Renkawitz Tobias, Sendtner Ernst, Grifka Joachim, Kalteis Thomas
Department of Orthopedic Surgery, Regensburg University Medical Center, Bad Abbach, Germany.
Acta Orthop. 2008 Dec;79(6):785-8. doi: 10.1080/17453670810016858.
New computer-assisted measurement algorithms have been established to support the surgeon during total joint replacement intraoperatively. We asked whether the assessment of leg length and offset measured with an imageless navigation system is reliable during simulated total hip arthroplasty in a sawbone model test bench.
We found no statistically significant difference between change in leg length and offset measured on a millimeter scale connected to the test bench and that obtained with the calculation algorithm of the imageless navigation system.
Measurement of leg length and offset with an imageless navigation system is reliable during simulated total hip arthroplasty. The leg length situation algorithm offers the advantage of measuring leg length and offset by determination of the change in position of the femur relative to the pelvic coordinate system without the need to calculate the center of rotation of the hip joint. Further studies should address the accuracy of this imageless stem navigation method in an anatomical and clinical setting.
已建立新的计算机辅助测量算法，以在全关节置换术中为外科医生提供支持。我们探讨了在锯骨模型试验台上进行模拟全髋关节置换时，使用无影像导航系统测量腿长和偏心距是否可靠。
我们发现，连接到试验台以毫米为单位测量的腿长和偏心距变化与通过无影像导航系统计算算法获得的结果之间，在统计学上无显著差异。
在模拟全髋关节置换过程中，使用无影像导航系统测量腿长和偏心距是可靠的。腿长情况算法具有通过确定股骨相对于骨盆坐标系的位置变化来测量腿长和偏心距的优势，而无需计算髋关节的旋转中心。进一步的研究应关注这种无影像柄导航方法在解剖学和临床环境中的准确性。
