Research LetterA Comparative Study of Opioid-free Anesthesia With Opioid-base Anesthesia for Recovery Characteristics and Postoperative Cognitive Dysfunction After Trans-sphenoidal Resection of Pituitary TumorsAyyawar, Hareesh MD*; Bharti, Neerja DNB*; Panda, Nidhi MD*; Chhabra, Rajesh MCh† Author Information Departments of *Anaesthesia and Intensive Care †Neurosurgery, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India The study was presented in “Excellent presentation session” at the 6th international congress of the Asian Society of Neuroanaesthesia and Critical Care at Nara, Japan, March 14–16, 2019. The authors have no conflicts of interest to disclose Address correspondence to: Neerja Bharti, DNB. E-mail: [email protected]. Supplemental Digital Content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's website, www.jnsa.com. Journal of Neurosurgical Anesthesiology 35(1):p 91-92, January 2023. | DOI: 10.1097/ANA.0000000000000839 Buy SDC Metrics Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.