I caused a bit of chaos just over a year ago, I went into hospital for a day procedure, because I am diabetic and had been fasting for 36 hours they tested my BG the meter said "Hi" and was over 35, they started to get a bit panicky at this and cleaned my hands with proper wipes and got the same again, I had the procedure but was then admitted for the diabetes and tested every half hour for 24 hours, put on an insulin pump, it took 12 hours to get my BG under 25, I now test frequently and had my meds increased , I learned to eat to my meter and it took 6 months to get it under proper control.