Department of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, Eberhard Karls University Tübingen, Schnarrenbergstr 95, 72076, Tübingen, Germany.
Knee Surg Sports Traumatol Arthrosc. 2013 Jan;21(1):189-96. doi: 10.1007/s00167-012-2114-3. Epub 2012 Jul 7.
The purpose of the study was to determine the interrater reliability as well as the correlation of mediCAD(®) and PreOPlan(®) in deformity analysis and digital planning of osteotomies.
Digital radiographs were obtained from 81 patients planned to undergo an open wedge high tibial osteotomy. The JPEG files of the radiographs were imported to landmark-based software. Deformity analysis and planning of correction were performed by 1 experienced and 2 unexperienced observers. Osteotomy planning was aimed at correction to the predefined mechanical tibiofemoral angle of 3° valgus leg alignment. The interrater reliability of measurements was assessed using intraclass correlation coefficients (ICCs) and the confidence interval.
The ICC of PreOPlan(®) was from 0.841 (mechanical lateral distal femur angle) to 0.993 (wedge-angle) and from 0.896 (joint line convergence angle) to 0.995 (mechanical tibiofemoral angle) of mediCAD(®). The ICC of height of wedge-base was 0.979 with PreOPlan(®) and 0.969 with mediCAD(®). Comparing PreOPlan(®) and mediCAD(®), the ICC of the height of wedge-base of the observers was 0.966, 0.956 and 0.969, respectively.
The results show a high interrater reliability of digital planning software. Experience of the observer had no influence on results. Furthermore, a high interrater reliability and correlation of digital planning specific parameters was found. Surgeons need to master limb geometry measurements and osteotomy planning on digital radiographs as digital planning reports are used for intercolleagual correspondence, teaching purposes and as medicolegal documents. The digital planning software tested agrees with the actual demands and could be recommended for deformity analysis and planning of osteotomies.
Diagnostic studies, Level I.
本研究旨在确定 mediCAD（®）和 PreOPlan（®）在畸形分析和截骨数字化规划中的组内相关系数（ICC）和相关性。
从 81 例拟行开放式楔形胫骨高位截骨术的患者中获取数字 X 线片。将 X 线片的 JPEG 文件导入基于标志点的软件中。由 1 名经验丰富的观察者和 2 名无经验的观察者进行畸形分析和矫正规划。截骨术规划的目标是矫正预设的机械胫股角 3°外翻腿对线。使用组内相关系数（ICC）和置信区间评估测量的组内相关系数。
PreOPlan（®）的 ICC 为 0.841（机械外侧远端股骨角）至 0.993（楔形角）和 0.896（关节线会聚角）至 0.995（机械胫股角），mediCAD（®）的 ICC 为 0.979（楔形基底高度）。PreOPlan（®）和 mediCAD（®）的观察者楔形基底高度的 ICC 分别为 0.966、0.956 和 0.969。
结果表明，数字化规划软件具有较高的组内相关系数。观察者的经验对结果没有影响。此外，还发现了数字化规划特定参数的高度组内相关系数和相关性。外科医生需要掌握肢体几何测量和截骨术的数字化规划，因为数字化规划报告用于同行交流、教学目的和法律文件。所测试的数字化规划软件符合实际需求，可推荐用于畸形分析和截骨术规划。
诊断研究，Ⅰ级。
