Comparative characteristics of local anesthetics in brachial plexus block for surgery in dogs

The objective of this study was to compare three different local anesthetics in terms of duration and effectiveness of block development in brachial plexus block for osteosynthesis of radius with plate in dogs. The blockade was received a electroneurostimulation-guided Stimuplex HNS 12 with SENSe function by B. Brown for all group. 15 dogs of smallest breeds were divided into three random groups: in the first, 2% lidocaine solution was used as anesthesia; in the second bupivacaine 0.5%, in the third ropivacaine 0.5%. The time to development and the duration of the local block were assessed with a pinch method in several areas. The fastest development of a complete limb block was observed in group 1, which took an average of 7-10 minutes. The development of a complete block in the 2nd group exceeded three times, and in the 3rd - twice, the anesthetic indicators of the 1st group. All patients from group 1 were immediately injected with analgesics after surgery to relieve postoperative pain. The duration of the blockade of the third group was significantly shorter than in the second group, however, the motor block in the second group was significantly longer than in the 3rd group, patients experienced pain, but the motor function of the distal limb has not yet recovered. Thus, ropivacaine, by its properties, is the drug of choice for brachial plexus blockade for periosteal osteosynthesis of the forelimb in dogs and can be used for surgeries longer than 80 minutes.