Being a nurse and daughter to my dad

My dad suffers from mix dementia is going through a therapy session at least twice a week.  He is doing well with the sessions at Allium Care Centre. They have a specialized set of team.  Being a nurse and a daughter to my dad is sometimes difficult especially when i have to make decisions.  Now that we have done the Lasting Power of Attorney document, wonder if it would be possible to even make a decision for the future medically as a donee.  Those that have been through this I know have been through hard times.  As a nurse and daughter, I will try my best to make him fulfill a full life.