IRCT20190904044685N2 IRCT 2019-10-12 Tehran University of Medical Sciences Postoperative nausea and vomiting in patients undergoing elective laparoscopy; comparison of total intravenous anesthesia versus inhalational anesthesia; a randomized clinical trial Comparison of Postoperative Nausea and Vomiting (PONV) with Total Intravenous Anesthesia (TIVA) versus Inhalational Anesthesia in patients undergoing Elective Laparoscopy in Imam Khomeini Hospital Complex-Tehran (IKHC) 2018-08-23 anticipated 100 Complete https://irct.ir/trial/41929 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: Randomization on an individual level using 4 number blocks created in excel software. Allocation concealment has been carried out, Blinding description: Given the patient's anesthesia after receiving the induction which is identical in both groups, the patient is blind to the type of anesthesia, due to the apparent difference between the two types of anesthesia (inhaler jet mask and intravenous injections). Anesthesiologist (PI) and researcher are not blind to the type of anesthesia and the study is conducted in a single-blinded manner. Data collectors and data analysts have also been blinded. 3 Postoperative nausea and vomiting. Intervention 1: Intervention group: Total intravenous anesthesia. In the intravenous group, 50cc of Propofol 1% was combined with 1-2cc of Remifentanil and was intravenously infused at the speed of 15-20cc/hr. Depending on patients’ needs and duration of the surgery, the dosage altered to ¬±5cc. Intervention 2: Control group: Inhalational anesthesia. In the inhalation group, Isoflurane %1.5-1.7 in combination with 1cc Fentanyl and 1cc Atracurium were used every 45-60 minutes during the operation. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no further information