Characteristics of aneurysms of the internal carotid artery bifurcation
Characteristics of aneurysms of the internal carotid artery bifurcation
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DOI：
10.1007/s00701-005-0682-4
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发表时间：
2006-02-01
影响因子：
2.4
通讯作者：
Kurisu, K
中科院分区：
文献类型：
--
作者：
Sakamoto, S;Ohba, S;Kurisu, K
背景动脉分叉处是血流动力学应力最大的部位，脑动脉瘤通常在此处发生。然而，在我们对颈内动脉（伊卡）分叉处动脉瘤进行血管内治疗的经验中，我们经常发现动脉瘤颈不一定只存在于伊卡分叉处（ICBi）。在这项研究中，我们回顾性评价了ICBI处动脉瘤的特征。对10例连续患者的10个ICBi动脉瘤进行了回顾性研究。测量动脉瘤的大小、伊卡与大脑前动脉（ACA）和大脑中动脉（MCA）的夹角以及伊卡、ACA和MCA的直径。测量颈动脉颈中线与伊卡动脉分叉点的距离，研究颈动脉颈与伊卡动脉分叉点的位置关系。平均动脉瘤尺寸为6.3 ± 3.2 mm，平均瘤颈为3.1 ± 1.2 mm。平均ICA-ACA角为57.3 ± 16.5 °，平均ICA-MCA角为128.9 ± 24.1 °。伊卡、ACA和MCA的平均直径分别为2.9 ± 0.5 mm、1.9 ± 0.4 mm和2.5 ± 0.4 mm。颈内动脉瘤颈中线与伊卡的平均距离为1.6 ± 0.6mm，所有颈内动脉瘤颈均起源于ACA侧。ICBi动脉瘤偏向ACA A1段一侧，此处动脉可能承受更高的血流动力学应力。
Background. Arterial bifurcations are sites of maximal hemodynamic stress, where cerebral aneurysms commonly develop. However, in our experience with endovascular treatment for aneurysms of the internal carotid artery (ICA) bifurcation, we often experienced that the aneurysmal neck did not necessarily exist only at the ICA bifurcation (ICBi). In this study, we have retrospectively evaluated characteristics of aneurysms at the ICBi.Methods. Ten ICBi aneurysms in 10 consecutive patients were studied retrospectively. The size of the aneurysms, the angles formed between the ICA and the anterior cerebral artery (ACA) and middle cerebral artery (MCA), and the diameter of the ICA, ACA and MCA were measured. Furthermore, to study the relationship between the location of the aneurysmal neck and the bifurcation of the ICA, the distance between the midline of the aneurysmal neck and of the ICA was measured.Results. The average aneurysm size was 6.3 +/- 3.2 mm and the average neck was 3.1 +/- 1.2 mm. The average ICA-ACA angle was 57.3 +/- 16.5 degrees, and the average ICA-MCA angle was 128.9 +/- 24.1 degrees. The average diameters of the ICA, ACA and MCA were 2.9 +/- 0.5 mm, 1.9 +/- 0.4 mm and 2.5 +/- 0.4 mm, respectively. The average distance between the midline of the aneurysmal neck and the ICA was 1.6 +/- 0.6 mm, and all aneurysmal necks of the ICBi arose from the side of the ACA.Conclusion. ICBi aneurysms were deviated to the side of the A1 segment of the ACA, where the artery might suffer higher hemodynamic stress.