Brachial plexus blockade in chickens with 0.75% ropivacaine
Article first published online: 5 JUN 2009
© 2009 The Authors. Journal compilation © 2009 Association of Veterinary Anaesthetists
Veterinary Anaesthesia and Analgesia
Volume 36, Issue 4, pages 396–400, July 2009
How to Cite
Cardozo, L. B., Almeida, R. M., Fiúza, L. C. and Galera, P. D. (2009), Brachial plexus blockade in chickens with 0.75% ropivacaine. Veterinary Anaesthesia and Analgesia, 36: 396–400. doi: 10.1111/j.1467-2995.2009.00467.x
- Issue published online: 5 JUN 2009
- Article first published online: 5 JUN 2009
- Received 30 September 2007; accepted 16 May 2008.
- brachial plexus;
- local anesthesia;
Objective To evaluate the quality of brachial plexus blockade with 0.75% ropivacaine in domestic chickens.
Study design Prospective experimental trial.
Animals Six 30-week-old female chickens, weighing 4.5 ± 0.4 kg.
Methods Six brachial plexus injections were performed after anesthetic induction with isoflurane. After achieving adequate muscle relaxation, the animals were positioned in dorsal recumbency and injected with ropivacaine (1 mL kg−1). The birds recovered and assessments of motor function and response to pinch were scored every 5 minutes for 180 minutes. The scores were from zero (no response) to three (greatest response). The scores over time were analyzed using a Wilcoxon nonparametric test with statistical significance accepted if p ≤ 0.05.
Results There was a significant difference (p < 0.05) from 15 to 130 minutes and 15 to 120 minutes for motor and sensory blocks, respectively. The onset of both blocks took 15 minutes and the effective periods of sensory and motor anesthesia were 105 and 115 minutes, respectively. Comparison between blocks at different times did not demonstrate significant differences (p > 0.05).
Conclusions and clinical relevance No complications were observed after the technique. Brachial plexus blockade with 0.75% ropivacaine is a simple and effective technique for procedures on the thoracic limb of domestic chickens.