Impact of Maxigesic on Delirium After Minimally Invasive Lung Surgery in Elderly Patients

Inclusion Criteria: * Patients aged 65 years or older undergoing minimally invasive lung lobectomy or segmentectomy Exclusion Criteria: * Hypersensitivity to the main ingredients and additives of Maxigesic * Hypersensitivity to aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) * Alcoholism / Alcohol intoxication * Severe hematological abnormalities * Bleeding tendency (e.g., Spontaneous bleeding) * Severe hepatic dysfunction (AST, AST ≥2.5 \* upper normal limit(UNL) or Total bilirubin ≥3.0 mg/dl) * Severe renal dysfunction (eGFR \<30 ml/min/1.73m2 or Dialysis) * Severe heart failure (Left ventricle ejection fraction \<30%) * Uncontrolled hypertension(HTN) (Systolic blood pressure \>180 mmHg) * Symptomatic asthma in need of treatment * Anticoagulants or antiplatelet agents are maintained for up to 5 days before surgery * Barbiturates or tricyclic antidepressants (TCAs) * High-dose methotrexate (MTX) for cancer treatment * Preoperative cognitive impairment, dementia, or delirium * Inability to understand the research and instructions for this study