Background: We aimed to evaluate the combination of inflation- deflation method and fluorography with the ICG injection in the tubeless minimally invasive segmentectomy (no intubation, VATS or Robotic).

Methods: A one- armed, prospective randomized controlled study was designed. The intersegmental plane was not so clear during the tubeless minimally invasive segmentectomy, and the presentation of the plane sometimes cost more time. This study will evaluate consecutive patients with the combination of inflation- deflation method and fluorography with the ICG injection.

Inclusion Criteria:

1. cardio- pulmonary function can tolerate the minimally invasive surgery (including VATS and robotic surgery);
2. benign pulmonary lesion considering for segmentectomy;
3. ≤2cm pulmonary adenocarcinoma with ground- glass components, considering for segmentectomy.

Exclusion Criteria:

1. cardio- pulmonary function can not tolerate the minimally invasive surgery (including VATS and robotic surgery);
2. segmentectomy is not considered as the surgery plan.