The Improvement of Low-dose Esketamine on Postoperative Depression in Patients Undergoing Bariatric Surgery With Preoperative Depression

The aim of this study is to observe the antidepressant effect of low-dose esketamine in obese patients with preoperative depression and seeking bariatric surgery. We speculate that intraoperative infusion and the addition of a small dose of esketamine to the postoperative analgesic pump can help reduce the proportion of patients with depression after surgery, and may further improve postoperative recovery, reduce the use of postoperative opioids, shorten postoperative hospital stay, and improve postoperative quality of life of patients.