Objective: To verify the safety and feasibility of sacral alar screw fixation and fusion surgery in lumbosacral area. Methods: The clinical and radiological data of patients receiving L₅/S₁ single-level cortical bone trajectory screw combined with sacral alar screw decompression fixation and fusion in Beijing Chaoyang Hospital due to lumbar spinal stenosis from January 2019 to January 2020 were retrospectively analyzed. The clinical data included operation duration, intraoperative blood loss, postoperative drainage, pain and function scores during follow-up. The radiological data included preoperative and postoperative follow-up X-rays and three-dimensional reconstruction of lumbar spine CT. The fusion status and complication of internal fixation, such as screw loosening and fixation failure were evaluated by the radiological examination. Results: According to the inclusion and exclusion criteria, a total of 16 patients (7 males and 9 females) were included, with an average age of (69.6±5.2) years. The patients were followed-up for (16.2±1.7) months. The average operation duration was (144±21) min, the intraoperative blood loss was (103±20) ml, and the postoperative drainage was (80±34) ml. The patient’s low back pain visual analogue scale (VAS) score was 6.8±1.0 before surgery, and it was improved to 0.9±0.7 at the last follow-up; leg pain VAS score was 6.1±0.9 before the operation and it improved to 0.9±0.7 at the last follow-up; Oswestry disability index (ODI) function score was 66.2%±8.0% before the surgery and it decreased to 26.6%±7.2% at the last follow-up. No neurological complications, surgical site infection, screw loosening, internal fixation failure or cage displacement were observed during the follow-up. The fusion rate was 68.8% (11/16) at 6 months post operation. Conclusion: It is safe, feasible and effective to apply cortical screws combined with sacral alar screws in short-segment decompression, fixation and fusion surgery on the lumbosacral region to treat lumbosacral spinal stenosis.

目的： 探讨骶骨翼螺钉在腰骶区L₅/S₁节段固定融合手术的安全性及可行性。 方法： 回顾性分析2019年1月至2020年1月因腰椎管狭窄症于北京朝阳医院行L₅/S₁单节段经皮质骨轨迹螺钉联合骶骨翼螺钉减压固定植骨融合术患者的临床及影像学资料。临床资料包括手术时间、术中出血量、术后引流量等围手术期数据及随访期间疼痛及功能评分。影像学资料包括术前及术后随访X线及腰椎CT三维重建，根据影像学资料评估患者内固定位置、有无松动等并发症及融合情况。 结果： 根据纳入排除标准，共计纳入16例患者，其中男7例，女9例，年龄（69.6±5.2）岁，随访时间（16.2±1.7）个月。患者手术时间（144±21）min，术中出血（103±20）ml，术后引流量（80±34）ml。患者术前腰痛视觉模拟评分（VAS）为（6.8±1.0）分，末次随访时改善至（0.9±0.7）分；腿痛VAS评分由术前的（6.1±0.9）分改善至末次随访时的（0.9±0.7）分；Oswestry功能障碍指数由术前的66.2%±8.0%改善至末次随访时的26.6%±7.2%，差异均有统计学意义（均P<0.05）。所有患者术后均未出现神经系统并发症，无切口感染，在随访期间未出现内固定松动及失败、融合器移位等情况，术后6个月融合率为68.8%（11/16）。 结论： 采用皮质骨轨迹螺钉联合骶骨翼螺钉对腰骶部进行短节段减压固定融合手术来治疗腰骶部椎管狭窄症是安全可行且有效的。.