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Combined ultrasound/electrostimulation-guided block of the lumbosacral plexus in a cat undergoing pelvic limb amputation
  1. Robert Trujanovic1,
  2. Pablo E Otero2 and
  3. Maria Paula Larenza Menzies1
  1. 1Anesthesia and perioperative Intensive care Unit, Department of Small Animals and Horses, University of Veterinary Medicine, Vienna, Austria
  2. 2Anesthesiology Department, Veterinary Science Faculty, University of Buenos Aires, Buenos Aires, Argentina
  1. Correspondence to Robert Trujanovic; robert.trujanovic{at}


A cat was anaesthetised with midazolam and alfaxalone for a pelvic limb amputation due to a metatarsal fracture complicated with soft tissue necrosis. The femoral nerve and lumbosacral trunk were blocked with ropivacaine 0.75 per cent using a combined ultrasound/nervestimulation-guided approach. Anaesthesia was maintained with end-tidal concentrations of isoflurane between 1 per cent and 1.1 per cent. Vital parameters were stable during anaesthesia although moderate hypothermia (33.6°C–35.5°C) was encountered. The lateral cutaneous branch of the femoral nerve was desensitised with lidocaine 2 per cent at the end of the surgical procedures. The cat recovered well from anaesthesia and received meloxicam 0.05 mg/kg daily for postoperative pain treatment. Repeated evaluations using a composite pain scale showed values compatible with low probability of pain during the following 48 hours. Only one dose of methadone (0.2 mg/kg) was given. The combined femoral nerve and lumbosacral trunk block provided optimal intraoperative antinociception and postoperative pain relief.

  • anaesthesia
  • analgesia
  • orthopaedics
  • cats
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  • Contributors All authors contributed to the anaesthetic case management. RT and PEO performed the blocks and obtained the ultrasonographic images. RT and MPLM prepared the manuscript. PO critically reviewed the manuscript and edited the images. All authors approved the final version of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data availability statement Data are available in a public, open access repository.

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