Precipitation of local anesthetic drugs in cerebrospinal fluid.
D000693:Anaerobiosis; D000767:Anesthesia, Epidural; D000775:Anesthesia, Spinal; D000779:Anesthetics, Local / Q000134:cerebrospinal fluid*; D011232:Chemical Precipitation; D004837:Epinephrine; D005041:Etidocaine / Q000134:cerebrospinal fluid; D006801:Humans; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D009407:Nerve Block; D013447:Sulfites
D000779:Anesthetics, Local; D013447:Sulfites; C005200:sodium metabisulfite; D005041:Etidocaine; D004837:Epinephrine