HYPOBARIC BUPIVACAINE (WITH FENTANYL 25 MCG) FOR UNILATERAL SPINAL AN ANAESTHESIA IN HIP FRACTURE SURGERY: A DOSE-RESPONSE STUDY COMPARING TWO DOSAGES. 5 MG VERSUS 7.5 MG. Journal of Pharmaceutical Negative Results, [S. l.], p. 2302–2311, 2022. DOI: 10.47750/pnr.2022.13.S04.284. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/5788.. Acesso em: 15 oct. 2025.