Department of Radiology, Weill Cornell Medical Center, 416 East 55th Street, New York, NY, 10022, USA.
Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, 14853, USA.
J Cardiovasc Magn Reson. 2019 Jan 3;21(1):3. doi: 10.1186/s12968-018-0503-6.
To determine the effect of hydration as well as prone versus supine positioning on the pelvic veins during cardiovascular magnetic resonance (CMR) venography.
Under institutional review board approval, 8 healthy subjects were imaged with balanced steady state free precession, non-contrast CMR venography to measure common and external iliac vein volumes and common femoral vein cross-sectional area in the supine, prone and decubitus positions after dehydration and again following re-hydration. CMR venography from 23 patients imaged both supine and prone were retrospectively reviewed and measurements of common femoral and iliac veins areas were compared using Wilcoxon test.
Common femoral vein area on CMR venography increased with prone positioning (83 ± 35 mm) compared to supine positioning (59 ± 21 mm) (p = 0.02) and further increased with hydration to 123 ± 44 mm (p < 0.01). With right and left side down decubitus positioning, the common femoral vein area on dehydration increased from 29 ± 17 mm in the ante-dependent position to 134 ± 36 mm in the dependent position (p < 0. 001). Similarly, common and external iliac veins increased in volume with prone, 5.4 ± 1.9 cm and 5.8 ± 1.9 cm compared to supine positioning 4.6 ± 1.8 cm and 4.5 ± 1.9 cm (p = 0.01) and further increase with hydration to 6.7 ± 2.1 cm and 6.3 ± 1.9 cm (p = 0.01). CMR venography on patients also demonstrated an increase in mean common femoral vein luminal area from 103 ± 44 mm in supine position to 151 ± 52 mm with prone positioning (p < 0.001) as well as increases in common and external iliac vein volumes from 6.5 ± 2.6 cm and 8.0 ± 3.4 cm in the supine position to 7.5 ± 2.5 cm and 9.3 ± 3.6 cm with prone positioning (p < 0.01).
Common femoral and common/external iliac vein size on CMR venography may be affected by position and hydration status. Routine clinical CMR venography of the pelvis could include prone positioning and avoiding dehydration to maximize pelvic vein distension.
为了确定在心血管磁共振（CMR）静脉造影期间水合作用以及俯卧位与仰卧位对盆腔静脉的影响。
在机构审查委员会批准下，8 名健康受试者接受了平衡稳态自由进动、非对比 CMR 静脉造影检查，以测量仰卧位、俯卧位和脱水后再水化后的髂总静脉和外髂静脉体积以及股总静脉横截面积。回顾性分析了 23 例同时行仰卧位和俯卧位 CMR 静脉造影的患者的 CMR 静脉造影资料，采用 Wilcoxon 检验比较股总静脉和髂静脉面积的测量值。
与仰卧位（59 ± 21mm）相比，俯卧位（83 ± 35mm）时股总静脉面积在 CMR 静脉造影中增加（p=0.02），并且在水合作用后进一步增加至 123 ± 44mm（p<0.01）。右侧和左侧卧位时，在依赖位置时股总静脉面积从 29 ± 17mm 增加到 134 ± 36mm（p<0.001）。同样，与仰卧位 4.6 ± 1.8cm 和 4.5 ± 1.9cm 相比，股总静脉和髂总静脉的体积在俯卧位时增加，为 5.4 ± 1.9cm 和 5.8 ± 1.9cm（p=0.01），并且在水合作用后进一步增加至 6.7 ± 2.1cm 和 6.3 ± 1.9cm（p=0.01）。患者的 CMR 静脉造影也显示，从仰卧位的 103 ± 44mm 到俯卧位的 151 ± 52mm，股总静脉腔面积的平均值增加（p<0.001），并且股总静脉和髂总静脉的体积也从仰卧位的 6.5 ± 2.6cm 和 8.0 ± 3.4cm 增加到俯卧位的 7.5 ± 2.5cm 和 9.3 ± 3.6cm（p<0.01）。
CMR 静脉造影中股总静脉和髂总/外髂静脉的大小可能受体位和水合状态的影响。为了最大限度地扩张盆腔静脉，常规的盆腔 CMR 静脉造影可包括俯卧位和避免脱水。
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