How to get Grandma down the stairs?

You could call her doctor and tell him that grandma is socially isolating herself and you are afraid she is getting depressed. The doctor will tell you to bring her in for an appointment. You then tell grandma that she has to go to the doctor and she had better walk downstairs or you will have to call an ambulance, and grandma you know how expensive they are and all the neighbours will talk. Then reure grandma that you and another will ist her down the stairs and hold onto her the whole time and will guarantee that she won't fall. Once you get to the doctor you can further discuss what to do when you get home, to let her go back upstairs or make her a room downstairs. This is just a suggestion. I may or may not help you in your situation. Good luck.