This is similar to an idea I proposed for a non-literate UI for a developing world mobile app. If there is no doctor in the village they can get quick first-ai

This is similar to an idea I proposed for a non-literate UI for a developing world mobile app. If there is no doctor in the village they can get quick first-aid tips, organize transport, and a remote doctor can try to assess the problem with pictures. Google e-IMCI to see some actual research in this area, maybe you'll be inspired, though that is focused on more formal procedures for nurses (like detecting what's wrong with a sick child).