> so the tube stays in your arm and your skin under the monitor remains broken That's not how it works, at least for the Freestyle Libre 3. The cross section o

> so the tube stays in your arm and your skin under the monitor remains broken That's not how it works, at least for the Freestyle Libre 3. The cross section of the needle has C shape rather than a O (technically I believe it's called a cannula). When you remove the applicator that C shape allows the needle to be removed through the hole at the top of the sensor, and only the flexible filament stays I your arm.