Effects of speed and direction of injection on the level and duration of spinal anesthesia.
D000775:Anesthesia, Spinal; D000777:Anesthetics / Q000008:administration & dosage*; D001827:Body Height; D006801:Humans; D013046:Specific Gravity; D013594:Syringes; D013748:Tetracaine / Q000008:administration & dosage; D013997:Time Factors
D000777:Anesthetics; D013748:Tetracaine