Hello,
Welcome to Healthcaremagic.
I had gone through your query and understand your concern.
Your sister have clinical features of increased intracranial pressure ( ICP).
She have the typical cushing's triad
hypertension ( low Blood pressure)
Bradycardia ( Slow heart beat)
Irregular respiration
She also have distorted vision ( due to increase in intracranial pressure).
Thus we have to find the cause of Increased intracranial pressure.
It is most commonly seen in space occupying lesion like
brain tumour and it result in impending brain content herniation.
It can also occur in cerebral trauma.
But she does not have any history of trauma recently.
It is most probably due to Some SPACE OCCUPYING LESION LIKE BRAIN TUMOUR.
It is difficult to treat at this age and her condition is so worst.
It is up to you about further management. consider her age and condition now.
Hope this helps.
Regards,
Dr.Manjeth