Preservation vs. Dissection of Inferior Pulmonary Ligament for Thoracoscopic Upper Lobectomy

Patients will be categorized into two groups: the division group ,who will receive the division of the inferior pulmonary ligament, and the preservation group, who will not.For the dissection group, we will dissect the inferior pulmonary ligament during the surgery.

Patients will be categorized into two groups: the division group ,who will receive the division of the inferior pulmonary ligament, and the preservation group, who will not.For the preservation group, we will preserve the inferior pulmonay ligament during the surgery.