Abstract: Objective  To better understand the ketoacidosisonset fulminant type 1 diabetes（FT1DM）patients. Methods  A total of 93 cases of ketoacidosisonset patients were divided into three groups according to diabetes type， including group A: type 2 diabetes; group B: type 1 diabetes without fulminant type 1 diabetes; group C: fulminant type 1 diabetes（FT1DM）. Age， glucose， serum sodium， serum potassium， glycated hemoglobin and pH value were compared among groups. Results  Compared with the type 2 diabetes， FT1DM showed high levels of glucose and serum potassium and low levels of glycated hemoglobin， serum sodium and arterial pH. There was no statistical significant difference in serum sodium， arterial pH with shorter diabetic course. Compared with the group B， FT1DM showed higher level of glucose， serum potassium and lower levels of glycated hemoglobin. There was no statistical significant difference in serum sodium and arterial pH. Conclusion  The ketoacidosisonset fulminant type 1 diabetes patients should be given more attention as they shared higher level of serum glucose and  potassium. Not only the diabetes types， the time span from the onset of hyperglycemic symptoms to the ketoacidosis may affect the the laboratory data.

Key words: diabetic ketoacidosis；diabetes, type 1; , blood , glucose