A double-blind crossover study comparing two doses of Duranest (etidocaine) 1% with a fixed dose of Sensorcaine (bupivacaine) 0.5% utilizing infiltration regional blocks of the fifth ray.
Two local anesthetics, Duranest 1% (etidocaine HCl) and Sensorcaine 0.5% (bupivacaine HCl), were tested against each other in dose-related blocks of the fifth ray. This study was conducted under double-blind cross-over conditions using 24 healthy volunteers. It was found that 4 ml. of either agent was sufficient to anesthetize the fifth ray area in all but 4.2% of the injections and 8 ml. of etidocaine always accomplished complete fifth ray anesthesia. Also, 4 ml. of etidocaine was found to have a more rapid onset and longer duration than the same volume of bupivacaine, 6.3 vs. 8.3 min. onset, and 487 vs. 449 min. duration, respectively. Pain and burning upon injection of either bupivacaine or etidocaine was encountered in 70% of the subjects tested. Residual pain was noted in some of the subjects given etidocaine after complete resolution of sensory anesthesia. Residual pain was not noted in any of the subjects given bupivacaine. Etidocaine was found to have a more rapid onset and a longer duration than bupivacaine or a lidocaine-bupivacaine mixture, and was thus found to be a superior agent in the subjects tested.
D000083:Acetanilides / Q000008:administration & dosage*; D000328:Adult; D002045:Bupivacaine / Q000008:administration & dosage*; D004311:Double-Blind Method; D005041:Etidocaine / Q000008:administration & dosage*; D005260:Female; D005528:Foot / Q000601:surgery*; D006801:Humans; D008297:Male; D009407:Nerve Block; D013997:Time Factors
D000083:Acetanilides; D005041:Etidocaine; D002045:Bupivacaine