Abstract Objective The objective of this trial is to investigate the effects of protective lung ventilation on regional cerebral oxygen saturation (rSO2) during dura opening. that is from Ta (after dura opening) to Tb (before dura closing). in patients undergoing intracranial tumor surgery. Methods This is a randomized controlled trial which will be carried out at the Second Affiliate... https://ashleyshomestores.shop/product-category/twin-sleigh-bed-with-storage/