Lung volume changes
Three and 6 months after TLUL, the changes in lung volume on the operative side were not significantly different between Group P and Group D (− 504.39 ± 465.54 ml vs. − 418.06 ± 521.90 ml at 3 months; − 487.02 ± 324.63 ml vs. − 422.56 ± 317.80 ml at 6 months, both Change in lung volume between two groups (ml, x ± s)