Anesthesia students

Anaesthesiologist .

Regarding anesthesia for neurosurgery, the following statements are true EXCEPT
A. Volatiles, ie Halothane, sevoflurane etc, cause a dose dependent increase in cerebral blood flow.
B. Isoflurane at 1 MAC is safe as far as maintaining a stable intracranial pressure is concerned.
C. Sodium Thiopentone, with its good anticonvulsant properties, reduction in cerebral metabolic requirements and blood flow, make it an good induction agent.
D. Patients in the prone position require a reinforced armoured endotracheal tube s
E. An end tidal carbon dioxide level of 50 mmHg (6.6kPa) is considered safe as far as intracranial pressure is concerned