So the patient is admitted and is diabetic: on insulin at home with unknown dosages.
The admitting doctor puts the patient on a regular diet and does not order any insulin because the patient does not know the dosages.
The next day the patients blood sugar is >400.
So nurse Jane calls the doctor and says: your patient is on insulin at home, do you at least want to order a sliding scale for insulin coverage?
Dr Dirty Coat: No.
Jane: The patient is on insulin at home.
Dr Dirty Coat: I do not know the dosage. You want me to be telepathic?
Jane: (ewww) No. I do not want you to be telepathic. I do want: You to know that your patient is diabetic, put them on a diabetic diet and even if you do not know what the patient takes at home, I expect you to cover the high glucose while in the hospital. So…. the blood sugar now is > 400, do you want to leave it like that or do you want to give the patient some insulin?