| Author (measurements) | No. patients | Techniques | Dyspnea Scale Borg/MMRC | FEV1 | FVC | DLCO mL/min/mm Hg | PO2 mm Hg | Mortality |
|---|---|---|---|---|---|---|---|---|
| Little(38) (3 months) | Unilateral thoracoscopic: YAG laser | 7.6/3.6 a 62/2.9 b (32) | 0.74 L a 0.85 L b (28) | 1.82 L a 2.2 L b (28) | 10.3 a 13.7 b (10) | 59.3 a 63.3 b (22) | 5.5% (operative) | |
| Brenner(56) (1-3 months) | 24 | Unilateral thoracoscopic: C02 laser | NR | 0.82 L a 1.18 L b (19) | 2.18 L a 2.96 L b (19) | 8.13 a 8.27 b (19) | NR | 12% (peri-operative) |
| McKenna(59) (6 months) | 72 | Unilateral thoracoscopic: YAG laser (33) Staples (39) | 24% improved more than one grade
b 66% improved more than one grade b | 13.4% improvement
b 32.9% improvement b (72) | 6% increase b 21% increase b (72) | NR | NR | 11% (within 3 months) |
| Wakabayashi(58) (3-6 months) | 443 | Unilateral thoracoscopic: YAG laser | 87.4% improved b (191) | 23.6% of predicted
a 31.0% of predicted b (202) | 55.8% of predicted 67.4% of predicted (203) | 23.6% of predicted
a 33.7% of predicted b (123) | 65.0 a 66.0 b (96) | 4.8% (operative) |
a Preoperative.
b Postoperative.
Abbreviations: DLCO = carbon monoxide diffusing capacity of the lungs; FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity; MMRC = modified medical research council scale; NR = not reported; PO2 = partial pressure of oxygen; YAG = yttrium-argon-garnet laser.
Number in parentheses = number of patients.
From: Lung-Volume Reduction Surgery for End-Stage Chronic Obstructive Pulmonary Disease
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