Prolongation of spinal blocks with vasoconstrictor drugs.
D000775:Anesthesia, Spinal; D004809:Ephedrine / Q000627:therapeutic use*; D004837:Epinephrine / Q000627:therapeutic use*; D006801:Humans; D010656:Phenylephrine / Q000627:therapeutic use*; D013748:Tetracaine / Q000494:pharmacology*
D013748:Tetracaine; D010656:Phenylephrine; D004809:Ephedrine; D004837:Epinephrine