A personal call system is a way for her to reach someone when she cannot reach the phone. It does not stop a fall or a spell of illness, and no device should be sold to you as if it does. What it can do is shorten the time between a problem and a person who comes. That depends on three things: whether she will wear or carry it, whether the signal works throughout this house, and who is on the other end of the call.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Will she wear it
The best system is the one she will use. Ask whether it is worn on the wrist, on a cord around the neck, or clipped to clothing. Ask her whether she will wear it in the bath and at night. Many people take a device off to bathe or sleep and forget to put it back on. Plan for that gap instead of hoping it closes.
Does the signal reach her rooms
Walls, floors, and metal framing change range. Ask the company how the system reaches the bathroom, the far end of the hall, and the bed on the opposite side of the room. Test it yourself by walking through the house with the device and pressing it at each spot, or ask whether a trial period lets you do that before the contract is final.
Who answers the call
This is the question most families skip. Some systems connect to a monitoring center, some call family phones in order, and some do both. Ask who is called first, how many attempts are made, how long the system waits before escalating, and what happens if nobody answers. Ask whether the center can see her address and any notes you give them, and how you update them when a family member changes.
What the detection claims can and cannot catch
Some devices advertise automatic fall detection. Treat that as a feature to question, not a guarantee. Ask the company what its detection can miss, how it was tested, and whether the test was done on people like her. If the company cannot answer plainly, that tells you something. Do not rely on any automatic feature in place of a way for her to press for help.
Battery, charging, and cancelling
Find out how often the device needs charging, what the battery warning looks like, and who replaces the unit if it fails. Ask how to cancel, how much notice is required, and whether a pause is allowed while she is in the hospital or away. Put those answers in writing.
When the question belongs to the care team
Whether she needs this device, and how it fits her daily routine, is worth raising with her doctor or the therapist who has seen her move. They can say whether her risk changes at certain times of day, and the plan should follow from their view as well as yours.