The goal of this clinical trial is to understand the impact of three different ventilation modes-pressure-controlled ventilation (PCV), volume-controlled ventilation (VCV), and pressure-regulated volume-controlled ventilation (PRVC)-on airway pressure and intracranial pressure in patients undergoing resuscitation positioning. It aims to evaluate the effects of these ventilation modes on patients in resuscitation positions. The main questions it seeks to answer are: Does the PRVC mode more effectively control airway pressure and intracranial pressure in patients undergoing resuscitation positioning? Does it help to reduce the risk of increased intracranial pressure during surgery?
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Average Airway Pressure (PAWM) in the Trendelenburg Position
Timeframe: Measurements will be taken at five specific time points: before and after pneumoperitoneum at 5, 10, 15, and 20 minutes.
Optic Nerve Sheath Diameter (ONSD) as a Measure of Intracranial Pressure
Timeframe: ONSD measurements will be recorded at the same five time points as PAWM: before and after pneumoperitoneum at 5, 10, 15, and 20 minutes.