Table 1 Classification and source of postoperative hemorrhage

Bronchial arterial bleeding

Active bleeding of interlobar veins

Exudation of lung tissue surface

Active artrial bleeding of incision

Active bleeding of intercostal veins

Exudation of chest wall

Intercostal arterial bleeding

Active bleeding of superior vena cava

Diaphragmatic exudation

Arterial bleeding of pleural adhesion

Active bleeding of stump of pulmonary vein

No obvious bleeding point but exudation

Arterial bleeding of pulmonary ligament

Active bleeding of azygos vein/semiazygos vein

Active bleeding of pulmonary artery stump

Abnormal arterial bleeding around vagus nerve/phrenic nerve

Lymph node arterial bleeding