The Effect of Two Different Anesthetic Methods on Gastrointestinal Motility in Patients Scheduled for Laparoscopic Sleeve Gastrectomy: a Prospective, Randomized, Single Blinded Clinical Trial

Aim of this study is to evaluate the effect of two anesthetic methods on gastric motility during laparoscopic sleeve gastrectomy. Patients scheduled for laparoscopic sleeve gastrectomy with American Society of Anesthesiology (ASA) physical status II and III will enrolled into two groups. Computer based randomization will be used for the group selection. Patients will be monitored with standard monitorization (peripheral oxygen saturation, non-invasive blood pressure, 3-lead electrocardiography and patient state index (PSI)). Preoxygenation will be performed via a face mask with 6 L/min oxygen for 5 minutes. All patients will receive intravenous 2 mg/kg propofol, 0.25 mcg/kg/min remifentanil for anesthesia induction. Rocuronium bromide will be used intravenously with a dose of 0.6 mg/kg for muscle relaxation. Endotracheal intubation will be performed. In Group 1, inhalation anesthetic, desflurane and in Group 2, propofol infusion will be used with a 2 L/ min fresh gas flow as a mixture of 50 %- 50 % oxygen- medical air for maintenance of general anesthesia. Remifentanil infusion with a dose of 0.05-2 mcg/kg/min will be used in both groups during anesthesia maintenance. Anesthesia depth will be monitored with EEG monitorization where a score of 25-50 will be achieved in PSI . End-tidal carbon dioxide pressure will be kept between 35 and 45 mmHg. End-expiratory positive pressure will be set to 8 mmHg and intraabdominal pressure will be set to 12 mmHg. The surgeon will assess the gastric motility during anastomosis. The peristalsis during 1 minute period will be counted. 1 gram paracetamol and 1 mg/kg tramadol will be given intravenously for pain management. Sugammadex will be used for the reversal of neuromuscular blockade. Postoperative nause and vomiting, the time of first fart will be noted. Surgeon's satisfaction during anastomosis will be assessed with 5 points Likert Scale. Data will be statistically analyzed.