Laparascopic Sleeve Gastrectomy

Shoulder pain is a well-recognized complaint following laparoscopic surgery. It is underlying mechanism has various causes, therefore, modalities in management and prevention of this sort of pain are numerous with different success rates. In the light of this, the investigators aim to compare an anesthetic management plan involving using ketamine (which is a known intraoperative anesthetic agent) to another not involving it for participants undergoing gastric sleeve, and compare the incidence and intensity of shoulder pain afterwards.