., S. COMPARATIVE STUDY OF SEQUENTIAL COMBINED SPINAL EPIDURAL ANAESTHESIA VERSUS SPINAL ANAESTHESIA IN HIGH RISK GERIATRIC PATIENTS FOR MAJOR ORTHOPAEDIC SURGERY. International Journal of Medical and Biomedical Studies, [S. l.], v. 4, n. 7, 2020. DOI: 10.32553/ijmbs.v4i7.1306. Disponível em: https://mail.ijmbs.info/index.php/ijmbs/article/view/1306. Acesso em: 15 may. 2026.