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33rd Annual Scientific Meeting proceedings


Stream:   |   Session: Orthopaedic Short Communications
Date/Time: 06-07-2024 (16:00 - 16:15)   |   Location: Auditorium 1
Pericapsular hip desensitization in cats: a cadaveric study
Ríos-Reina M, Morgaz J, Domínguez JM, Granados MM, Fernández-Sarmiento JA, Medina-Bautista F
Animal Medicine and Surgery Department, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain.

Objectives:

Feline osteoarthritis (OA) is common, with 90% of geriatric cats being affected. The hip is one of the most commonly involved joints, however, it is frequently undiagnosed and untreated. This study aims to describe the sonographic anatomy of the medial aspect of the hip in cats and to assess feasibility of performing an ultrasound-guided medial pericapsular hip desensitization (US-mPHD).

Methods:

A prospective, double-blinded, randomized, anatomical study was performed. After US-scan in healthy cats, the sonographic interest area was delimited to the medial aspects of the hip. The US-mPHD blocks were performed bilaterally using two volumes (low volume group, LV, 0.1 mL/kg; high volume group, HV, 0.2 mL/kg) in each cadaver, one per hip. Nerve staining and possible complications were assessed by anatomical dissection. Comparison between groups was performed using Fisher´s exact test.

Results:

Eight cadavers were included. No significant differences between groups were found. The articular branches of the femoral nerve were stained in 50% and 75% of injections and the articular branches of the obturator nerve were stained in 75% and 87.5% using LV and HV, respectively. The cranial gluteal and sciatic nerves were never stained. The main femoral nerve was stained (12.5%) in both groups and the main obturator nerve was only stained (12.5%) using LV. No intravascular/intracapsular injection was found.

Conclusions:

The US-mPHD technique using both 0.1 and 0.2 mL/kg stained the articular branches of the femoral and obturator nerves in feline cadavers. This could represent a feasible approach in cats with hip OA. Clinical studies are required.   

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