Role of perioperative diaphragmatic point-of-care ultrasound in assessing postoperative pulmonary complications in brachial plexus repair surgeries with preexisting hemidiaphragm paresis: A prospective observational study. - Geetha, Singam; Jayaram, Kavitha; Durga, Padmaja (Journal of Anaesthesiology Clinical Pharmacology, 2026)