We investigated the relationship between blood glucose level measured by emergency life-saving persons and patient’s condition. The blood glucose measurement by emergency life-saving persons was carried out according to the prepared criteria. Some patients, despite blood glucose levels were less than 50 mg/dl, it was recognized that disturbance of consciousness was mild. On the contrary, patients with blood glucose levels above 50 mg/dl were sometimes admitted to moderate consciousness disturbances. There are several problems with the current protocol, and it seems that it is necessary to instruct the emergency life-saving persons to comply with the protocol.