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摘要
Objective-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.
Sample-Pelvic limbs from cadavers of 12 red foxes (Vulpes vulpes).
Procedures-Patellar position in each limb at 7 stifle joint angles (30 degrees to 148 degrees) was assessed by use of the Insall-Salvati (IS), modified Insall-Salvati (mIS), de Carvalho (dC), patellotrochlear (PT), and Blackburne-Peel (BP) indices.
Results-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 degrees and 130 degrees and between 52 degrees and 148 degrees, 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 degrees and diverged thereafter. Intraobserver and interobserver agreement was substantial for all indices, and IS index was the most precise.
Conclusions and Clinical Relevance-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 degrees. 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. (Am J Vet Res 2012;73:263-271)
- 出版日期2012-2
