title: [Preoperative infiltration in proctologic surgery].
mesh_terms: D006487:Hemostasis; D006801:Humans; D007279:Injections, Subcutaneous; D008722:Methods; D009638:Norepinephrine / Q000008:administration & dosage*; D012002:Rectal Diseases / Q000601:surgery*
chemical_list: D009638:Norepinephrine
vernacular_title: Infiltración preoperatoria en cirugía proctológica.