Broeders I A, Blankensteijn J D, Wever J J, Eikelboom B C
Department of Vascular Surgery GO4.232, University Hospital Utrecht, Heidelberglaan 100, 358 CX Utrecht, The Netherlands.
Eur J Vasc Endovasc Surg. 1999 Oct;18(4):300-7. doi: 10.1053/ejvs.1999.0900.
to determine the positional stability of the EndoVascular Technologies (EVT) endograft after endovascular aneurysm repair during morphologic changes of the abdominal aorta during follow-up.
all patients treated worldwide with an EVT endograft with an adequate postoperative and at least 12 months postoperative CT scan were included (n=125). Endograft migration was investigated by recording the position of the endograft attachment systems relative to the renal arteries and the aortic or iliac bifurcations. The vertical body axis served as a scale to quantify migration. Aortic cross-sectional areas were measured in the suprarenal aorta and in the proximal and distal aneurysm necks. Length changes of the infrarenal aorta during follow-up were measured, comparing the distance between the left renal artery and the aortic bifurcation.
the median follow-up was 24 months (range 12-48 months). Graft migration was identified in 4 out of 125 patients (3%). Significant infrarenal aortic dilation was observed at the proximal and distal aneurysm neck during follow-up. However, aortic neck dilation was not associated with endograft migration. The length of the infrarenal aorta did not change significantly after endovascular repair.
fixation by stents containing hooks of the EVT design appear to be effective in preventing migration of endografts with an unsupported trunk for up to four years. A stable position was maintained in spite of changes in cross-sectional areas of the aneurysm neck.
确定在随访期间腹主动脉形态变化过程中，血管内动脉瘤修复术后EndoVascular Technologies（EVT）血管内移植物的位置稳定性。
纳入全球范围内所有接受EVT血管内移植物治疗且术后CT扫描结果充分、术后至少12个月的患者（n = 125）。通过记录血管内移植物附着系统相对于肾动脉以及主动脉或髂动脉分叉的位置来研究移植物迁移情况。以垂直体轴作为量化迁移的尺度。测量肾上腺上方主动脉以及动脉瘤近端和远端颈部的主动脉横截面积。测量随访期间肾下主动脉的长度变化，比较左肾动脉与主动脉分叉之间的距离。
中位随访时间为24个月（范围12 - 48个月）。125例患者中有4例（3%）出现移植物迁移。随访期间在动脉瘤近端和远端颈部观察到明显的肾下主动脉扩张。然而，主动脉颈部扩张与血管内移植物迁移无关。血管内修复术后肾下主动脉长度无明显变化。
采用EVT设计的带钩支架固定似乎能有效防止无支撑主干的血管内移植物迁移长达四年。尽管动脉瘤颈部横截面积发生变化，但仍保持了稳定的位置。
