Thank you for posting your query at DoctorSpring.com
I have noted your mother-in-law medical problems and her current situation.
She is suffering from a serious brain disease, called as central pontine/extrapontine demyelination (osmotic demyelination) syndrome, which has a very high chance of death and disability. This happens due to rapid changes in the level of sodium in blood/brain.
There is no specific treatment for this condition. Only supportive treatment can be given, as is being done now. Despite this, most patients do not survive, and those who survive, have severe disabilities such as weakness of limbs, unconscious state, bed bound state, etc.
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist