Comparison of Lma-Protector With Endotracheal Tube: Evaluation of Respiratory Mechanical Parameters During Controlled Ventilation & Possibility of Pulmonary Aspiration

Inclusion Criteria: * Patients aged ≥18 years ASA1-2 who are to undergo planned urological surgery of low or intermediate severity, under general anesthesia in the lithotomy position. Exclusion Criteria: * patients \< 18 years old. * Patients who are going to undergo an emergency/urgent operation/ trauma patients. * Maternal population. * Patients who are not scheduled to receive general anesthesia, but some other type of anesthesia. * Patients in whom LMA placement is contraindicated, such as patients at high risk for reflux and aspiration of gastric contents (eg, history of gastroesophageal reflux, hiatal hernia, pyloric stenosis, gastrointestinal obstruction, morbid obesity). * Patients who meet at least one of the four RODS difficulty criteria. * Contraindicated patients: administration of neuromuscular blockade, suppression of spontaneous respiration, and those with an indication for awake intubation or surgical airway. * Patients who refuse to participate in the study.