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. 2018 Aug;10(Suppl 23):S2704–S2710. doi: 10.21037/jtd.2018.06.79

Table 1. Selection criteria for LVRS.

Variable Inclusion Exclusion
Patient Nicotine abstention >4 months; passed pulmonary rehabilitation Daily steroid intake >20 mg
CT morphology Lung emphysema Significant bronchiectasis
lung function FEV1 <45%, TLC >100%, RV >150% FEV1 <20% and diffusion capacity <20% in homogeneous emphysema
6-MWD <450 m –
Gas exchange – paCO2 >6.7 Pa, paO2 <6.0 Pa in homogeneous emphysema

6-MWD, 6 minutes walking distance; CT, computed tomography; FEV1, forced expiratory volume in 1 second; RV, residual volume; RV/TLC, RV-TLC-ratio (= hyperinflation); TLC, total lung capacity.