There are devices which you can wear on your wrist or a lanyard that trigger an alarm when you fall. If you live alone, the signal can go to a family member or a support center. You are able to speak directly to someone to assess what assistance you need. The device can also be triggered by pressing a button if you feel ill and need help.
There are both local and national services that provide these. With a prescription from her doctor, my Mom's was covered by Medicare.
Sue