Effectiveness and safety of ultra-low-dose spinal anesthesia versus perineal blocks in hemorroidectomy and anal fistula surgery: a randomized controlled trial

por Peterson Soares Santos, Rafael, Dias de Oliveira-Filho, Alfredo, de Freitas Lins Neto, Manoel Álvaro, Correia Lins, Lucas, Timbó Barbosa, Fabiano, Felizardo Neves, Sabrina Joany
Publicado 2023