Fig. 3

Histological assessment of lung sections after 8 h of ventilation. a–e Representative images of lung sections stained with hematoxylin and eosin. a Right and b left lung sections from the BLV group and c right (atelectatic) and d left (ventilated with high tidal volume) lung sections from the ULV group. e High-magnification images of perivascular edema from right lung sections of the ULV group. Arrows indicate neutrophils adhering to tunica intima and infiltrating to the perivascular edema. Scale bar = 200 μm. f Histological scores. BLV bilateral lung ventilation, ULV unilateral lung ventilation