A Patient Who Has Diabetes and Uses Insulin to Control

A patient who has diabetes and uses insulin to control blood glucose has been NPO since midnight before having a knee replacement surgery.Which action should the nurse take?

A) Withhold the usual scheduled insulin dose because the patient is NPO.
B) Obtain a blood glucose measurement before any insulin administration.
C) Give the patient the usual insulin dose because stress will increase the blood glucose.
D) Administer a lower dose of insulin because there will be no oral intake before surgery.