Salt Lake Orthopedic Clinic, Salt Lake City, UT.
Division of Spine Surgery in the Department of Orthopedics, Georgetown University Hospital, WA, DC.
Spine (Phila Pa 1976). 2022 Jun 15;47(12):865-872. doi: 10.1097/BRS.0000000000004338. Epub 2022 Feb 7.
STUDY DESIGN: Collectively, seven cadavers were instrumented with 124 thoracolumbar pedicle screws using VisAR augmented reality/guidance. Sixty-five screws were inserted into four donors using open dissection spine surgery. Fifty-nine screws were positioned in three donors with a minimally invasive spine surgery (MISS) procedure. For both open and MISS, VisAR was used exclusively for pedicle screw navigation. OBJECTIVE: The objective of this study was to determine the accuracy of pedicle screw placement using VisAR for open spine and MISS procedures. SUMMARY OF BACKGROUND DATA: Pedicle screw placement can be challenging depending on anatomical location and a surgeon's experience. AR may minimize fluoroscopy use and speed screw insertion. METHODS: Prior to computed tomography (CT) a series of four image visible April Tag optical fiducials were attached to the backs' of the donors. Resulting images were used preoperatively for planned virtual pedicle screw pathways including entry point, trajectory, and depth. The study link was encrypted on a quick response (QR) code, printed, and viewed in the operating room (OR) by the surgeon using VisAR (HoloLens 2 headset). Viewing the code wirelessly uploads and launches the study, converting the DICOM data to holographic images which register to the fiducials on the donor's back. The annotated pathways for each pedicle were called up by voice command and the surgeon positioned each screw by aligning with the virtual guidance hologram. RESULTS: Overall, 124 pedicle screws were inserted with VisAR navigation with 96% accuracy (Gertzbein-Robbins grades A and B). The combined angle of error was 2.4° and the distance error was 1.9 mm. CONCLUSION: Augmented reality is a highly accurate, emerging technology for navigating both open and minimally invasive spine surgery techniques with off-the-shelf headset hardware. LEVEL OF EVIDENCE: N/A.
研究设计:总共在 7 具尸体上使用 VisAR 增强现实/导航技术植入了 124 个胸腰椎椎弓根螺钉。在 4 名供体中使用开放式解剖脊柱手术插入 65 个螺钉。在 3 名供体中采用微创脊柱手术(MISS)程序植入 59 个螺钉。对于开放式和 MISS,仅使用 VisAR 进行椎弓根螺钉导航。 研究目的:本研究旨在确定 VisAR 在开放式脊柱和 MISS 手术中椎弓根螺钉放置的准确性。 背景资料概要:椎弓根螺钉的放置可能具有挑战性,具体取决于解剖位置和外科医生的经验。AR 可最大程度地减少透视使用并加快螺钉插入速度。 方法:在进行计算机断层扫描(CT)之前,在供体背部附着了一系列四个可见的 AprilTag 光学基准标记。术前使用这些图像规划虚拟椎弓根螺钉路径,包括进钉点、轨迹和深度。研究链接在快速响应(QR)码上加密,打印后,外科医生在手术室(OR)中使用 VisAR(HoloLens 2 耳机)查看。通过无线方式查看代码会上传并启动研究,将 DICOM 数据转换为与供体背部基准标记相注册的全息图像。通过语音命令调用每个椎弓根的注释路径,外科医生通过与虚拟引导全息图对齐来定位每个螺钉。 结果:总体而言,使用 VisAR 导航共插入 124 个椎弓根螺钉,准确率为 96%(Gertzbein-Robbins 分级 A 和 B)。总误差角为 2.4°,距离误差为 1.9mm。 结论:增强现实是一种高度准确的新兴技术,可用于导航开放式和微创脊柱手术技术,其现成的耳机硬件。 证据等级:无。
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