Figure 2: Peak ICP of the SAH rats with argon or N2 treatment at 6 (A), 24 (B) and 72 hours (C). Note: Data are expressed as mean ± SD. *P < 0.05 (unpaired t-test). SAH N2 group: Ventilation for 1 hour with 50% O2/50% N2 1 hour after SAH induction; SAH Ar group: ventilation for 1 hour with 50% O2/50% Ar 1 hour after SAH induction. Ar: Argon; ICP: intracranial pressure; SAH: subarachnoid hemorrhage.