Dr. P. V. PARIKHPADIYA NIKUNJ BIPINCHANDRA2017-05-192017-05-192012http://krishikosh.egranth.ac.in/handle/1/5810011639The present clinical study evaluated the efficacy of bupivacaine HCl (0.5%) and hyperbaric bupivacaine (0.5%) for axillary brachial plexus block in 12 dogs and 12 goats under ultrasonographic guidance with aid of peripheral nerve stimulator (PNS). Ultrasonography of axillary brachial plexus was performed using 7.5-10 MHz linear transducer in all dogs and goats. The axillary brachial plexus was identified as three rounded hyperechoic structures with axillary artery as pulsative hypoechoic structure kept as land mark, also located with the maximum muscle twitching at 0.4 mA current with aid of peripheral nerve stimulator in all animals. Axillary BPB performed using bupivacaine HCl (0.5%) in six dogs, showed complete BPB at dose rate of 2.5 mg/kg b.wt. in two dogs only with mean full onset of 140 + 40 minutes; while in six dogs, wherein hyperbaric bupivacaine was used, four dogs showed a complete BPB at dose rate of 3.0 mg/kg b.wt. with mean full onset of 100 + 40 minutes. Axillary BPB performed using bupivacaine HCl (0.5%) in six goats, showed complete BPB at dose rate of 3.0 mg/kg b.wt. in three goats with mean full onset of 180 + 40 minutes; while in six goats, wherein hyperbaric bupivacaine, four goats showed a complete BPB at dose rate of 3.0 mg/kg b.wt. with mean full onset ofenVeterinary SurgeryStudyThesis