Inclusion Criteria:  Patients undergoing elective surgery Patients needing endotracheal intubation Patients having eithe Type I or Type II diabetes mellitus (those who have been using insulin or OAD for at least the past 5 years)  Exclusion Criteria:  Emergency surgery Difficult intubation story İmpaired airway anatomy Morbidly obese (BMI > 40 kg/m2)