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Subjects likely to benefit for lung volume surgery
| Marked disability after rehabilitation (peak work rate <40% predicted) |
| Quit from smoking at least 6 month before |
| Understanding of risks and benefits |
| Heterogeneous enphysiema |
| Marked hyperinflation |
| DLCO <50% >20% as percent of predicted |
| FEV1 < 35% >20% as percent of predicted |
| Normal ejection fraction |
Abbreviations: DLCO, diffusing capacity of the lung for carbon monoxide; FEV, forced expiratory volume in one second
