I admit I don't have any experience with a medical alert system, but have been told they can provide peace of mind.
A google search on "wireless medical alert system" just gave me a number of hits. Again, no experience here with that, either, and wireless might just refer to the device the individual wears around the neck.
This one is called cellular, though.
»www.cellularmedicalalertsystems. ··· ems.com/--
Join Team Helix * I am praying for these friends .