The Trendelenburg Maneuver versus Passive Leg Raising for Predicting Fluid Responsiveness in High-Risk Postoperative Surgical Patients: A Randomized Controlled Parallel-Group Study. - Elaiashy, Fatma M.; Alsherif, Salah El-den Ebrahim; El-Gendy, Hala Mohey El-Deen Mohamed; Abdalraheem, Taysser Mahmoud A.; Fathy, Sameh M. (Bali Journal of Anesthesiology, 2026)