title: Plain bupivacaine 0.5%: a preliminary evaluation as a spinal anaesthetic agent.
mesh_terms: D000368:Aged; D000775:Anesthesia, Spinal; D002045:Bupivacaine / Q000008:administration & dosage; D006801:Humans; D013046:Specific Gravity
chemical_list: D002045:Bupivacaine