Raul Carvalho1, Marta Carvalho1, António Palha1 and Liliana Vasconcelos2 2023. CO 2 - PROXIMAL FEMUR FRACTURE ANESTHESIA TECHNIQUE - DOES IT REALLY MATTER?. Journal of the Portuguese Society of Anesthesiology. 31, 1 (Dec. 2023). DOI:https://doi.org/10.25751/rspa.26698.