title: Bupivacaine blood levels during continuous interscalene block.
mesh_terms: D000328:Adult; D001917:Brachial Plexus; D002045:Bupivacaine / Q000008:administration & dosage / Q000097:blood*; D002849:Chromatography, Gas; D006801:Humans; D009407:Nerve Block / Q000379:methods*; D013997:Time Factors
chemical_list: D002045:Bupivacaine