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Stifle Joint Rotational Variation in Extended Stifles in Healthy Dogs Undergoing Computed Tomography Examinations.
Veterinary and Comparative Orthopaedics and Traumatology ( IF 1.3 ) Pub Date : 2020-01-08 , DOI: 10.1055/s-0039-3400486
Clara M Allberg 1 , Fintan J McEvoy 1 , Lene E Buelund 1 , James E Miles 1
Affiliation  

OBJECTIVES  The aim of this study was to evaluate stifle joint rotational stability in response to body position and repositioning in dogs undergoing computed tomography (CT). MATERIALS AND METHODS  Nine dogs (18 stifles) with no history or clinical signs of stifle injury undergoing CT examinations for other reasons were included in the study. Dogs were positioned in alternating dorsal and sternal recumbency with the pelvic limbs extended caudally and unrestrained, for a total of four examinations. Scans included the entire tibia and distal femur. Using defined landmarks on the tibia and femur, stifle joint rotational angles were measured from multiplanar reconstructions made by two independent observers, and repositioning effects and intra- and interobserver agreement evaluated. RESULTS  Repositioning produced repeatable stifle joint rotational angles (pooled within-subject standard deviations of 0.9° and 1.4°) and intraobserver repeatability was good (within-subject standard deviations 1.4°), but interobserver agreement was poor. Dorsal and sternal positioning produced equivalent results. CLINICAL SIGNIFICANCE  The results indicate that little rotation occurs in the healthy extended canine stifle joint during positioning for CT and support CT as a method for assessing limb alignment around the stifle joint, provided that the limb distal to the femorotibial joint is unrestrained. Clinically, it is likely that measured changes in rotational angles across (and distant to) the stifle joint are real, rather than being due to rotation artefact during imaging.

中文翻译:

在接受计算机断层扫描检查的健康犬中,延长的窒息物的窒息关节旋转变化。

目的本研究的目的是评估在接受计算机断层扫描(CT)的犬中,由于体位和重新定位而产生的窒息关节旋转稳定性。材料与方法本研究纳入了9只狗(18头窒息),无其他病史或因其他原因接受过CT检查的膝关节损伤的临床体征。将狗置于背侧和胸骨交替的位置,使骨盆四肢向尾端伸展且不受约束,共进行四次检查。扫描包括整个胫骨和股骨远端。使用胫骨和股骨上定义的界标,由两名独立观察员进行的多平面重建术,测量了膝关节旋转角度,并评估了重定位效果以及观察者之间和观察者之间的一致性。结果重新定位产生了可重复的窒息关节旋转角度(合并的受试者内部标准偏差为0.9°和1.4°),观察者内部的重复性良好(受试者内部标准偏差为1.4°),但观察者之间的一致性较差。背骨和胸骨定位产生了相同的结果。临床意义该结果表明,在健康的扩展犬用窒息性关节定位进行CT和支撑CT的过程中,旋转是很少的,前提是股骨关节远端的肢体不受约束,这是评估该关节在膝关节周围的对齐方式的一种方法。在临床上,跨过(远离)窒息关节的旋转角度的测量变化很可能是真实的,而不是由于成像期间的旋转伪影所致。4°)和观察者内重复性良好(受试者标准偏差为1.4°),但观察者间一致性差。背骨和胸骨定位产生了相同的结果。临床意义该结果表明,在健康的扩展犬用窒息关节中进行CT和支撑CT定位时,只要股骨关节远端的肢体不受约束,就可以很少旋转,这是一种评估窒息关节周围肢体对齐方式的方法。在临床上,跨过(远离)窒息关节的旋转角度的测量变化很可能是真实的,而不是由于成像期间的旋转伪影所致。4°)和观察者内重复性良好(受试者标准偏差为1.4°),但观察者间一致性差。背骨和胸骨定位产生了相同的结果。临床意义该结果表明,在健康的扩展犬用窒息性关节定位进行CT和支撑CT的过程中,旋转是很少的,前提是股骨关节远端的肢体不受约束,这是评估该关节在膝关节周围的对齐方式的一种方法。在临床上,跨过(远离)窒息关节的旋转角度的测量变化很可能是真实的,而不是由于成像期间的旋转伪影所致。临床意义该结果表明,在健康的扩展犬用窒息性关节定位进行CT和支撑CT的过程中,旋转是很少的,前提是股骨关节远端的肢体不受约束,这是评估该关节在膝关节周围的对齐方式的一种方法。在临床上,跨过(远离)窒息关节的旋转角度的测量变化很可能是真实的,而不是由于成像期间的旋转伪影所致。临床意义该结果表明,在健康的扩展犬用窒息性关节定位进行CT和支撑CT的过程中,旋转是很少的,前提是股骨关节远端的肢体不受约束,这是评估该关节在膝关节周围的对齐方式的一种方法。在临床上,跨过(远离)窒息关节的旋转角度的测量变化很可能是真实的,而不是由于成像期间的旋转伪影所致。
更新日期:2020-01-08
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