Scuola di Bioscienze e Medicina Veterinaria, Università degli Studi di Camerino, Matelica, Italy.
Clinica Veterinaria San Silvestro, VetSanSilvestro s.r.l, Castiglion Fiorentino (AR), Italy.
Vet Comp Orthop Traumatol. 2020 Sep;33(5):308-315. doi: 10.1055/s-0040-1709694. Epub 2020 May 14.
The aim of this study was to evaluate the inter- and intra-observer reliability of plain digital radiographs for assessing normal feline femoral and tibial joint reference angles in the sagittal and frontal planes.
This was a cadaveric radiographic anatomical study. that involved 20 short-haired domestic adult cats.
Sagittal and frontal plane tibial and femoral joint angles of 40 limbs were measured twice by three observers with different levels of experience. Inter- and intraobserver reliability was determined by the intra-class correlation coefficient (ICC). An ICC > 0.75 was considered high correlation, 0.74 > ICC > 0.60 good correlation, 0.59 > ICC > 0.4 fair correlation and an ICC < 0.40 poor correlation.
Mean ± standard deviation angles were anatomic lateral proximal femoral angle (aLPFA) 110.6 ± 3.6; anatomic lateral distal femoral angle (aLDFA) 91.9 ± 2.1; mechanical lateral proximal femoral angle; mLPFA (mLPFA) 107.3 ± 3.6; mechanical lateral distal femoral angle (mLDFA) 95.5 ± 1.7; femoral neck anteversion (FNA) 121.9 ± 4.1; anatomical caudal proximal femoral angle (aCPFA) 156.1 ± 3.9; anatomical caudal distal femoral angle (aCDFA) 101.4 ± 1.4; mechanical medial proximal tibial angle (mMPTA) 93.5 ± 1.2; mechanical medial distal tibial angle (mMDTA) 100.5 ± 2.3; mechanical cranial proximal tibial angle (mCrPTA) 113.1 ± 3.2; tibial plateau angle (TPA) 23.1 ± 3.2; mechanical cranial proximal tibial angle (mCrDTA) 86.7 ± 3.1.The intra-observer ICC indicated high correlation for 70% or more of the measurements. The inter-observer agreement among observers was high. These results show that the radiographic method for measuring femoral and tibial joint angles was good or high, except for FNA and mCrDTA.
This study provides some radiographic anatomical and mechanical joint angles of the femurs and tibias of normal domestic short-haired cats. We found good reliability for both intra- and interobserver measurements.
本研究旨在评估在矢状面和额状面评估正常猫股骨和胫骨关节参考角度的普通数字射线照相的观察者内和观察者间可靠性。
这是一项尸体放射解剖学研究，涉及 20 只短毛家猫。
通过 3 名具有不同经验水平的观察者对 40 条肢体的矢状面和额状面胫骨和股骨关节角度进行了两次测量。观察者内和观察者间的可靠性通过组内相关系数（ICC）确定。ICC>0.75 被认为是高度相关，0.74>ICC>0.60 是良好相关，0.59>ICC>0.4 是中等相关，ICC<0.40 是较差相关。
平均±标准偏差角度为解剖外侧股骨近端角（aLPFA）110.6±3.6；解剖外侧股骨远端角（aLDFA）91.9±2.1；机械外侧股骨近端角；mLPFA（mLPFA）107.3±3.6；机械外侧股骨远端角（mLDFA）95.5±1.7；股骨颈前倾角（FNA）121.9±4.1；解剖尾侧股骨近端角（aCPFA）156.1±3.9；解剖尾侧股骨远端角（aCDFA）101.4±1.4；机械内侧胫骨近端角（mMPTA）93.5±1.2；机械内侧胫骨远端角（mMDTA）100.5±2.3；机械颅侧胫骨近端角（mCrPTA）113.1±3.2；胫骨平台角（TPA）23.1±3.2；机械颅侧胫骨近端角（mCrDTA）86.7±3.1。观察者内 ICC 表明，70%或更多测量值的相关性较高。观察者间的观察者间一致性很高。这些结果表明，除了 FNA 和 mCrDTA 外，测量股骨和胫骨关节角度的放射照相方法是好的或高的。
本研究提供了正常家短毛猫股骨和胫骨的一些放射解剖和机械关节角度。我们发现观察者内和观察者间测量均具有良好的可靠性。
