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Recruiting collapsed lung through collateral channels with positive end-expiratory pressure
Scandinavian Journal of Respiratory Diseases
|October 1, 1979
Summary
Collapsing lung parts can be reinflated using various breathing techniques. Continuous positive airway pressure (CPAP) or positive end-expiratory pressure (PEEP) were most effective, with CPAP preferred for lung re-expansion.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
Background:
- Atelectasis, or collapsed lung, is a common clinical issue.
- Understanding effective reinflation methods is crucial for respiratory care.
Purpose of the Study:
- To investigate the efficacy of different ventilatory patterns for reinflating collapsed human lung segments.
- To compare reinflation via the bronchial route versus collateral channels.
Main Methods:
- Created atelectasis models in excised human lungs.
- Applied five ventilatory patterns: normal breathing (with/without CPAP), deep breathing, and mechanical ventilation (with/without PEEP).
- Measured pressures required for reinflation and compared effectiveness.
Main Results:
- All methods except normal breathing without CPAP successfully reinflated collapsed lung segments.
- CPAP during normal breathing and PEEP during mechanical ventilation were most efficient, requiring smaller transpulmonary pressure swings.
- Collateral reinflation was as effective as bronchial reinflation and may aid secretion clearance.
Conclusions:
- CPAP and PEEP are effective for reinflating collapsed lung segments within clinical pressure ranges.
- CPAP is preferable to PEEP for lung re-expansion.
- Collateral reinflation is a viable and potentially beneficial route for lung re-expansion and secretion clearance.