Dexcom."  She picks up the Dexcom receiver.  "That's Dexcom, too.  Two Dexcoms!"  Pause.  "Ah, ah, ah!!"  (We watch a fair amount of Sesame Street, and The Count is a fan favorite.)  But last week, when the Dexcom alarmed for a blood sugar over 160 mg/dL, she grabbed the receiver off the kitchen