Effects of intraoperative low‐dose esketamine on postoperative pain after vestibular schwannoma resection: A prospective randomized, double‐blind, placebo‐controlled study

Esketamine may reduce acute postoperative pain in several settings. However, the effects of low-dose esketamine on postoperative pain after vestibular schwannoma (VS) resection with propofol/remifentanil total intravenous anaesthesia (TIVA) are unclear. The aim of this study is to observe the effects of intraoperative low-dose esketamine on postoperative pain after vestibular schwannoma resection.