上腸間膜動脈

人体の解剖学において、上腸間膜動脈（SMA）は、腹部大動脈の前面から腹腔動脈幹の起始部のすぐ下方に起始し、十二指腸の下部から横行結腸の3分の2までの腸管、および膵臓に血液を供給する動脈である。

• Compared to other vessels of similar size, the SMA is largely spared from the effects of atherosclerosis. This may be due to protective haemodynamic conditions.
• Acute occlusion of the SMA almost invariably leads to intestinal ischemia and often has devastating consequences, with up to 80% of SMA occlusions leading to death.^[2]
• The SMA can compress the left renal vein, leading to nutcracker syndrome; and/or the third (horizontal) part of the duodenum, leading to superior mesenteric artery syndrome.

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  Animated Volume renderedCT scan of abdominal and pelvic blood vessels.
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  Superior mesenteric artery
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  Dissection showing the anatomical relationship between the superior mesenteric artery and surrounding structures

• Anatomy figure: 39:02-01 at Human Anatomy Online, SUNY Downstate Medical Center - "Branches of the inferior mesenteric artery."
• Anatomy photo:40:11-0102 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: Branches of the Abdominal Aorta"
• Anatomy image:8008 at the SUNY Downstate Medical Center
• Anatomy image:8404 at the SUNY Downstate Medical Center
• Anatomy image:8815 at the SUNY Downstate Medical Center
• Anatomy image:8841 at the SUNY Downstate Medical Center
• Atlas image: abdo_wall70 at the University of Michigan Health System - "Posterior Abdominal Wall, Dissection, Anterior View"
• sup&infmesentericart at The Anatomy Lesson by Wesley Norman (Georgetown University)