Department of Orthopaedic Surgery, Asahikawa Medical University, Midorigaoka-Higashi 2-1-1-1, Asahikawa, 078-8510, Japan.
Sci Rep. 2024 Jan 12;14(1):1158. doi: 10.1038/s41598-024-51785-2.
Accurate cup placement is critical to ensure satisfactory outcomes after total hip arthroplasty. Portable hip navigation systems are novel intraoperative guidance tools that achieve accurate cup placement in the supine position; however, accuracy in the lateral decubitus position is under debate. A new inertial portable navigation system has recently become available. The present study investigated the accuracy of measurements of the cup position in 54 patients in the lateral decubitus position using this system and compared it with that by a goniometer. After cup placement, cup abduction and anteversion were measured using the system and by the goniometer, and were then compared with postoperatively measured angles. Absolute measurement errors with the system were 2.8° ± 2.6° for cup abduction and 3.9° ± 2.9° for anteversion. The system achieved 98 and 96% measurement accuracies within 10° for cup abduction and anteversion, respectively. The system was more accurate than the goniometer for cup anteversion (p < 0.001), but not for abduction (p = 0.537). The system uses a new registration method of the pelvic reference plane and corrects intraoperative pelvic motion errors, which may affect measurement accuracy. In the present study, reliable and reproducible intraoperative measurements of the cup position were obtained using the inertial portable navigation system.
准确的杯置放对于全髋关节置换术后获得满意的结果至关重要。便携式髋关节导航系统是一种新型的术中引导工具，可在仰卧位实现准确的杯置放；然而，其在侧卧位的准确性仍存在争议。一种新的惯性便携式导航系统最近已经问世。本研究旨在探讨该系统在 54 例侧卧位患者中测量杯位置的准确性，并与角度规进行比较。在杯置放后，使用该系统和角度规测量杯外展和前倾角，并与术后测量的角度进行比较。系统测量的绝对误差为杯外展 2.8°±2.6°，前倾角 3.9°±2.9°。该系统在杯外展和前倾角的测量精度分别达到 98%和 96%，误差在 10°以内。与角度规相比，该系统在测量前倾角方面更准确（p<0.001），但在测量外展角方面没有差异（p=0.537）。该系统采用了新的骨盆参考平面注册方法，并纠正了术中骨盆运动误差，这可能会影响测量的准确性。在本研究中，使用惯性便携式导航系统获得了可靠且可重复的杯位置术中测量结果。
