THATI AJITH KUMAR; P.SREEDEVI; ANJALI RAJAN; PRAMOD PARTHASARATHY. A study of safety and efficacy of analgesia and anaesthesia between intrathecal fentanyl and butorphanol as adjuvants with bupivacaine 0.5% heavy for lower limb orthopedic surgeries. International Journal of Health and Clinical Research, [S. l.], v. 4, n. 20, p. 45–51, 2021. Disponível em: https://ijhcr.com/index.php/ijhcr/article/view/3175. Acesso em: 26 dec. 2024.