Comparison Of Hyperbaric Ropivacaine With Fentanyl Versus Hyperbaric Bupivacaine With Fentanyl In Elective Surgical Patients Undergoing Lower Abdominal Surgery Under Spinal Anaesthesia. International Journal of Environmental Sciences, [S. l.], p. 4519–4526, 2025. DOI: 10.64252/shvm3s28. Disponível em: https://theaspd.com/index.php/ijes/article/view/9244.. Acesso em: 17 apr. 2026.