To whom should we listen?

A 42 year old man with insulin-dependent diabetes is brought to the hospital by his wife for fever, anorexia, vomiting, and stupor. He has been unable to eat for two days and has not taken his insulin. He is unconscious. The examination indicated pneumonia and diabetic shock. On his wife’s consent, the care team inserts an IV to begin antibiotics, insulin, and electrolytes. Just after insertion, the man wakes up and states “Leave me alone, no hospital, no needles; I’m OK.” The wife asks that the care team ignore the man, restraining him if they must to insert the IV. What should they do?