Know meds like vimpat, dilantin, keppra, zonegran, depakote, and their theraputic levels. Know nimotop. You will give it a lot for SAH patients. Know the BP meds that you will use lots IV/IVP Cardene, labetalol, hydralazine, and your PO bp meds. Know treatment for vasospasams like HHH therapy. Hypertensive, Hypervolemic, Hypernatremic therapy. You will be giving these patients a bolus of fluid quite often. Understand why.
ICP values normal 0-15. Sometimes we will let ICP go up to 25 before we call based on written paramaters. Be familiar with trouble shooting a EVD. You can't flush toward the pt only away. If the EVD wont drain check for kinks, make sure stop cocks are open, drop the drain down. IF not draining then flush the drain away from the pt. If still no drainage call the resident.
You will go to IR for angiograms, treat vasospasams with IA cardene, verapiamil, or even placing stents. Patients whose SAH was treated in IR with a coiling procedure have more risk of vasospasams. The window is 7-21 days out for vasospasam.
I can't think of anything else at this time. Keep asking questions on orientation. Pick your preceptor's brain, and the educator's brain as well. Even ask the docs questions. Most are happy to teach.
Good luck. I worked neuro ICU for 6 years. I really liked it.