Conegero C I, Chopard R P, Miranda-Neto M H, Soares M A
Depto. de Ciêncas Morfofistiológicas, Universidade Estadual de Maringá, PR, Brasil.
Morphologie. 1997 Sep;81(254):5-8.
In this work the aorto-iliac bifurcation septum and the initial segment of the middle sacral artery were analyzed through optic microscope. 20 anatomical pieces of corpses from subjects of both sexes aging from 20 to 33 years were examined. After collection of pieces and fixation in formaline for 48 hours, histological sections of 20 microns were made and stained with the methods of Weigert, Verhoeff and Picrofucsine of Van Gieson. It was observed that the middle sacral artery arises from the posterior aortic wall laterally to the aorto-iliac bifurcation septum. The sequential analysis of the sections showed that the septum is lined by a thickening of connective tissue along its length and elastic fibers predominate on its central portion. Bundles of muscle fibers prevail on the lateral and posterior regions. It was observed, above the origin of the middle sacral artery, a reorganisation of tissues which represents, more caudally, the ostium of the artery. It was verified that the middle sacral artery arises at the aorto-iliac bifurcation septum, which is a transitional region and should be classified of mixed type and called aorto-septo-sacral transition.
在本研究中，通过光学显微镜对主动脉-髂动脉分叉隔膜和骶中动脉起始段进行了分析。检查了20例年龄在20至33岁之间的男女尸体解剖标本。在采集标本并在福尔马林中固定48小时后，制作了20微米厚的组织切片，并用魏格特法、韦尔霍夫法和范吉森苦味品红法进行染色。观察到骶中动脉起自主动脉后壁，位于主动脉-髂动脉分叉隔膜的外侧。对切片的连续分析表明，隔膜沿其长度由结缔组织增厚构成，中央部分以弹性纤维为主。外侧和后部区域以肌纤维束为主。在骶中动脉起始上方观察到组织重组，在更靠尾侧的位置为动脉开口。证实骶中动脉起于主动脉-髂动脉分叉隔膜，该隔膜是一个过渡区域，应归类为混合型，称为主动脉-隔膜-骶骨过渡区。
