013 Volume 2013:8 Pages 581—589

DOI https://doi.org/10.2147/COPD.S53619

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Surya P Bhatt,1 Michael W Peterson,2 Jeffrey S Wilson,1 Lakshmi Durairaj1

1Division of Pulmonary, Critical Care, and Occupational Medicine, Department of Internal Medicine, Roy J and Lucille A, Carver College of Medicine, University of Iowa Hospital, Iowa City, IA, USA; 2Department of Medicine, UCSF Fresno Medical Education Program, Fresno, CA, USA

Background: The use of domiciliary noninvasive positive pressure ventilation (NPPV) in stable chronic obstructive pulmonary disease (COPD) with chronic hypercapnic respiratory failure has yielded variable effects on survival, quality of life, and dyspnea. We hypothesized that use of NPPV in stable COPD and partial pressure of carbon dioxide (PaCO2) <52 mmHg might result in improvement in quality of life and dyspnea.
Methods: Thirty patients with stable COPD (forced expiratory volume in the first second <50% predicted and PaCO2 <52 mmHg) were prospectively randomized to receive domiciliary NPPV (bilevel positive airway pressure, 15/5 cm H2O) or usual therapy for 6 months. Measurements were made at baseline, 6 weeks, 3 months, and 6 months. Primary outcomes were quality of life as assessed by the Chronic Respiratory Disease Questionnaire (CRQ), and dyspnea as measured by the Transitional Dyspnea Index (TDI).
Results: Fifteen subjects in the NPPV arm and 12 controls completed all the study visits. At 6 weeks and 3 months, the NPPV arm showed significant improvement in TDI total score. However, this effect persisted only in the TDI-Task at 6 months (P=0.03). NPPV use was associated with a small improvement in the CRQ-Mastery domain (0.6 versus –0.1, P=0.04). The arterial partial pressure of oxygen (PaO2) in the control arm worsened over the period of the study, whereas it remained stable in the NPPV arm (change –7.2 mmHg versus +2.1 mmHg, respectively, P=0.02).
Conclusion: NPPV resulted in a small improvement in quality of life indices in stable COPD patients with PaCO2 <52 mmHg. Future larger studies will clarify the role of NPPV in this stable subgroup of patients with COPD.


Keywords: noninvasive, ventilation, chronic obstructive pulmonary disease, normocapnia

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