Effect of Sprotte needle orientation on spinal anaesthesia.
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D000775:Anesthesia, Spinal / Q000379:methods*; D000779:Anesthetics, Local / Q000008:administration & dosage*; D002045:Bupivacaine / Q000008:administration & dosage*; D006801:Humans; D009339:Needles
D000779:Anesthetics, Local; D002045:Bupivacaine