Fukui Tomokazu, Fukunishi Shigeo, Nishio Shoji, Shibanuma Nao, Yoshiya Shinichi
Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho Nishinomiya, Hyogo 663-8501, Japan.
Orthopedics. 2010 Oct;33(10 Suppl):38-42. doi: 10.3928/01477447-20100510-61.
We have been using an image-free total hip arthroplasty (THA) navigation system (OrthoPilot; Aesculap, Tuttlingen, Germany) to ensure accurate and reproducible acetabular cup orientation. In this study, the accuracy of this system in the assessment of acetabular cup orientation was evaluated by comparing the intraoperative inclination and anteversion angles presented by the navigation system and the corresponding postoperative values obtained by computed tomography measurement. In the intraoperative accuracy analysis, we additionally examined the influence of factors such as body mass index and soft tissue thickness on assessment error. Intraoperative and postoperative results obtained from 115 consecutive navigated THAs were compared and analyzed. In both inclination and anteversion angles, good agreement was observed; a discrepancy of more than 5° was observed in 1 and 3 cases, respectively. In the analysis of factors potentially affecting the accuracy of the intraoperative assessment, no correlation between each parameter and the intraoperative and postoperative discrepancy was demonstrated.
我们一直在使用一种无图像全髋关节置换术（THA）导航系统（OrthoPilot；德国图特林根的蛇牌公司）来确保髋臼杯方向的准确和可重复性。在本研究中，通过比较导航系统呈现的术中倾斜角和前倾角与术后通过计算机断层扫描测量获得的相应值，评估了该系统在评估髋臼杯方向方面的准确性。在术中准确性分析中，我们还研究了体重指数和软组织厚度等因素对评估误差的影响。对连续115例导航THA的术中及术后结果进行了比较和分析。在倾斜角和前倾角方面，均观察到良好的一致性；分别有1例和3例出现超过5°的差异。在对可能影响术中评估准确性的因素分析中，未发现各参数与术中及术后差异之间存在相关性。
