Division of the inferior pulmonary ligament during upper lobectomy does not improve postoperative pulmonary function: a systematic review and meta-analysis of observational studies and randomized controlled trials.

For right upper lobectomy, a trend towards greater Bronchial angle change due to IPLD was demonstrated, although the difference did not reach statistical significance.

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For right upper lobectomy, the pooled analysis showed a trend toward a difference in bronchial angle changes between IPLD and IPLP, but it was not statistically significant.

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