Harter-Dennis J M, Forster B W, Pescatore A J
Department of Poultry Technology and Management, University of Maryland Eastern Shore, Princess Anne 21853-1299.
Poult Sci. 1988 Nov;67(11):1647-50. doi: 10.3382/ps.0671647.
A quantitative technique was developed to measure the degree of flexion (twisting) and torsion (angulation) of the tibiotarsus bone from chickens affected with varus-angular bone deformity (varus-ABD). A plexiglass device was constructed consisting of X, Y, and Z-axis planes. The Y-axis plane was used to position the tibia in a constant reference position. The distance in millimeters from the (0, 0, 0) coordinate to the (X', 0, 0) coordinate was used to measure medial tibial flexion (TF), and the distance from the (0, 0, 5 cm) coordinate to the (X', 0, 5 cm) coordinate was used to measure lateral TF. The X-axis plane was fitted with a protractor to measure the angle of the proximal head of the tibia as a measure of tibial torsion (TT). The Z-axis plane was used to measure tibial length. Tibias with mild varus-ABD had TF values of greater than 0 but less than or equal to 5 mm, whereas severe varus-ABD tibias had TF values of greater than 5 mm. The TT values ranged from 10 to 60 degrees, with the lower values associated with severe varus-ABD.
开发了一种定量技术，用于测量患有内翻角骨畸形（内翻 - ABD）的鸡的胫跗骨的弯曲程度（扭转）和扭转（成角）。构建了一个由X、Y和Z轴平面组成的有机玻璃装置。Y轴平面用于将胫骨定位在恒定的参考位置。从（0, 0, 0）坐标到（X', 0, 0）坐标的毫米距离用于测量胫骨内侧弯曲（TF），从（0, 0, 5厘米）坐标到（X', 0, 5厘米）坐标的距离用于测量胫骨外侧TF。X轴平面装有一个量角器，用于测量胫骨近端头部的角度，作为胫骨扭转（TT）的度量。Z轴平面用于测量胫骨长度。患有轻度内翻 - ABD的胫骨的TF值大于0但小于或等于5毫米，而患有严重内翻 - ABD的胫骨的TF值大于5毫米。TT值范围为10至60度，较低的值与严重的内翻 - ABD相关。
