Purpose: This study aimed to evaluate the effect of controlled hypotension on cerebral oxygen saturation and postoperative cognitive dysfunction (POCD) in patients undergoing nasal surgery. Materials and Methods: Forty patients were randomized by a sealed envelope method into two drug groups: esmolol (Group E. n=20) or nitroglycerin (Group N. n=20) administration prior to surgical inc... https://parisnaturalfoodes.shop/product-category/echinacea-2/