During surgery for aortic arch aneurysm under deep hypothermic circulatory arrest, which of the following anesthetic agent administered prior to circulatory arrest that also provides cerebral protection ?
Etomidate
Thiopental sodium
Propofol
Ketamine
Thiopental, etomidate and propofol, all three are cerebroprotective. However, thiopental has maximum cerebroprotective action.
"Propofol and etomidate appear to lack the same protective effects as thiopental in focal cerebral ischemia"   ─ Morgan