Evaluation of Perioperative Lung Ultrasound Scores (LUS) in Living Donor Nephrectomy Surgeries

"one hemithorax is consisted of 6 scanning zones. Each of them are evaluated via ultrasonography in terms of presence of vertical B lines (\<4 B lines: 1 point; \>3 B lines or thick B lines: 2 points; marked disturbance in pleural line: 3 points). Higher scores reflect worse outcomes such as atelectasis and consolidation, and totally 12 zones are evaluated.~Three different time points are defined for LUS:~T1: 5 minutes after orotracheal intubation T2: At the end of surgery, before extubation T3: 30 minutes after extubation, in postanesthesia care unit.~DeltaT= T2LUS-T1LUS~Blood gas analysis will be evaluated hourly throughout the surgery"