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Noninvasive ventilation in chronic obstructive pulmonary disease.
1Brown University, and Division of Pulmonary, Critical Care and Sleep Medicine, Rhode Island Hospital, Providence, Rhode Island 02903, USA. nicholas_hill@brown.edu
Clinics in Chest Medicine
|February 24, 2001
Summary
Noninvasive positive pressure ventilation (NPPV) shows conflicting results for severe COPD patients. While some patients with high CO2 levels may benefit, evidence for sustained improvement or survival is lacking, and adaptation can be challenging.
Area of Science:
- Pulmonary Medicine
- Respiratory Care
Background:
- Numerous studies over 15 years have investigated intermittent ventilatory assistance via noninvasive ventilation (NIV) for severe stable COPD.
- Results are conflicting, with no proven sustained benefits, though short-term rest may improve respiratory muscle function and sleep duration.
Purpose of the Study:
- To evaluate the efficacy and challenges of noninvasive positive pressure ventilation (NPPV) in patients with severe stable COPD.
- To examine the current consensus and evidence supporting NPPV use in this population.
Main Methods:
- Review of existing studies and clinical observations regarding NPPV in severe stable COPD.
- Analysis of factors influencing NPPV success, including patient selection, CO2 retention levels, and adaptation challenges.
Main Results:
- Conflicting evidence exists regarding the benefits of NPPV in severe COPD.
- Patients with severe CO2 retention (PaCO2 > 50-55 mm Hg) are often considered candidates for NPPV trials.
- No confirmed survival benefit or sustained functional status improvement has been demonstrated.
Conclusions:
- A deficiency of robust evidence supports NPPV for severe stable COPD.
- Successful NPPV initiation requires careful patient selection, mask fitting, ventilator settings, and significant patient support.
- Higher failure rates are expected compared to other chronic respiratory failures until patient subpopulations and technology improve.