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《Journal of Tongji University (Medical Science)》 2001-05
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A Study on SMV and SMA with SCT and its Clinical Significance

ZHAO Xiao hu, ZHENG Shao qiang, LI En mei, WU Yuan zuo (Dept.of Radiology, Tongji Hospital, Tongji University, Shanghai 200065, China)  
Objective To study the anatomic locations of superior mesenteric artery (SMA) and superior mesenteric vein (SMV) by SCT and to explore its clinical significance by recongnizing these relations with the surrounding organs including the uncinate process of pancreatic head, the third duodenum, etc..Methods 100 normal cases were performed with enhancement SCT. Imaging material of parenchymal enhancement from them was selected. First, we confirmed the level where SMA arises from the aorta, then take the level which is about 1.5 mm lower the aorta as our measurement and observation level.Results 83% of SMA and SMV were round in shape, only 17% of them were ellipse in shape in cross sections. Most of the lumen diameters of SMV were larger than that of SMA , little of them were equal,. and no exception was found contrarily. As for the anatomic locations between themselves, 94% of SMV lied on the right of SMA, only 6% of them lied parallelly in anterior and posterior directions. 51% of SMV were anterior to SMA,24% were posterior to it, and 19% ran parallelly. The average distance between them was 15.31 mm,; the average distance between SMV and the central sagittal line was 18.09 mm.; the average vertical distances between both SMV and SMA with the horizontal line of the anterior verge of spinal cord were 41.30±8.90 mm and 40.10±8.20 mm, respectively. All uninate process of pancreatic head extended between the inferior vena cava and SMV. In some cases, the third duodenum was dorsal to SMV and SMA.Conclusion SCT contrast examination can clearly demonstrate SMV and SMA; and their relations to the surrounding organs are helpful in diagnosis and especially in locating the uncinate process of the pancreatic head.
【CateGory Index】: R814.42
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