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首页> 美国卫生研究院文献>Annals of the Rheumatic Diseases >Poor accuracy and interobserver reliability of knee arthroscopy measurements are improved by the use of variable angle elongated probes
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Poor accuracy and interobserver reliability of knee arthroscopy measurements are improved by the use of variable angle elongated probes

机译：通过使用可变角度的细长探头膝关节镜测量的准确性和观察者间可靠性差

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Methods: Ovoid "lesions" were drawn on the five cartilage surfaces of four plastic knees models. Two observers assessed these 20 lesions arthroscopically, measuring two diameters in orientations parallel and orthogonal to the probe. Observer 1 (orthopaedic surgeon) and observer 2 (arthroscopic rheumatologist) made two sets of measurements, firstly with the conventional probe and five months later with the variable angle elongated (VAE) probes. The knees were disarticulated to determine true lesion diameter. Results: Observer 1 had negligible bias and good accuracy regardless of orientation or probe type. Observer 2 demonstrated both bias and poor accuracy using the conventional probe. Both improved using VAE probes. Poor interobserver reliability with conventional probes also improved using VAE probes. Major sources of variability could be traced to the probe type, the characteristics of the operator, and the orientation of the lesion in relation to the probe; the lesion location itself did not cause variability. Conclusions: Variation in accuracy and poor interobserver reliability of measurements with conventional methods of cartilage lesion diameter measurement improved when specially designed measurement probes were used. Arthroscopic measurements performed as well as most clinical and radiographic measures. These findings have important implications for the use of arthroscopy as an outcome in multicentre trials where arthroscopists have different levels of experience.
机译：方法：在四个塑料膝盖模型的五个软骨表面上绘制卵形“病变”。两名观察者用关节镜评估了这20个病变，在平行于探头的方向上测量了两个直径。观察者1（骨科外科医生）和观察者2（骨科风湿病学家）进行了两组测量，第一组使用常规探头，五个月后使用可变角度细长（VAE）探头。膝盖被分开以确定真实的病变直径。结果：无论方位或探头类型如何，观察者1的偏差和准确性都可以忽略不计。观察者2展示了使用常规探头的偏见和较差的准确性。两者均使用VAE探针进行了改进。使用VAE探针还改善了传统探针的观察者之间的可靠性。变异的主要来源可以追溯到探头的类型，操作者的特征以及病变相对于探头的方向。病变部位本身并未引起变异。结论：当使用专门设计的测量探头时，传统软骨损伤直径测量方法的测量准确性和观察者间差的可靠性得到改善。进行关节镜检查以及大多数临床和放射学检查。这些发现对于关节镜医师经验不同的多中心试验对关节镜的使用具有重要意义。

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