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New technique of brachial plexus anesthesia in dogs
Anesthetic block of the brachial plexus is a common procedure in human but less in veterinary surgery. A group from Brazil developed and described a new technique for dogs.

Twelve adult mongrel dogs, six males and six females weighing 14.8 Ā± 1.75 kg were included in this prospective study.

The animals were sedated with acepromazine 0.05 mg kg1 and anesthetized with propofol (6 mg kg1, IV bolus) followed by an infusion of 212 Āµg kg1 minute1. The brachial plexus block technique was performed utilizing the brachial artery as an anatomic landmark, the needle was inserted from the axilla and a nerve stimulator was used to ensure the accuracy of needle placement. Bupivacaine (0.375% with 5 Āµg mL1 epinephrine) was used at a dose rate of 4 mg kg1. Dogs underwent mid-diaphyseal osteotomies of the humerus followed by intramedullary pin fixation.

Onset time to motor and sensory block were 9.70 Ā± 5.52 and 26.20 Ā± 8.86 minutes, respectively. Analgesia lasted for 11.11 Ā± 0.47 hours. The block was effective in 91.6% of the animals, being verified by anesthesia of the whole front limb distal to the shoulder. One animal became hypotensive after the block and did not undergo the surgery at that time. In the remaining 10 animals the heart and respiratory rates, blood pressure, blood gas parameters and plasma bicarbonate concentration did not show any statistically significant alterations during the surgical procedure.

This brachial plexus block technique is effective in most cases to provide surgical analgesia for the front limb distal to the shoulder. Various surgical procedures in the front limb can be performed with a regional anesthetic technique without the use and concomitant risks of general anesthesia in dogs. Long-lasting analgesia associated with this technique may also provide a valuable tool for the management of pain in the forelimb.

Source: Futema, FĆ”bio, Fantoni, Denise Tabacchi, Auler, JosĆ© OtĆ”vio Costa, Cortopassi, Silvia Renata Gaido, Acaui, Andrea & Stopiglia, Angelo JoĆ£o (2002): A new brachial plexus block technique in dogs. In: Veterinary Anaesthesia and Analgesia 29 (3), 133-139.








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