Trattnig S, Schwaighofer B, Hübsch P, Kainberger F, Pötzleitner D
Abteilung für diagnostische Radiologie, II. Med. Universitätsklinik Wien.
Rofo. 1990 Dec;153(6):663-8. doi: 10.1055/s-2008-1033461.
A new software, called the velocity variance programme, by which flow disturbances are additionally colour-coded, was systematically applied with colour Doppler sonography in 59 patients with stenotic atheromatous lesions of different grades in the carotid bifurcation. A direct comparison with and without using this programme was made. In group 1 (n = 23) with stenosis of the internal carotid artery of more than 50% it could be demonstrated that flow disturbances were maximally in the region immediately downstream of the stenosis and complete dissipation of these effects occurred within 8-10 vessel diameters downstream. Moreover, a direct correlation between the size of the region of disturbed flow and the irregularity of the stenotic plaque surface within the stenosis could be demonstrated. Distal to the stenosis there was an inverse relationship between the extension of disturbed flow and the length of the stenosis and a direct relationship to the grade of the stenosis and the irregularity of the plaque surface. In patient group 2 (n = 36) with less than 50% diameter reduction, a local flow disturbance near the atheromatous plaque was shown in 27 patients. In eighteen of these patients the region of disturbed flow could be revealed only by using the velocity variance programme. The importance of this non-invasive in-vivo visualisation of flow disturbances in the carotid bifurcation is discussed.
一种名为速度方差程序的新软件，可对血流紊乱进行额外的彩色编码，我们将其与彩色多普勒超声检查一起系统地应用于59例患有不同程度颈动脉分叉处动脉粥样硬化狭窄病变的患者。对使用和不使用该程序的情况进行了直接比较。在第1组（n = 23）中，颈内动脉狭窄超过50%，结果显示血流紊乱在狭窄部位紧邻下游区域最为明显，这些影响在下游8 - 10个血管直径范围内完全消散。此外，还证实了狭窄部位内血流紊乱区域的大小与狭窄斑块表面不规则程度之间存在直接相关性。在狭窄部位远端，血流紊乱范围与狭窄长度呈负相关，与狭窄程度及斑块表面不规则程度呈正相关。在第2组患者（n = 36）中，管径缩小小于50%，27例患者显示动脉粥样硬化斑块附近存在局部血流紊乱。在其中18例患者中，仅通过使用速度方差程序才能发现血流紊乱区域。本文讨论了这种对颈动脉分叉处血流紊乱进行无创体内可视化的重要性。
