This coin-sized smart insulin patch could monitor glucose for diabetes management

Researchers were able to preload enough insulin into the coin-sized adhesive microneedle patches to enable clinical use. [Image courtesy of UCLA]
The adhesive patch monitors blood sugar and has doses of insulin pre-loaded in tiny microneedles on the patch to deliver medicine quickly when glucose levels reach a certain level. The insulin delivery slows down once it detects glucose levels are back in a normal range. It is the size of a quarter and can be easily manufactured for once-a-day use.
You can read more about it here.