Gomes M N, Choyke P L
Department of Surgery, Georgetown University Medical Center, Washington, D.C.
J Cardiovasc Surg (Torino). 1990 Sep-Oct;31(5):621-8.
Congenital anomalies of major venous structures are not common but their identification and relative position, particularly in relation to an abdominal aortic aneurysm, are of significant value in planning and conducting aortic operations. Computed tomography (CT) has become a common method of preoperative evaluation of aortic disease. Its reliability in providing accurate information regarding aneurysmal size, configuration, and extension, as well as the presence of intraluminal thrombus and involvement of the renal and iliac arteries, has been demonstrated. Simultaneous visualization of the major adjacent venous structures with the use of contrast enhancement is obtained, but anatomic variants can be overlooked because they are commonly subtle and considered incidental. The preoperative diagnosis of these venous abnormalities is significant to the vascular surgeon. Such information can be accurately and reliably acquired with the present CT techniques without the need for further diagnostic studies.
主要静脉结构的先天性异常并不常见，但其识别及相对位置，尤其是与腹主动脉瘤相关的位置，在规划和实施主动脉手术中具有重要价值。计算机断层扫描（CT）已成为主动脉疾病术前评估的常用方法。它在提供有关动脉瘤大小、形态、延伸范围以及腔内血栓的存在情况，还有肾动脉和髂动脉受累情况的准确信息方面的可靠性已得到证实。通过使用对比增强可同时显示主要相邻静脉结构，但解剖变异可能会被忽视，因为它们通常很细微且被视为偶然发现。这些静脉异常的术前诊断对血管外科医生很重要。利用当前的CT技术可以准确可靠地获取此类信息，而无需进一步的诊断研究。
