There are android apps that interface with Blood glucose meters through bluetooth.
And since Nooks run android she may want to know which Nook might be compatible with one or any of those apps.
Not impossible:
http://www.appszoom.com/android_appl...+glucose+meter
http://www.google.com/search?q=andro...rlz=1I7ACAW_en
But somewhat misinformed since you have to hack the Nooks to get them to run arbitrary android apps. Then again, maybe she can get it working with one of the N2A cards...