The RANE Center, Jackson, MS, USA.
Vasc Med. 2021 Oct;26(5):549-555. doi: 10.1177/1358863X211003663. Epub 2021 Apr 12.
Minimum iliac vein caliber necessary to maintain normal peripheral venous pressure can be derived by the Poiseuille equation. Duplex was compared to intravascular ultrasound (IVUS) in the assessment of iliac vein stenosis in this single center retrospective study. Parallel IVUS and duplex caliber data for common iliac vein (CIV) and external iliac vein (EIV) in 382 limbs were separately compared. One or both segments were stenotic by IVUS criteria in 213 limbs. Neither segment was stenotic by IVUS in 22 limbs. Bland-Altman analyses and Passing-Bablok linear regressions were used. Duplex calibers were dimensionally than corresponding IVUS images of CIV and EIV segments in Bland-Altman comparison by a mean of 54 mm and 34 mm, respectively. Passing-Bablok regression suggested the difference was due to a systematic bias and not proportional. Duplex yields a smaller cross-sectional image of CIV and EIV compared to IVUS. Duplex is not a reliable diagnostic test for iliac vein stenosis.
根据泊肃叶方程可以推导出维持正常外周静脉压所需的最小髂静脉口径。在这项单中心回顾性研究中，我们将双功能超声与血管内超声（IVUS）进行了比较，以评估髂静脉狭窄。分别比较了 382 条肢体的髂总静脉（CIV）和髂外静脉（EIV）的 IVUS 和双功能超声的平行口径数据。213 条肢体的一个或两个节段根据 IVUS 标准存在狭窄。22 条肢体的两个节段均无狭窄。使用 Bland-Altman 分析和 Passing-Bablok 线性回归。在 Bland-Altman 比较中，双功能超声的 CIV 和 EIV 节段的内径分别比相应的 IVUS 图像小 54mm 和 34mm。Passing-Bablok 回归表明，这种差异是由于系统偏差而不是比例关系造成的。与 IVUS 相比，双功能超声对 CIV 和 EIV 的横截面成像更小。双功能超声不是髂静脉狭窄的可靠诊断测试。
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