Beverly
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        I'm sorry about your father.  I know someone who was diagnosed with dementia but later it was discovered to be water on the brain and had a stint put in and has been fine ever since.  My mother also was diagnosed with this but it turned out to be Creutzfeldt Jacob Disease.  I encourage you to seek further examination until your heart is satisfied.