title: Potency ratios for local anesthetics in regional blocks: how long must we wait?
authors.forename: John F
authors.initials: JF
authors.lastname: Butterworth
mesh_terms: D000577:Amides / Q000008:administration & dosage; D000765:Anesthesia, Conduction / Q000592:standards*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D002045:Bupivacaine / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D006801:Humans; D009407:Nerve Block / Q000592:standards; D000077212:Ropivacaine
chemical_list: D000577:Amides; D000779:Anesthetics, Local; D000077212:Ropivacaine; D002045:Bupivacaine