A direct anterior approach (DAA) is a technique practiced by arthroplasty surgeons that can be technically challenging, most notably for inexperienced surgeons. The lateral femoral circumflex artery (LFCA) is a branch of the femoral artery that crosses the surgical field during DAA and is an important landmark for superficial surgical dissection. If the vessel is not identified, significant bleeding may occur, and visualization may be impaired. This study aimed to develop a reliable method to identify and ligate the LFCA with minimal bleeding. First, a retrospective review was performed on a series of patients who underwent primary DAA total hip arthroplasty. Epidemiologic and intraoperative radiologic information was collected to determine the 2-dimensional location of the LFCA as it coursed through the surgical interval. Second, a series of computed tomography (CT) angiograms were compared to validate the intraoperative anatomic findings. In this study, 108 patients were evaluated fluoroscopically and 100 CT angiograms were obtained, for 208 total patients. The distance of the LFCA from the lesser trochanter with standard fluoroscopy (LT/TD) was 0.600 vs 0.438 on CT angiogram. Mean offset from midline (offset/femur diameter) was 0.166 lateral to midline vs 0.36 medial to midline. Median value of offset was 0 vs 0.411—representing a position on the anatomic axis of the femur. This study confirmed that the LFCA is found approximately one-third to two-thirds of the way between the lesser and greater trochanters along the anatomic axis of the femur for most patients. Surgeons who are new to DAA can use the LFCA as a reliable landmark to confirm the correct interval. [Orthopedics. 20XX;XX(X):xx–xx.]

直接前路 (DAA) 是关节成形外科医生采用的一种技术，在技术上可能具有挑战性，尤其是对于经验不足的外科医生而言。旋股外侧动脉（LFCA）是股动脉的一个分支，在DAA过程中穿过手术野，是浅表手术解剖的重要标志。如果未识别出血管，可能会发生大量出血，并且可视化可能会受到损害。本研究旨在开发一种可靠的方法来识别和结扎 LFCA，并尽量减少出血。首先，对一系列接受初次 DAA 全髋关节置换术的患者进行回顾性评价。收集流行病学和术中放射学信息以确定 LFCA 在手术间隔期间的二维位置。其次，对一系列计算机断层扫描（CT）血管造影进行比较，以验证术中解剖结果。在这项研究中，共 208 名患者对 108 名患者进行了荧光镜评估，并获得了 100 张 CT 血管造影照片。标准透视 (LT/TD) 下 LFCA 与小转子的距离为 0.600，而 CT 血管造影为 0.438。距中线的平均偏移量（偏移量/股骨直径）为中线外侧 0.166，而中线内侧为 0.36。偏移的中值是 0 vs 0.411——代表股骨解剖轴上的位置。这项研究证实，对于大多数患者来说，LFCA 位于沿着股骨解剖轴的小转子和大转子之间的大约三分之一到三分之二处。刚接触 DAA 的外科医生可以使用 LFCA 作为可靠的标志来确认正确的间隔。[骨科。20XX;XX(X):xx–xx。]