Miles James E, Nielsen Dorte H, Jensen Bente R, Kirpensteijn Jolle, Svalastoga Eiliv L, Eriksen Thomas
Department of Small Animal Clinical Sciences, Faculty of Life Sciences, Copenhagen University, Frederiksberg C, Denmark.
Am J Vet Res. 2012 Feb;73(2):263-71. doi: 10.2460/ajvr.73.2.263.
To compare 5 patellar position indices at various stifle joint angles in cadavers of red foxes, determine measurement reliability, and assess the suitability of these indices for clinical use.
Pelvic limbs from cadavers of 12 red foxes (Vulpes vulpes).
Patellar position in each limb at 7 stifle joint angles (30° to 148°) was assessed by use of the Insall-Salvati (IS), modified Insall-Salvati (mIS), de Carvalho (dC), patellotrochlear (PT), and Blackburne-Peel (BP) indices.
Values for all indices varied significantly on the basis of joint angle, but for IS and mIS indices, this was minor and nonsignificant between 52° and 130° and between 52° and 148°, respectively. The dC index increased linearly, and PT and BP indices varied polynomially with increases in stifle joint angle. Stifle joint angles measured from radiographs agreed well with the goniometrically set stifle joint angles up to approximately 100° and diverged thereafter. Intraobserver and interobserver agreement was substantial for all indices, and IS index was the most precise.
IS and mIS index values were effectively independent of stifle joint angle, in contrast to dC, PT, and BP indices. The BP index varied nonsignificantly across a range of joint angles. To maximize angular accuracy, radiographs should not be obtained at joint angles > 100°. Although dC, PT, and BP indices appeared to be suitable for preoperative and postoperative evaluation of patellar position, BP index appeared to have the most promise for determination of patellar position in clinical applications.
比较赤狐尸体不同 stifle 关节角度下的 5 种髌骨位置指数，确定测量可靠性，并评估这些指数在临床应用中的适用性。
12 只赤狐（赤狐属）尸体的后肢。
使用 Insall-Salvati（IS）、改良 Insall-Salvati（mIS）、de Carvalho（dC）、髌股关节（PT）和 Blackburne-Peel（BP）指数评估每个肢体在 7 个 stifle 关节角度（30°至 148°）时的髌骨位置。
所有指数的值均因关节角度而异，但对于 IS 和 mIS 指数，在 52°至 130°以及 52°至 148°之间变化较小且无统计学意义。dC 指数呈线性增加，PT 和 BP 指数随 stifle 关节角度增加呈多项式变化。通过 X 光片测量的 stifle 关节角度与通过测角仪设定的 stifle 关节角度在约 100°以内吻合良好，此后出现偏差。所有指数的观察者内和观察者间一致性良好，IS 指数最精确。
与 dC、PT 和 BP 指数不同，IS 和 mIS 指数值实际上与 stifle 关节角度无关。BP 指数在一系列关节角度范围内变化无统计学意义。为使角度准确性最大化，如果关节角度＞100°，则不应获取 X 光片。尽管 dC、PT 和 BP 指数似乎适用于髌骨位置的术前和术后评估，但 BP 指数在临床应用中确定髌骨位置方面似乎最具前景。
