Does the Use of Intratesticular Blocks in Cats Undergoing Orchiectomies Serve as an Effective Adjunctive Analgesic?

Erik Fausak; Elizabeth Rodriguez; Anna Elizabeth Simle; Netwarat Merman; Dakota Cook

doi:10.18849/ve.v3i4.160

DOI

https://doi.org/10.18849/ve.v3i4.160

Abstract

PICO question

In cats undergoing orchiectomy, does the use of intratesticular lidocaine reduce the pain in patients compared to not using intratesticular lidocaine?

Clinical bottom line

With a low grade of evidence, when compared to a pre-medication with pure-µ agonist opioids, intratesticular lidocaine does not appear to provide significant benefit. However, based on our clinical scenario where pre-medication is with a partial-µ opioid like buprenorphine, there may be benefit in utilising intratesticular lidocaine.

Author Biographies

Erik Fausak, Bel-Rea Institute of Animal Technology 1681 S. Dayton St. Denver, CO 80247

Erik is a faculty member and archivist at Bel-Rea Institute of Animal Technology. His primary objective is to train veterinary technicians and nurses in evidence-based strategies of decision making.

Elizabeth Rodriguez, Bel-Rea Institute of Animal Technology 1681 S. Dayton Denver, CO 80247

Elizabeth is a current faculty member at Bel-Rea Institute of Animal Technology.

Anna Elizabeth Simle, Bel-Rea Institute of Animal Technology 1681 S. Dayton Denver, CO 80247

Anna Simle is a current Bel-Rea student and works as a Veterinary Technician at Rocky Mountain Feline Rescue in Denver, CO.

Netwarat Merman, Bel-Rea Institute of Animal Technology 1681 S. Dayton Denver, CO 80247

Netwarat is an upper quarter student at Bel-Rea Institute of Animal Technology.

Dakota Cook, Bel-Rea Institute of Animal Technology 1681 S. Dayton Denver, CO 80247

Dakota is currently a student training to be a veterinary technician at Bel-Rea Institute of Animal Technology.

References

Fernandez-Parra, R. et al. (2017) ‘Comparison of intratesticular lidocaine, sacrococcygeal epidural lidocaine and intravenous methadone in cats undergoing castration: a prospective, randomized, investigator-blind clinical trial’, Veterinary Anaesthesia and Analgesia. doi: http://dx.doi.org/10.1016/j.vaa.2016.03.010

Huuskonen, V. et al. (2013) ‘Intratesticular lidocaine reduces the response to surgical castration in dogs’, Veterinary Anaesthesia and Analgesia, 40(1), pp. 74–82. doi: http://dx.doi.org/10.1111/j.1467-2995.2012.00775.x

McMillan, M. W., Seymour, C. J. and Brearley, J. C. (2012) ‘Effect of intratesticular lidocaine on isoflurane requirements in dogs undergoing routine castration’, Journal of Small Animal Practice, 53(7), pp. 393–397. doi: http://dx.doi.org/10.1111/j.1748-5827.2012.01233.x

Moldal, E. R. et al. (2013) ‘Intratesticular and subcutaneous lidocaine alters the intraoperative haemodynamic responses and heart rate variability in male cats undergoing castration’, Veterinary Anaesthesia and Analgesia, 40(1), pp. 63–73. doi: http://dx.doi.org/10.1111/j.1467-2995.2012.00773.x

Perez, T. E. et al. (2013) ‘Effects of intratesticular injection of bupivacaine and epidural administration of morphine in dogs undergoing castration’, Journal of the American Veterinary Medical Association, 242(5), pp. 631–642. doi: http://dx.doi.org/10.2460/javma.242.5.631

Additional Files

Intratesticular Lidocaine Infograph

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