What is diabetic hyperosmolar coma features?

Features are as follows: (1) Symptoms: Severe high blood sugar, severe dehydration, accompanied by nervous system symptoms, a high plasma osmotic pressure, no ketosis. (2) types: more than occurred in non-insulin-dependent elderly patients with diabetes, prone to misdiagnosis. (3) history: only mild diabetes or no previous history of diabetes, and hyperosmolar coma as the first symptom for governance. (4) conditions: incidence rate is lower than ketoacidosis, but the high mortality rate. (5) prognosis: improper treatment, in more than 24 to 48 hours of death. Poor prognosis.