Langenbach A, Green P, Giger U, Rhodes H, Gregor T P, LaFond E, Smith G
Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, PA 19104-6010, USA.
J Am Vet Med Assoc. 1998 Nov 15;213(10):1439-43.
To determine the relationship between degenerative joint disease (DJD) and passive laxity of the hip joint in a group of cats.
Prospective study.
A select (nonrandomized) group of 78 cats.
Standard hip-extended radiographic views and compression and distraction views of the pelvis were obtained from cats during sedation. Radiographs were evaluated, using an Orthopedic Foundation for Animals (OFA)-like scoring system for dogs. Passive joint laxity was measured, using Norberg angle (NA) and distraction index (DI). Hip laxity in cats with DJD was compared with hip laxity in cats without DJD.
Hip dysplasia (HD) was subjectively diagnosed radiographically in 25 of 78 (32%) cats using the OFA-like scoring system. Nineteen cats had mild HD 4 had moderate HD, and 2 had severe HD. Fifteen of the 25 cats with HD had DJD. The NA ranged from 56 to 105. The mean NA in cats with DJD was (84 degrees) significantly lower than in cats without DJD (95 degrees). The DI ranged from 0.2 to 0.84. The mean DI for cats with DJD was (0.6) significantly higher than that for cats without DJD (0.49). Cats with a DI < 0.4 did not have DJD. Cats had an increased likelihood of having DJD with increased laxity in the coxofemoral joint, as measured by NA or DI.
The mean NA for radiographically normal cats (92.4 degrees) was lower than that in radiographically normal dogs (103 degrees). The overall mean DI for cats in this group (0.51) is similar to dogs of breeds with high joint laxity, such as the Labrador Retriever (0.5). As in dogs, there is a relationship between DJD and laxity in the hip joint of cats.
确定一组猫的退行性关节病（DJD）与髋关节被动松弛之间的关系。
前瞻性研究。
一组经过挑选（非随机）的78只猫。
在猫镇静期间获取标准的髋关节伸展位X线片以及骨盆的压缩和牵引位X线片。使用类似动物骨科基金会（OFA）的犬类评分系统对X线片进行评估。使用诺伯格角（NA）和牵引指数（DI）测量被动关节松弛度。将患有DJD的猫的髋关节松弛度与未患DJD的猫的髋关节松弛度进行比较。
使用类似OFA的评分系统，在78只（32%）猫中通过X线片主观诊断出髋关节发育不良（HD）。19只猫患有轻度HD，4只患有中度HD，2只患有重度HD。25只患有HD的猫中有15只患有DJD。NA范围为56至105。患有DJD的猫的平均NA（为）84度，显著低于未患DJD的猫（95度）。DI范围为0.2至0.84。患有DJD的猫的平均DI（为）0.6，显著高于未患DJD的猫（0.49）。DI<0.4的猫没有DJD。通过NA或DI测量，随着股关节松弛度增加，猫患DJD的可能性增加。
X线片正常的猫的平均NA（92.4度）低于X线片正常的犬（103度）。该组猫的总体平均DI（0.51）与关节松弛度高的犬种（如拉布拉多猎犬，0.5）相似。与犬类一样，猫的DJD与髋关节松弛之间存在关联。
