An 18-year-old woman has been suffering from diabetes mellitus for 5 years. She receives 36 units of insulin per day. During pneumonia her condition got abruptly worse: the patient presented with increased thirst, abdominal pain, nausea, vomiting and sleepiness. In the evening the patient refused to eat and didn't get her regular insulin dose; in the morning she lost consciousness. Objectively: the patient is unconscious, the skin is dry, turgor is decreased. The tongue is also dry. Respiration is deep and noisy, there is sharp smell of acetone from the mouth. Body temperature is 36,6°C, Ps is 100 bpm, small; AP is 90/50 mm Hg. Urine exhibits extremely positive reaction to acetone. Blood glucose is 33 millimole/l. What is your