Darcy M D, Sterling K M
Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO 63110, USA.
Radiology. 1996 Sep;200(3):707-10. doi: 10.1148/radiology.200.3.8756919.
To determine if a relationship exists between the right portal trunk (RPT) and bony structures that might aid guidance of needle passes into the RPT during transjugular intrahepatic portosystemic shunt (TIPS) placement.
Sixty-two TIPS portal venograms were reviewed. The distance of the mid-RPT from the lateral margin of the vertebral column was measured and calculated as a fraction of the adjacent vertebral body width. The cephalocaudal height of the RPT was compared with that of the posterior ribs and rib spaces. The cephalocaudal height was evaluated with frequency distribution, and scattergram plots were used to determine the most common location of the mid-RPT relative to bony structures. The height and lateral position were analyzed in relation to clinical parameters to determine the effect of these parameters on RPT position.
The mean distance of the mid-RPT from the lateral vertebral margin was 0.9 vertebral widths (range, 0.1-1.5). Fifty-six of 62 (90%) mid-RPTs were between 0.5 and 1.5 vertebral widths to the right of the lateral margin of the vertebrae. Fifty-four of 62 (87%) mid-RPTs were below the 10th and above the 12th ribs. Clinical factors did not affect RPT position.
Bony landmarks provide an approximation of the mid-RPT location and may aid in TIPS placement.
确定在经颈静脉肝内门体分流术（TIPS）放置过程中，右门静脉主干（RPT）与可能有助于引导穿刺针进入RPT的骨性结构之间是否存在关联。
回顾了62例TIPS门静脉造影片。测量RPT中点距脊柱外侧缘的距离，并计算为相邻椎体宽度的分数。比较RPT的头尾高度与后肋及肋间隙的头尾高度。通过频率分布评估头尾高度，并使用散点图确定RPT中点相对于骨性结构的最常见位置。分析高度和外侧位置与临床参数的关系，以确定这些参数对RPT位置的影响。
RPT中点距脊柱外侧缘的平均距离为0.9个椎体宽度（范围为0.1 - 1.5）。62个RPT中点中有56个（90%）位于椎体外侧缘右侧0.5至1.5个椎体宽度之间。62个RPT中点中有54个（87%）位于第10肋以下和第12肋以上。临床因素不影响RPT位置。
骨性标志可大致确定RPT中点的位置，并可能有助于TIPS的放置。
