title: Effects of concentration of local anaesthetic drugs in extradural block.
abstract: An increase in the concentration of bupivacaine from 0.5% to 0.75% and etidocaine from 1.0% to 1.5% for extradural block resulted in a more rapid onset of sensory analgesia and motor blockade, a greater frequency of adequate analgesia,a greater depth of motor block and a longer duration of sensory analgesia and motor blockade. An increase in the concentration of prilocaine from 2% to 3% failed to reveal any significant advantage. The use of the more concentrated solutions of bupivacaine and etidocaine would appear to afford significant clinical advantages in extradural anaesthesia for surgery.
mesh_terms: D000083:Acetanilides / Q000008:administration & dosage*; D000328:Adult; D000767:Anesthesia, Epidural; D002045:Bupivacaine / Q000008:administration & dosage* / Q000494:pharmacology; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D005041:Etidocaine / Q000008:administration & dosage* / Q000494:pharmacology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons / Q000187:drug effects; D009407:Nerve Block; D011318:Prilocaine / Q000008:administration & dosage / Q000494:pharmacology
chemical_list: D000083:Acetanilides; D011318:Prilocaine; D005041:Etidocaine; D002045:Bupivacaine