Department of Orthopaedics, University of Colorado School of Medicine, Denver, CO.
Department of Orthopaedics, Denver Health Medical Center, Denver, CO; and.
J Orthop Trauma. 2022 Oct 1;36(10):498-502. doi: 10.1097/BOT.0000000000002380.
To determine what size S1-transsacral (TS) corridor is amenable to TS screw placement, as this is commonly used to identify sacral dysmorphism, and to determine if gender, ethnicity, or screw breach is associated with narrow corridors.
Retrospective review.
Urban level-1 trauma center.
Two hundred ninety patients with pelvic ring injuries and preoperative computed tomography (CT) scans.
Percutaneous posterior pelvic ring fixation.
The width of the S1-TS corridor was measured on the axial (inlet) and coronal (outlet) reformatted CT images. Patients with S1-TS screw fixation and postoperative CT scans were identified. Corridor size, gender, ethnicity, and screw breach were documented.
S1-TS screws were placed in 55 of the 290 patients. No S1-TS screws were placed in corridors less than 8 mm. Corridors of <8 mm were present in 114 (39%) of the 290 patients and were not associated with gender or ethnicity. S1-TS screws placed in small (<10 mm) versus large (≥10 mm) corridors did not have a detectable difference in screw breaches (5 of 8, 62% versus 19 of 47 40%; difference, 22%, 95% confidence interval -14% to 52%) or median (interquartile range) screw breach distance [3 mm (2.5-4.8) versus 3 mm (1.2-4.8); difference, 0.9 mm; confidence interval -1.6 to 2.2].
These data are useful for the standardization of sacral dysmorphism reporting based on corridor size. Screw breaches were common irrespective of TS corridor size, emphasizing the small degree of error allowed by this procedure.
Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.
确定 S1-经骶（TS）通道的大小是否适合 TS 螺钉放置，因为这通常用于识别骶骨畸形，并确定性别、种族或螺钉突破是否与狭窄的通道有关。
回顾性研究。
城市一级创伤中心。
290 例骨盆环损伤患者和术前计算机断层扫描（CT）扫描。
经皮后路骨盆环固定。
在轴位（入口）和冠状位（出口）重建 CT 图像上测量 S1-TS 通道的宽度。确定有 S1-TS 螺钉固定和术后 CT 扫描的患者。记录通道大小、性别、种族和螺钉突破情况。
在 290 例患者中，55 例患者放置了 S1-TS 螺钉。S1-TS 螺钉未放置在小于 8mm 的通道中。在 290 例患者中，有 114 例（39%）的通道小于 8mm，与性别或种族无关。在小（<10mm）和大（≥10mm）通道中放置的 S1-TS 螺钉，螺钉突破的差异无统计学意义（8 例中的 5 例，62%与 47 例中的 19 例，40%；差异，22%，95%置信区间-14%至 52%）或中位数（四分位间距）螺钉突破距离[3mm（2.5-4.8）与 3mm（1.2-4.8）；差异，0.9mm；置信区间-1.6 至 2.2]。
这些数据对于基于通道大小的骶骨畸形报告的标准化很有用。无论 TS 通道大小如何，螺钉突破都很常见，这强调了该手术允许的微小误差程度。
预后 III 级。有关证据水平的完整描述，请参见作者说明。
