Patients who did not develop any complication in the EBUS-TBNA. Patients may experience intraoperative complications (bleeding, hypoxemia, hypotension, arrhythmia, bronchospasm, pneumothorax, subcutaneous emphysema/mediastinal emphysema, respiratory depression), and postoperative complications (bleeding, pneumonia, respiratory failure, atelectasis, pleural effusion/empyema, pulmonary embolism, pulmonary edema). Complications that develop (such as acute respiratory distress syndrome, delirium, and mortality) will be recorded. After the procedure, any complications that may develop in the patients within 30 days will be questioned and recorded.

Patients who developed complications during EBUS-TBNA. Patients may experience intraoperative complications (bleeding, hypoxemia, hypotension, arrhythmia, bronchospasm, pneumothorax, subcutaneous emphysema/mediastinal emphysema, respiratory depression), and postoperative complications (bleeding, pneumonia, respiratory failure, atelectasis, pleural effusion/empyema, pulmonary embolism, pulmonary edema). Complications that develop (such as acute respiratory distress syndrome, delirium, and mortality) will be recorded. After the procedure, any complications that may develop in the patients within 30 days will be questioned and recorded.

MFI-11: the parameter included in the score is history of congestive heart failure, presence of diabetes mellitus, history of chronic obstructive pulmonary disease or pneumonia, functional health status/dependence, history of hypertension, history of myocardial infarction, cardiac problems, cognitive impairment, history of transient ischemic attack or cerebrovascular accident, history of peripheral vascular disease is questioned. Patients will be monitored according to standard non-operating room anesthesia procedures.

In elderly patients, the indicator of decreased reserves and resulting weakness is called "frailty". Frailty is considered vulnerability and functional impairment caused by a significant decline in multiple systems. When evaluating frailty, objective, repeatable and accepted scales must be used. MFI-11 is a strong predictor of mortality and postoperative complications. MFI-11 is calculated by dividing the existing deficits by the total number of deficits. Each parameter is 1 point, and the MFI-11 score will be calculated by adding all the points and dividing by 11. The higher this score, the more frail the patient. As a result of studies comparing frailty, if the MFI-11 score is greater than ≥ 0.27, these patients are defined as frail.