Lung Ultrasound Detection of Perioperative Atelectasis in Orthopaedic Surgery: A Comparative Study of Regional versus General Anaesthesia. - Öndağ, Işılay Gizem; Arslantaş, Mustafa Kemal; Altun, Gülbin Töre; Dinçer, Pelin Çorman; Ayanoğlu, Hilmi Ömer (Journal of the Society of Thoracic Carido-Vascular Anaesthesia & Intensive Care, 2026)