Estudo radiológico comparativo da displasia coxofemoral entre gatos da raça persa e sem raça definida
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Data
2007-05-14
Autores
Milken, Vanessa Martins Fayad [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A displasia coxofemoral felina difere da canina tanto nas manifestações clínicas como nos achados radiográficos. O objetivo deste estudo foi avaliar a displasia coxofemoral em felinos, especialmente da raça persa, descrever as principais alterações radiográficas e classificá-las de acordo com sua gravidade. Para tanto, radiografaram-se a pelve nas projeções de distração, compressão e extensão 100 gatos, machos e fêmeas, castrados ou inteiros, com idade superior a 24 meses, sendo 50 da raça persa e 50 sem raça definida. Os animais foram submetidos à sedação com medetomidina (80 ìg/kg), associada ao butorfanol (0,5 mg/kg) e atropina (0,044 mg/kg) por via intramuscular. Foram observados sinais radiográficos compatíveis com a doença em 23% dos gatos, destes, sete sem raça definida e 16, da raça persa. Foi observada diferença estatística entre as raças, o mesmo não ocorrendo entre machos e fêmeas. Os valores do ângulo de Norberg para gatos normais variaram de 93,55° a 98,6° e para displásicos, de 89,75°a 93,02°; os de índice de distração variaram de 0,06 a 0,4 para gatos normais e de 0,1 a 0,45 para os doentes. Os principais achados radiográficos encontrados nos felinos demonstraram diferenças com os caninos, tanto na anatomia radiográfica quanto nos sinais da displasia coxofemoral. Em gatos com articulações coxofemorais normais, a cabeça femoral pode se apresentar em forma de cogumelo, com menos de 50% recoberta pelo acetábulo, com leve aumento do padrão trabecular e com a borda acetabular cranial pontiaguda e afilada. Dentre as principais alterações radiográficas evidentes nos animais acometidos pela displasia coxofemoral pode-se citar a presença de osteófitos no bordo acetabular cranial, o arrasamento acetabular provocando desde incongruência articular leve até subluxação evidente, e, aumento acentuado no padrão trabecular.
The cats' hip dysplasia differs from the canine both in clinical signs and at the radiographic evidences. The aim of this study was to evaluate the hip dysplasia in cats, mainly from the persian breed, to describe the main radiographic alterations and to classify it according to the severity of the radiographic evidences. Therefore, X-rays were taken at distraction, compression and extension projections of 100 cats, males and females, castrated and not castrated, 24 months older, 50 of persian breed and 50 cross breed. The cats were submitted to sedation with intramuscular medetomidine (80 ìg/kg), associated to butorphanol (0.5 mg/kg) and atropine (0.044 mg/kg). Radiographic evidences compatibles with the disease were observed in 23% of the cats, seven mixed breed and 16 of persian breed. Statistical differences between the breeds were observed, but no difference was observed between males and females. The Norberg angle for normal cats varied from 93.55° to 98.6° and for dysplasics, from 89.75° to 93.02°. The distraction index varied from 0.06 to 0.4 for normal cats and from 0.1 to 0.45 for the affected cats. The main radiographic evidences of in the cats differed from canine's both in radiographic anatomy and hip dysplasia signs. In cats with normal hip articulations, the femur head can be presented in a mushroom form, with less than 50% recovered by the acetabulum, with a slightly increase of the trabecular pattern and with sharped cranial acetabular margin. Among the main radiographic alterations evidenced, the presence of osteophytes at the cranial acetabular margin, the acetabular degeneration provoking from slightly articular incongruence to evident subluxation and a major increase at the trabecular pattern were outstanding features.
The cats' hip dysplasia differs from the canine both in clinical signs and at the radiographic evidences. The aim of this study was to evaluate the hip dysplasia in cats, mainly from the persian breed, to describe the main radiographic alterations and to classify it according to the severity of the radiographic evidences. Therefore, X-rays were taken at distraction, compression and extension projections of 100 cats, males and females, castrated and not castrated, 24 months older, 50 of persian breed and 50 cross breed. The cats were submitted to sedation with intramuscular medetomidine (80 ìg/kg), associated to butorphanol (0.5 mg/kg) and atropine (0.044 mg/kg). Radiographic evidences compatibles with the disease were observed in 23% of the cats, seven mixed breed and 16 of persian breed. Statistical differences between the breeds were observed, but no difference was observed between males and females. The Norberg angle for normal cats varied from 93.55° to 98.6° and for dysplasics, from 89.75° to 93.02°. The distraction index varied from 0.06 to 0.4 for normal cats and from 0.1 to 0.45 for the affected cats. The main radiographic evidences of in the cats differed from canine's both in radiographic anatomy and hip dysplasia signs. In cats with normal hip articulations, the femur head can be presented in a mushroom form, with less than 50% recovered by the acetabulum, with a slightly increase of the trabecular pattern and with sharped cranial acetabular margin. Among the main radiographic alterations evidenced, the presence of osteophytes at the cranial acetabular margin, the acetabular degeneration provoking from slightly articular incongruence to evident subluxation and a major increase at the trabecular pattern were outstanding features.
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Palavras-chave
Radiografia veterinaria, Gato - Doenças - Diagnóstico, Diagnóstico por imagem
Como citar
MILKEN, Vanessa Martins Fayad. Estudo radiológico comparativo da displasia coxofemoral entre gatos da raça persa e sem raça definida. 2007. 71 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, 2007.