Inclusion Criteria:  Who volunteered to participate in the research, Total hip replacement surgery planned, Who are over 18 years old, ASA I and II group, First time hip replacement surgery  Exclusion Criteria:  Diabetes mellitus, In the emergency patient group, with gastroesophageal reflux, Those with esophageal disease (Hiatus hernia, esophagitis, achalasia…) Having endocrine problem, Diagnosed with ileus, With pyloric stenosis, ASA III and IV group, Intravenous fluid administered before surgery, Using drugs that affect blood glucose levels, Previous hip replacement surgery Body mass index over 35kg/m2 (The value obtained by dividing the weight in kilograms by the square of the height in meters), Having a psychiatric and neurological diagnosis, poor general condition, Needing all kinds of fluid and blood support in the pre-operative period, Patients who use alcohol or cigarettes