PDF(Pubmed)
Abstract：
The azygos vein can be formed as a single root, two roots, and three roots, namely lateral, intermediate and the medial roots respectively. The hemiazygos vein and the accessory hemiazygos vein are the tributaries of azygos vein rather than its left side equivalents. Its variations, especially in young persons without any relevant risk factors, may result in thromboembolic illness. This study aimed to describe the morphological and morphometric variations of azygos system of veins. The present study was conducted on thirty formalin fixed adult human cadavers by dissecting azygos vein from formation to termination and variations were noted. The azygos vein was formed by a single root in 56.7%, by two roots: the lateral root and intermediate root in 36.7% cases and by the lateral root and medial root in 6.6%. The vertebral level of termination of azygos vein was seen at the level of T4 vertebrae in 70% cases, at the level of T3 vertebrae in 20% of cases and at the level of T5 vertebrae in 10% cases. The course of azygos vein was varying in 13.3%. These morphological variations can be useful while performing mediastinal surgery, mediastinoscopy, surgery of the deformations of the vertebral column, neurovascular surgeries of the retroperitoneal organs, disc herniation and fracture of thoracic vertebrae.
摘要：
奇静脉可以形成为单根，两个根，和三个根，即横向，中间和中间根分别。半奇静脉和副半奇静脉是奇静脉的支流，而不是其左侧等同物。它的变化，特别是在没有任何相关危险因素的年轻人中，可能导致血栓栓塞性疾病。本研究旨在描述静脉奇系统的形态和形态变化。本研究是在30具福尔马林固定的成年人尸体上进行的，方法是解剖从形成到终止的奇静脉，并注意到变化。奇静脉由单根形成，占56.7%，由两个根组成:36.7%的病例为侧根和中根，6.6%的病例为侧根和中根。70％的病例在T4椎骨水平上可见奇静脉终止的椎骨水平。在20％的病例中处于T3椎骨水平，在10％的病例中处于T5椎骨水平。奇静脉的病程变化为13.3％。这些形态学变异在进行纵隔手术时可能很有用，纵隔镜检查,脊柱变形的手术，腹膜后器官的神经血管手术，椎间盘突出和胸椎骨折。
