A Comparison of the Local Anesthetic Properties of Bupivacaine and Two New Long‐Acting Agents, HS 37 and Etidocaine, in Epidural Analgesia

Two new local anesthetics, HS 37 and etidocaine, were evaluated in epidural analgesia and compared with bupivacaine. Initially, a dose‐response study was conducted in which concentrations of etidocaine of 0.75%, 1% and 1.5% and concentrations of HS 37 of 0.75% and 1% were employed.