Impact of Different Lung Isolation Devices on Pharyngolaryngeal Injuries After Pulmonary Resection

Inclusion Criteria: * Age ≥18 years * Scheduled for elective VATS pulmonary resection under general anesthesia * American Society of Anesthesiologists (ASA) physical status I-III * Body mass index (BMI) 18.5-30.0 kg/m² * Written informed consent Exclusion Criteria: * Anticipated difficult airway (Mallampati class IV, previous difficult intubation, airway abnormalities) * Gastroesophageal reflux disease or gastric retention * Active pulmonary infection or bleeding * Severe pulmonary dysfunction (FEV1 \<50% predicted) * Previous lung surgery or bilateral lung surgery * Cognitive impairment affecting outcome assessment * Chronic throat pain or voice abnormalities within 24 hours preoperatively * Abnormal right upper lobe bronchial anatomy on preoperative CT for right-sided procedures * Any condition deemed unsuitable for study participation by anesthesiologist or surgeon