Tara Roberts knew her son's blood sugar was becoming dangerously low before he did.

Roberts was at home in Glace Bay and her son was at university in Antigonish last month. But because he had a continuous glucose monitoring device, Roberts got an alert on her phone.

"I wish I didn't know what a Dexcom alarm even sounded like," she said, using the device's brand name.

"It's not something that anybody wants to wear, but it is what's needed."

After calling her son and his roommate and not getting a re…