ABSTRACT

Fasting for at least 6-8 hours before anesthesia or sedation is mandatory to reduce the risk of aspiration. The aim of this study is to investigate the effects of carbohydrate and electrolyte mixture, given two hours before the gastroscopy proce-dure, on gastric pH and gastric residue in patients with gastric complaints

After the Ethic Committee approval and Informed Consent Forms were obtained. 80 patients who aged between 18-70 and undergo elective gastroscopy under propofol anesthesia were randomly divided into two groups. The patients were fasted for 6 hours in control (Group K, n=40) and study groups (Group Ç, n=40). The patients in the study group were given 400 ml oral fluid rich in carbo-hydrates (PreOp® - Nutricia, 240 mOsm/l, %12,5 carbohydrate, 50 kcal/100 mL, 0.5 mg/ml Natrium, 1,22mg/ml Potassium) 2 hours before the procedure. 1% propofol was injected until the cooperation and eyelash reflex disappeared and then the en-doscopy was started. During the procedure, upon entering the stomach, the gastric content was aspirated; total amount and pH of the aspirated material were recorded. In all patients mucosal biopsies were taken for diagnosis of Helicobacter Pylori.

Gastric pH value was higher in study group than in control group. No dif-ference was found between the groups with regard to gastric residue volume. The number of the patients with gastric residue >0.4 mL/kg and pH <2,5 diffirence was not found.

Clear fluid administration two hours before gastroscopy elevated the gastric pH without additional increase in gastric residue