Fig. 1

Hypercapnia reduces brain edema. a The wet/dry (W/D) ratio of the injured brain of rats in the sham group, group T, group T+H, group T+H+PKCi, and group T+H+PKCαβi rats at 48-h post-FPI. b Representative computed tomography images of coronal section of rats in the sham group, group T, group T+H, group T+H+PKCi, and group T+H+PKCαβi rats at 48-h post-FPI. The darker areas with lower CT values represented cerebral edema. c CT values. The red arrow indicates post-traumatic brain cerebral edema. Data were expressed as means ± SEM. n = 6. ^#p < 0.05 vs. sham, *p < 0.05 vs. group T, ^&p < 0.05 vs. group T+H