Mostafa Ayman A, Cunningham Devin P, Boudrieau Randy J, Kowaleski Michael P, Griffon Dominique J
Department of Small Animal Surgery, College of Veterinary Medicine, Cairo University, Cairo, Egypt.
College of Veterinary Medicine, Western University of Health Sciences, Pomona, California.
Vet Surg. 2018 Apr;47(3):421-430. doi: 10.1111/vsu.12782. Epub 2018 Mar 12.
OBJECTIVE: To determine repeatability of and correlation between 2 radiographic measurements of femoral anteversion angles (FAA) and to determine their influence on a score derived from tibial plateau angle (TPA) and FAA to predict the risk of cranial cruciate ligament disease (CCLD). STUDY DESIGN: Prospective clinical study. ANIMALS: Forty-eight Labrador retrievers with or without CCLD. METHODS: FAA and CCLD scores were calculated for each limb from extended pelvic radiographs (t-FAA) or angled (a-FAA) projections of the femur by 3 investigators. One investigator repeated measurements twice. Data were analyzed for repeatability, correlation between t-FAA and a-FAA, and their influence on CCLD scores. RESULTS: FAA correlated most strongly with the distance between the femoral head and the femoral axis on mediolateral radiographs, a measurement with excellent repeatability. t-FAA and a-FAA correlated with each other (r > 0.79, P < .0001), although t-FAA were about 1° greater than a-FAA (P = .01). Intrainvestigator and interinvestigator repeatability of the CCLD score was fair when derived from t-FAA and good to excellent when derived from a-FAA. CCLD scores differed between radiographic techniques but led to different predictions in only 9 (10%) limbs, all with lower TPA and CCLD scores than the rest of the population. CONCLUSION: a-FAA correlated strongly with t-FAA and improved the repeatability of CCLD scores within and between investigators. CLINICAL SIGNIFICANCE: A craniocaudal angled beam projection of the femur is a suitable alternative to a ventrodorsal pelvic radiograph when measuring FAA and may improve the repeatability and positive predictive value of CCLD scores.
目的:确定两种股骨前倾角(FAA)影像学测量方法的可重复性及相关性,并确定它们对基于胫骨平台角(TPA)和FAA得出的评分的影响,以预测颅交叉韧带疾病(CCLD)的风险。 研究设计:前瞻性临床研究。 动物:48只患有或未患有CCLD的拉布拉多猎犬。 方法:3名研究人员从股骨的骨盆正位X线片(t-FAA)或斜位(a-FAA)投照中计算每个肢体的FAA和CCLD评分。一名研究人员重复测量两次。分析数据的可重复性、t-FAA与a-FAA之间的相关性及其对CCLD评分的影响。 结果:FAA与股骨内外侧位X线片上股骨头与股骨干轴线之间的距离相关性最强,该测量具有良好的可重复性。t-FAA与a-FAA相互关联(r>0.79,P<0.0001),尽管t-FAA比a-FAA大约大1°(P = 0.01)。当从t-FAA得出时,CCLD评分的研究人员内部和研究人员之间的可重复性一般,而从a-FAA得出时则为良好至优秀。CCLD评分在不同的影像学技术之间存在差异,但仅在9只(10%)肢体中导致不同的预测结果,所有这些肢体的TPA和CCLD评分均低于其他犬只。 结论:a-FAA与t-FAA密切相关,并提高了研究人员内部和研究人员之间CCLD评分的可重复性。 临床意义:在测量FAA时,股骨的头尾斜位投照是腹背位骨盆X线片的合适替代方法,可能会提高CCLD评分的可重复性和阳性预测价值。
Vet Comp Orthop Traumatol. 2015