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It depends on several things:
1. how long was patient in coma
2. reasons for coma
3. duration on sedatives
4. other comorbidities (ex.asthma, cold, COPD)
5. how quickly tried to take her/him off the respirator
Unfortunately bacterial meningitis is a bad news.......
if not treated within the first 24 hours - has extremely poor prognosis.
more info needed - how about other vital functions, reflexes and cranial nerve responses?
She had Babinski reflex (both feet)
No blink to visual threat
The Doll's Eye Reflex (present but incomplete)
No response to deep pain
Minimal gag reflex
Difficulty regulating body temp and blood pressure
this does not look good at all.
as far as you describe - she is lacking most of the cranial nerve function (except minimal CN 9 and 10) this is supported by "posturing"
I am sceptical about ability to comeout of vent and ability to regain any sort of meaningfull function.