If you are not 100% sure, ask, call and don't be afraid to look stupid. Why hid it. It cost someone their life. It cost much pain and suffering in a families life that will be for years, because you did not listen to your gut. When in question, question. Don't do something because you are told to when your gut is telling you that it isn't just right. Doctor's are not God. They have drinking issues, family issues, gambling issues, and lack of caring issues just like all human beings. Soooooooo, they can and do make mistakes. It is not worth your license or conscience knowing you killed someone. Happened to me. Nurse hung 2 iv bags at once and didn't know why she was doing it. "just following orders". Sadly, mother died of fluid overload. 77 pounds gained in 6 days. You took an oath to do no harm, ever.