Home blood glucose meters replace urine testing (late 1970s)
Before portable meters, patients tested urine at home, which lagged blood glucose by hours and missed rapid swings. Devices like the Ames Glucometer (1978) gave immediate blood readings for the first time.
Point-of-care glucose testing transformed daily diabetes management within a decade.
The test-strip and meter infrastructure CGMs later replaced was built in this era.
Libre Duo does for ketones what home meters did for glucose: replaces lagging, one-off tests with immediate continuous data.
