When I was in nursing school, there was also a new nurse on the floor I had clinicals on that had given something like 10 units of REGULAR insulin SQ when the order called for 10 units of 70/30 SQ. It was reported to the charge RN who said, and I quote, "don't tell me... it didn't happen... keep your mouth shut." I don't believe it was ever reported. I was shocked then too.
My only advice is not only learn from YOUR mistakes but everyone elses as well. Because of that incident, I verify every insulin I give with another RN and document their name with the med in our computer charting program (plus, it's protocol to verify insulin dosages but EVEN if it weren't, I would still do it)
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