Department of Surgery, School of Medicine of the Federal University of Minas Gerais, Avenida Professor Alfredo Balena 190, Belo Horizonte, MG, 30130-100, Brazil.
, Rua São Paulo, 925 - apto. 802, Belo Horizonte, 30170-906, Brazil.
Surg Radiol Anat. 2022 May;44(5):697-701. doi: 10.1007/s00276-022-02956-1. Epub 2022 May 11.
The literature reports the presence of the intermesenteric artery (IA), an anastomosis connecting the superior mesenteric artery (SMA) to the inferior mesenteric artery (IMA) in 9-18% of human cadaver dissections. This is the first study describing the morphological and demographic characteristics of the IA based on in vivo imaging.
A total of 150 consecutive abdominal computed tomography (CT) angiographies of adult patients identified by sex and age were analyzed. The IA was assessed for its presence, point of origin, pathway, point of insertion, and diameter at its origin. The diameters of the SMA, IMA, and other arteries from which the IA originated and into which it inserted were measured by CT angiography using Radiant™ and Osirix MD™ software.
The IA was found in 17 (51.5%) of the females and 60 (51.3%) of the males. The diameters of the SMA and IMA were larger in the males than in the females, but there was no sex difference in the diameter of the IA. The diameter of the SMA was larger than that of the IMA, and the diameter of the IA was smaller than that of the other arteries evaluated. An IA connecting the SMA and IMA trunks was found in 25.9% of the cases, while other connections between the branches of those trunks through an IA occurred less frequently.
The intermesenteric artery is more frequently found than the literature refers and in most of cases directly connects the upper and lower arterial mesenteric circulations.
文献报道肠系膜间动脉（IA）的存在，它是连接肠系膜上动脉（SMA）和肠系膜下动脉（IMA）的吻合支，在 9-18%的人体解剖中都有发现。这是第一个基于活体成像描述 IA 的形态和人口统计学特征的研究。
对 150 例连续的成年患者腹部 CT 血管造影术（CTA）进行分析，根据性别和年龄进行分组。评估 IA 的存在、起源点、途径、插入点和起源处的直径。使用 Radiant™ 和 Osirix MD™软件通过 CTA 测量 SMA、IMA 和 IA 起源和插入的其他动脉的直径。
在 17 名女性（51.5%）和 60 名男性（51.3%）中发现了 IA。男性的 SMA 和 IMA 直径大于女性，但 IA 的直径没有性别差异。SMA 的直径大于 IMA 的直径，IA 的直径小于评估的其他动脉的直径。在 25.9%的病例中发现了连接 SMA 和 IMA 干的 IA，而其他通过 IA 连接这些干的分支的连接则较少见。
IA 的发现频率高于文献报道，且在大多数情况下，IA 直接连接肠系膜上、下循环。
