Thongphut, A. (2026). Factors Associated with Hypotension in Patients Aged ≥ 80 Years Old with Hip Fracture Surgery Under Spinal Anesthesia at Hatyai Hospital. Thai Journal of Anesthesiology, 52(1), 19–28. retrieved from https://he02.tci-thaijo.org/index.php/anesthai/article/view/280117