Working nights once, I had to leave in a hurry because my sister had called 911 for my father, who was dying, but he didn't want anything done so I had to get there before the paramedics. Last thing I did was an accucheck on a patient, it was too low (about 70) for insulin. I recorded the accucheck, but didn't give the insulin- instead of initialing that and circling to indicate it was not given, I left it blank. Day nurse saw it was blank, gave the insulin, but signed my initials in the box. Patient crashed, since he was already too low. Day nurse checked MAR again, saw the low sugar that was recorded, decided she screwed up by giving the insulin, so tried to backtrack by circling my (HER) initials, then wrote on the back: "Insulin signed in error- not given due to low BS", then again signed MY initials to that statement. Too elaborate on her stupidity: This was back when night nurses charted in red ink, day shift in blue. So on the MAR the BS was charted in red ink, but the insulin was charted in BLUE! And a blind man would have been able to tell that her initials and mine were not even close to matching. Patient crashed and was sent out, nurse was canned, I was written up for leaving the insulin box blank- a 'med error'.