Can a cheaper anesthesia combo speed up waking after bariatric surgery?

This trial tests whether switching from one inhaled anesthetic (sevoflurane) to another (desflurane) near the end of weight-loss surgery helps patients wake up just as quickly as using desflurane throughout. Adults with obesity scheduled for laparoscopic gastric bypass will be randomly assigned to one of the two anesthesia plans. The main goal is to see if the swap is no worse than continuous desflurane in terms of time to breathing tube removal, with additional checks on nausea, recovery scores, and costs.