Ultrasound-guided femoral and obturator nerves block in the psoas compartment in dogs: anatomical and randomized clinical study

Veterinary Anaesthesia and Analgesia
Hamaseh TayariAngela Briganti

Abstract

To evaluate intraoperative and postoperative efficacy of ultrasound (US)-guided femoral (FN) and obturator (ON) nerves block, in the iliopsoas muscle compartment (IPM), using an in-plane technique. Anatomical research and randomized, prospective, 'blinded' clinical study. Six dog cadavers and 20 client-owned dogs undergoing tibial plateau levelling osteotomy (TPLO) surgery. In phase 1, anatomical dissections and US imaging of the IPM were performed to design an US-guided nerve block involving the FN and ON simultaneously. The technique was considered successful if new methylene blue solution injection (0.1 mL kg-1) stained FN-ON for ≥2 cm. In phase 2, the US-guided nerve block designed in phase 1, combined with US-guided sciatic nerve (ScN) block, was performed in 20 dogs undergoing TPLO surgery. Patients were assigned randomly to one of two treatment groups: ropivacaine 0.3% (R3, n=10) and ropivacaine 0.5% (R5, n=10) at a volume of 0.1 mL kg-1 for each nerve block. Intraoperative success rate (fentanyl requirement < 2.1 mcg kg-1 hour-1) and postoperative pain score [Short Form-Glasgow Composite Measure Pain Scale (SF-GCMPS) ≥ 5/20] were evaluated. In phase 1, the US image of FN-ON was detected between L6 and L7. In-plane needl...Continue Reading

Citations

May 10, 2019·Journal of Feline Medicine and Surgery·Diego Rodrigo-Mocholi, Fernando Martinez-Taboada
Mar 15, 2021·Veterinary Anaesthesia and Analgesia·Vincent MarolfHelene Rohrbach

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