Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, P.O. Box 57, Viikintie 49, 00014, Helsinki, Finland.
4pharma Ltd, Tykistökatu 4D, 20520, Turku, Finland.
Acta Vet Scand. 2020 May 12;62(1):19. doi: 10.1186/s13028-020-00517-3.
BACKGROUND: English bulldogs are known to be prone to skeletal problems, but knowledge is lacking of the effect of these problems on locomotion and function. This study was undertaken to report the conformational, orthopaedic and radiographic findings in a cohort of English bulldogs in Finland and to evaluate how these findings affect weight bearing and locomotion of the dogs. Twenty-eight English bulldogs were prospectively recruited to this cross-sectional study. An orthopaedic examination, measurements of conformation, static and dynamic weight bearing, and radiographic examinations of elbow, hip, stifle joints and spine were done. RESULTS: The English bulldogs carried a mean of 67.3% and 62.1% of their body weight in front limbs while standing and trotting, respectively. Front and hind limb lameness was seen in 20.8% (5/24) and 12.5% (3/24) of dogs, respectively. At orthopaedic examination, abnormal palpation findings (i.e. pain response, crepitation, swelling or subjectively decreased range of motion) were observed in a median of one joint (range 0-5) in each dog. Medial patellar luxation was diagnosed in 33.0% (8/24) of the evaluated dogs. At radiographic examination, elbow dysplasia was diagnosed in 48.2% (27/56) of elbow joints and severe hip dysplasia in 55.4% (31/56) of hip joints. The grade of elbow dysplasia was negatively associated with the ratio of static weight bearing between the front and hind limbs (slope estimate - 1.46, 95% CI - 2.75 to - 0.16, P = 0.03) and in dynamic weight bearing the ratio of total pressure index between the front and hind limbs (slope estimate - 0.088, 95% CI - 0.164 to 0.025, P = 0.03). The severity of hip dysplasia or hip osteoarthritis was not associated with the amount of static or dynamic weight bearing, but all except one dog were diagnosed with Fédération Cynologique Internationale grade C, D or E hips (dysplastic). In the spine, 78.6% (22/28) of the dogs had at least one malformed vertebra. CONCLUSIONS: Orthopaedic diseases and abnormal radiographic findings were common in the English bulldogs studied. The static weight bearing of the dogs was heavily distributed to the front limbs. With increasing severity of elbow dysplasia, the static and dynamic weight bearing shifted from dysplastic elbows to hind limbs.
背景:英国斗牛犬易出现骨骼问题,但目前对于这些问题对运动和功能的影响知之甚少。本研究旨在报告芬兰一组英国斗牛犬的体型、骨科和影像学发现,并评估这些发现如何影响犬只的负重和运动。28 只英国斗牛犬被前瞻性纳入本横断面研究。进行了骨科检查、体型测量、静态和动态负重以及肘部、臀部、膝关节和脊柱的放射学检查。
结果:英国斗牛犬站立和小跑时,前肢分别承重 67.3%和 62.1%的体重。20.8%(5/24)和 12.5%(3/24)的犬分别出现前肢和后肢跛行。在骨科检查中,每只犬中位数有 1 个关节(范围 0-5)存在异常触诊发现(即疼痛反应、弹响、肿胀或主观运动范围减小)。33.0%(8/24)的受评估犬诊断为内侧髌骨脱位。放射学检查显示,56 个肘部中有 48.2%(27/56)诊断为肘关节炎,56 个髋关节中有 55.4%(31/56)诊断为严重髋关节发育不良。肘部发育不良的严重程度与前肢和后肢的静态负重比呈负相关(斜率估计 -1.46,95%置信区间 -2.75 至 -0.16,P=0.03),在动态负重时与前肢和后肢的总压力指数比呈负相关(斜率估计 -0.088,95%置信区间 -0.164 至 0.025,P=0.03)。髋关节发育不良或髋关节骨关节炎的严重程度与静态或动态负重无关,但除 1 只犬外,其余犬均被诊断为犬髋关节发育不良国际联合会(Fédération Cynologique Internationale)C、D 或 E 髋关节(发育不良)。在脊柱方面,28 只犬中有 78.6%(22/28)至少有 1 个畸形椎体。
结论:研究中的英国斗牛犬常出现骨科疾病和异常放射学发现。犬只的静态负重主要分布在前肢。随着肘部发育不良的严重程度增加,静态和动态负重从发育不良的肘部转移到后肢。
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