Meomartino L, Greco A, Mennonna G, Auletta L, Pasolini M P, Fatone G, Costanza D, Lamagna B, Valle G D, Lamagna F
Interdepartmental Centre of Veterinary Radiology, University of Naples Federico II, Via Federico Delpino 1, Naples, 80137, Italy.
Department of Advanced Biomedical Sciences, University of Naples Federico II, Via Pansini 5, Naples, 80131, Italy.
J Small Anim Pract. 2021 Mar;62(3):187-193. doi: 10.1111/jsap.13270. Epub 2020 Dec 1.
The ventrodorsal hip extended standard view is conventionally used for radiographic screening of canine hip dysplasia. However, because the ventrodorsal hip extended standard view minimises hip joint laxity, several alternative views have been proposed. Our aim was to evaluate a new ventrodorsal hip flexed and not distracted view to assess joint laxity, by comparing it with the ventrodorsal hip extended standard and ventrodorsal hip flexed and distracted views.
Between April 2013 and March 2017, all dogs referred to the University of Naples "Federico II" for the diagnosis of canine hip dysplasia were studied using the ventrodorsal hip extended standard, ventrodorsal hip flexed and not distracted and ventrodorsal hip flexed and distracted views. The Norberg angle and the laxity index were measured for each view.
Overall, 102 dogs, 67 males and 35 females, mean age 15 months, were included. The mean (±standard deviation) Norberg angles were 99.77° (±10.42°), 89.29° (±14.32°) and 91.80° (±13.50°) for the ventrodorsal hip extended standard, ventrodorsal hip flexed and not distracted and ventrodorsal hip flexed and distracted views, respectively. The mean (± standard deviation) laxity indices were 0.19 (± 0.14), 0.39 (± 0.25) and 0.36 (± 0.21), respectively. The ventrodorsal hip flexed and distracted and ventrodorsal hip flexed and not distracted views had lower Norberg angle and higher laxity index values compared with the ventrodorsal hip extended standard view. The ventrodorsal hip flexed and distracted and ventrodorsal hip extended standard views are in strong agreement for the measurement of both Norberg angle and laxity index, as confirmed by Bland-Altman analysis and the intraclass correlation coefficient.
The ventrodorsal hip flexed and distracted and ventrodorsal hip flexed and not distracted views obtained with the hip in a neutral position reveal joint laxity better than the ventrodorsal hip extended standard view. Unlike the ventrodorsal hip flexed and distracted view, the ventrodorsal hip flexed and not distracted view does not require human operators or special devices for positioning the dog. The wide age range of the dogs enrolled might have influenced the laxity index measurements, since capsular fibrosis in older dogs reduces laxity.
传统上使用腹背位髋关节伸展标准视图对犬髋关节发育不良进行放射学筛查。然而，由于腹背位髋关节伸展标准视图会使髋关节松弛度降至最低，因此有人提出了几种替代视图。我们的目的是通过将一种新的腹背位髋关节屈曲且无牵引视图与腹背位髋关节伸展标准视图和腹背位髋关节屈曲且有牵引视图进行比较，来评估该视图对关节松弛度的评估情况。
在2013年4月至2017年3月期间，对所有转诊至那不勒斯“费德里科二世”大学诊断犬髋关节发育不良的犬只，使用腹背位髋关节伸展标准视图、腹背位髋关节屈曲且无牵引视图以及腹背位髋关节屈曲且有牵引视图进行研究。对每个视图测量诺伯格角和松弛度指数。
总共纳入了102只犬，其中67只为雄性，35只为雌性，平均年龄15个月。腹背位髋关节伸展标准视图、腹背位髋关节屈曲且无牵引视图以及腹背位髋关节屈曲且有牵引视图的平均（±标准差）诺伯格角分别为99.77°（±10.42°）、89.29°（±14.32°）和91.80°（±13.50°）。平均（±标准差）松弛度指数分别为0.19（±0.14）、0.39（±0.25）和0.36（±0.21）。与腹背位髋关节伸展标准视图相比，腹背位髋关节屈曲且有牵引视图和腹背位髋关节屈曲且无牵引视图的诺伯格角更低，松弛度指数值更高。布兰德 - 奥特曼分析和组内相关系数证实，腹背位髋关节屈曲且有牵引视图和腹背位髋关节伸展标准视图在诺伯格角和松弛度指数的测量上具有很强的一致性。
髋关节处于中立位时获得的腹背位髋关节屈曲且有牵引视图和腹背位髋关节屈曲且无牵引视图，比腹背位髋关节伸展标准视图能更好地显示关节松弛度。与腹背位髋关节屈曲且有牵引视图不同，腹背位髋关节屈曲且无牵引视图不需要人工操作或特殊设备来对犬进行定位。纳入研究的犬只年龄范围较广，这可能影响了松弛度指数的测量，因为老年犬的关节囊纤维化会降低松弛度。
